翻訳が不自然な箇所を以下にテキストで逐一指摘してくれている方がいたが、行きつ戻りつ確認しながら読むのが大変なので、勝手ながら指摘箇所を中心に翻訳を修正して以下にまとめ直した。いまだに信じて動画を広めてしまっている人に「それ間違いですよ」と指摘しようにも、記事の誤訳が多かったりするとちょっとなぁ、となるので。

http://www.misho-web.com/tmp/ayano.txt

なお、もし元の翻訳記事が適切に修正されれば本記事は消すつもりだが、和訳した方は当時Twitter で指摘されてこの校正テキストを読んだはずなのに、もう1年半ほど放置されているのであまり期待していない。

間違いを打ち消すために、まともな太陽系の公転運動を描いた動画があれば知りたいものである。

違う、太陽系は渦巻きではない [BAD ASTRONOMY翻訳 記事]

なめらかな動きでコンピューターアニメーションが太陽の周りを周る惑星の動きを、天の川銀河を周る太陽軌道のように解説する動画について、ツイートやメールがたくさん来ている。とてもきれいな動画に、説得力のある音楽、ていねいな作りの画像。

しかし、問題がひとつある。間違っているのだ。間違いは表面的なものではなく、間違った前提からきた根本的なものだ。中にはいくつかの有益な視覚情報があるが、私は(銀河サイズの)話題のタネだと思っておくよう警告する。

なぜか? 彼の主張の基礎は、「惑星は太陽中心の軌道を描いているのではなく、銀河の周りを渦巻き状に移動している」というものだ。

私は普段、こうした話題の間違いを暴くような面倒なことはしない。奇抜な主張はいつでもあるし、たいていは自滅していくからだ。しかし、この件についてはたくさんの人が私に知らせてきたし、明らかにかなり人気を博している――たぶん表面上は正しく見えるし、画像も大変きれいだからだろう。また、科学を知りつつもそこから離れて久しい人たちによって広まっているのではないかと見ている。このような話題を扱うときには、いつも少し深く掘り下げる手間がかかる。

そこで、シャベルを取り出してみよう。

制御不能のらせん

まずは動画を見てみよう。数分程度のものだ。

動画の作者DJ Sadhuは明らかにコンピュータグラフィックスの才能がある。しかし科学は……まあ。私にはすぐさまこの動画が何を目指しているのかわかった。彼は率直に、太陽系の太陽中心モデルは間違っている、と述べている。しかしながら、この Sadhuの主張ははなはだしく間違っている。重力は存在しないと言っているようなものだ。

地動説とは、太陽が太陽系の中心にあるという考え方で、惑星はその周りを周っている(他にもいくつか大事なことがあり、たとえば惑星の軌道は楕円であるとか、軌道は同一平面上にあるのではなくて互いに傾いているとか)。この考え方は、地球が太陽系の中心だという古い天動説にとってかわった。天動説は、それをちゃんとした物理のモデルだと考えると、あらゆる種類の奇妙な仮定をしてやらないとちゃんと機能しない、とてつもなく複雑で考えすぎの物理モデルになってしまう(タイレノールなどの頭痛薬があるなら、epicyclesの項を見てみよう)。地動説はそれよりもずっと物理的に正しいし、ずっとうまく機能している。

私は、どちらのモデルにもそれぞれの使い道があると言いたいのだ。もし特定の惑星が天のどこにあるのか知りたいなら、天動説の座標を使うことになる。われわれは地球に住んでいて、地球は動かずに天の車輪が頭上を回転して動いているように見える、それは理にかなっている。しかし、もし惑星へ宇宙探査機を送りたいなら、太陽中心のシステムが必要なのだ。地球も惑星も両方とも動いていると考える方が、はるかに計算は簡単になる。

Sadhuは、地動説が間違っていて、実は惑星は渦を描きながら太陽を周る動きをしているのだと主張している。彼が実際に言わんとしているものは、渦ではなくらせんである。この2つは名前が違うだけでなく、物理的な動きもその特徴も全く異なる。らせん軌道を描く粒子は、太陽系のようにお互いには干渉していなくてもよいが、渦を描く粒子は抗力と摩擦を通じて互いに干渉している。

しかし、意味論的な論争はよそう。もう一度動画を見てみよう。Sadhuは太陽が惑星を先導しているかのように、太陽が惑星よりも前方に出て銀河を回っているかのように描いている(2番目のビデオだともっとそれは明白だ)。これは単に誤解を招くだけでなく、完全に間違っている。惑星は、われわれが銀河系の中を巡るとき、ときどき確かに太陽の前に出たり、ときどきその後ろをついてゆく(太陽を周回する軌道上のどこにいるかによる)。実際に夜空の惑星を見たことのある人にとっては明白な真実である。なぜなら夜空の一部は、地球や太陽が銀河系を周るときの進行方向にあたるわけだが、惑星はその部分にだって観測されるのだ。

ここでも、細かいことをあれこれ議論するのはやめよう。後述するように（「こうした考え方はどこからもたらされたのか?」の項）、惑星が銀河系内を動くときに太陽の後ろをついていくという考え方は、Sadhuがらせんについて述べるときの思考基盤となっている。しかしまずは、もうちょっと見てみよう。

テイク2

太陽が銀河の中を移動していく様子を示している、彼が二番目に公表した動画では、もっとひどい状況だ。

公平のために言うと、今回彼は惑星の動きについて「らせん状」だと正しく記述している。しかし、まだ惑星が太陽の後ろをついていくように描いていて、これは間違っている。また特に動画の冒頭では、太陽中心モデルと、らせん運動についての彼の説明を具体的に比較しており、誤った「太陽主導」の考え方を補強している。

彼の動画における太陽中心モデルの動きを注意深く見てみよう。銀河を周る太陽が動く方向は、惑星の軌道平面と同じに描かれている。しかし、こうではないのだ。太陽系の平面は、車の前方への動きに対してフロントガラスが作る角度のように、銀河系に対して約60度で傾いている。

これは本当に重要な点だ。らせんモデルでは、銀河を周る太陽の動きにあわせて、太陽を垂直に周回するような惑星が描かれている。お好みなら「正面向き」といってもいい。これが間違っている。なぜなら、惑星の軌道は60度で傾いていて、90度ではない。惑星はときに太陽の前に、ときに後ろになる。これだけで、らせん描写が正しくないことがわかる。地動説という現実のモデルにおいても、順行-逆行運動というものは存在し、現実の空できちんと観測できる〔訳注:詳しくはこちら参照〕。

しかしそれだけではない。動画では、太陽が銀河を周ることを見せていて、らせんに沿って上昇、下降している。最初の動画のように、一部正しいところもあるが、大方は事実からかけ離れている。

われわれの銀河は、中心部が膨らんでいる平たい円盤で、端から端まで約10万光年の距離がある。この円盤は無数の星を内包し、その重力が合わさって、銀河中心を周る軌道に太陽を留めている。ちょうど、太陽の重力が惑星を軌道に留めているのと同じだ。

太陽が銀河系を一周する軌道の長さは、およそ2.4億光年ではない。銀河を周回するときには、だいたい動画にあるように、太陽は実際ぴょこぴょこアップダウンを繰り返している(とはいえ大体1周につき4回ぐらいなのに、Sadhuは動画内で数十回もアップダウンするように描いている)。〔訳注:太陽系が銀河系内を周回する軌道の図参照（垂直方向は強調されている）〕

このような運動が起きるのは、銀河円盤での重力の働き方のせいだ。ここが非常にクールなところだ。円盤よりほんのわずか上にあるものは、円盤に向かって全体的に下へと引っ張られる。円盤が巨大な物質の板であると想像してみて、太陽がその円盤よりも上にあるとする。円盤の重力は太陽を下へと引っ張る。星と星の間は遠く離れているので、太陽は円盤の間を通り抜けて下へ降りていく。そうすると今度は、下に来てしまった太陽を円盤がまた引っ張り上げる。このとき、太陽の動きはだんだん遅くなり、そして止まり、向きを逆にしてまた円盤へと急激に突入する。太陽は、銀河円盤の中心から上下にそれぞれ200光年ぐらいの浮き沈みをするが、円盤は1000光年の厚みをもっているので、結局私たちは銀河円盤の中にしっかり留まっている。しかしこうした摂動は永遠に続き、太陽は大海のコルクのように浮き沈みを続ける。

太陽は銀河を周回しているので、合わさった動きはすてきな波のパターンになり、浮きつ沈みつ回転木馬のようにまわり続ける。ゆえに、Sadhuはこの部分に関しては(多かれ少なかれ)正しい。

だいたいはね。しかしここに3つ目の要素が加えられている。ひねったらせんを描く太陽の道筋を、彼は歳差運動の性質だとしている。この部分は間違っている。非常に間違っている。

歳差運動は物体が回転するときにてっぺんをぐらぐらさせる動きで、回転の中心軸からずれた向きの力をてっぺんに加えたときに起きるものだ。コマのてっぺんを突くとぐらつく、それが歳差運動だ。地球自身も太陽と月の重力に引っ張られて歳差運動をしており、その軸の1回の揺れ周期は2万6000年だ。

明らかにSadhuは、動画の中でこれを表現している。しかし、ぐらつきは太陽にまったくなんの影響も与えていない。それはただ、地球が何かしているだけだ。しかし、Sadhuは銀河を周る太陽の動きに付け加えていて、それは意味をなさない。動画では銀河を周るコークスクリュー(コルク栓抜きのような螺旋運動)を描いているが、ときには銀河の中心に寄り、ときには遠くへ離れる動きを何度も何度も繰り返している。回転木馬のたとえでいえば、馬が真ん中で回って、上下に、また左右に動いているようなものだ。しかし、それは太陽の本当の動きではない。左右の運動なんてない(軌道ごと何度も銀河の中心に向かったり離れたりするなんて)。Sadhuの示すコークスクリューパターンは、間違っているのだ。

動画と解説文において、Sadhuはかなり頻繁に、座標系と力と運動を混乱させている。

彼はなぜこんな正しくない運動を描くのだろうか。それを掴むため、彼が元にした文献をあたってみた。

こうした考え方はどこからもたらされたのか?

動画と彼のサイトによると、SadhuはPallathadka Keshava Bhatという人から学んだそうだ。Bhatによる「らせんの渦巻き:太陽系の動的プロセス」(“Helical Helix: Solar System a Dynamic Process”〔リンク切れのためこちら参照〕)と題された文章にこの考え方はすべて説明してあり、細かすぎる点は指摘しないが、ちんぷんかんぷんなものだった。まじめな話、どれもまったく意味をなさない。Bhatは地動説は間違っていると主張しているのだが、その主張を補強するために、虚偽のアイディアを次から次へと用いているのだ。彼の主張の間違いを暴くためにページを割くこともできるが、ここは短くまとめてみよう。

私はBhatの主張を何度も読んで、可能な限り好意的に考えようとした。私がかき集めたところでは、彼が言っているのは、太陽の動きによって、太陽を先頭にして惑星が後をついていくという形で、惑星は銀河系内でコルク栓抜き状のらせん運動をする、よって地動説は間違っているというものだ。Sadhuの動画の解説文によると、こうした動きをうまく描いているという。しかし、どれも完全に間違っている。もしそれが正しいのなら、外惑星(太陽から地球よりも遠くにある、火星や木星など)は太陽の反対側に遠く離れて見えないだろう。しかしいつだって、私たちには見えている。

それに、私たちは何度もほかの惑星へ宇宙探査機を送っていて、どれもいまだその軌道上にある。もしBhatがいうように地動説が間違っているのなら、探査機はいつになっても目的の惑星に到達できない。探査機を送るための軌道計算が間違っていることになるからだ。探査機の道筋を計算するときに銀河を周る太陽の動きを考慮する必要なんて全くないから、Bhat氏のいうことは正しくない。

太陽が太陽系の先頭で、惑星はその後ろをついていくという主張も、明らかに間違っている。太陽は、Bhatが主張し(Sadhuが動画で示して)いるように、銀河系を突き進む弾頭のように太陽系を主導したりしていない。惑星は太陽の周囲を周り、全体が一つのユニットとして銀河系を60度の傾きで移動している。これは、銀河の軌道に沿って惑星はときに太陽の前になり、ときに後ろに続くということだ。

これはそう、道を歩くあなたの頭の周りを、端にボールの付いた紐がぐるぐる周っているようなものだ(この円は60度傾いている)。ボールはときに頭の前になり、ときに後ろになる。道を歩くときには常にあなたと一緒だが、歩く速さには関係なく、相対的にはあなたと同じ速さでいつも移動している。あなたが自分の動きを線で表すとすると、ボールは傾いたらせんを描くだろう。これこそBhatとSadhuが説明しようとしたことなのだが、しかし間違った説明になってしまった。

Bhatは、その文章の中でいくつもの間違いと論理的誤ちを犯している。たとえば、Sadhuの地球歳差運動の誤用についてBhatが何と言っているか読み取ろうとした。しかし、とても不明瞭で(それに単純なミスもあり、彼は歳差運動の周期を22万5000年としているが、実際には2万6000年)ゴルディアスの結び目を解いているみたいだった。まだほかにも。彼は、もし地動説が正しいなら、日食は1カ月に1回起きなければならないと考えている(46ページと134ページを参照。ちなみに日蝕が一ヶ月に1回起きないのは、月の軌道が傾いているため)。また、彼は「太陽中心軌道は不可能であると意味しなければならない」と結論付けた部分で、地球が太陽の周りを周る回転について根本的な勘違いをしているようだ(文書の30ページを参照のこと)。実質、私が読んだ文章の1ページごとに基本的・根本的な間違いがあった。

そしてこれが、Sadhuの(間違っているにしてもステキな)動画が基礎としているものなのだ、いいかい? いっておくが、もしSadhuのサイトをのぞいてみたら、あらゆる種類の……んー、おかしな陰謀論……9.11陰謀説から、ケムトレイルから、デイヴィッド・アイク(本気で爬虫類型異星人がデンバー空港の地下に住んでいて世界を支配していると主張している)が怒り狂いそうなのから、名前しかない程度のものまで見つかるだろう。私は、彼のほかの考え方を念頭に置くことにした。

続きと、進行中のこと

DJ Sadhuの動画は、とてもステキで、そのうちいくつかは真実を元にしたものだ。しかし、私の意見ではBhatのゆがんだ宇宙に対する見方のせいで、その核心が失われてしまっている。

彼の動画は正しいように見える。クールであるように見える。ものごとはこうでなくっちゃ、というセンスに訴えかけるものがある。しかし、物事がどうあるべきかと、実際にどうなのかということはいつも重なり合うわけではない。宇宙は本当にクールな場所で、とてもよく出来た一連の法則に基づいて動いている。私たちはこうした法則を「物理」と呼んでいて、それは数学で記述されている。そしてそういうこと全部を理解しようとする試みが、科学である。

クールなものがすべて科学ではない。しかし科学の全てはクールだ。これは普遍的な法則ではないかもしれない。けれども、私の見てきた限り、これは真実なのだ。

Permalink | 記事への反応(2) | 23:03

2013-03-14

■http://anond.hatelabo.jp/20130314141756

kinectやleap motionのことか？

Permalink | 記事への反応(0) | 16:50

2012-08-07

■20120805 立川 モノレール下（かんね）

window - The album leaf

thule - The album leaf

slow motion - polaris

no surprise - radiohead

I wanna be adored - The stone roses

someday - The strokes

1979 - The smashing pumpkins

プラネットマジック - n'夙川 boys

time to wonder - gypsy & The cat

ruby - great3

そして僕は途方に暮れる - 大沢誉志幸

friend of the night - mogwai

I dub fish - fishmans

precious - 坂本美雨

calm - maritime

summertime clothes - animal collective

ふられ気分でRock'nRoll - TOM☆CAT

コズミック・ヒッピー - サニーデイ・サービス

fishing - Moodman

on the radio - The concretes

夜を駆ける - スピッツ

Permalink | 記事への反応(0) | 02:22

2012-01-05

■Types of digital cameras

Digital cameras are made in a wide range of sizes, prices and capabilities. The major ity are camera phones, operated as a mobile application through the cellphone menu. Professional photographers and many amateurs use larger, more expensive digital single-lens reflex cameras (DSLR) for their greater versatility. Between these extremes lie digital compact cameras and bridge digital cameras that "bridge" the gap between amateur and professional cameras. Specialized cameras including multispectral imaging equipment and astrographs continue to serve the scientific, military, medical and other special purposes for which digital photography was invented.

[edit]Compact digital cameras

Subcompact with lens assembly retracted

Compact cameras are designed to be tiny and portable and are particularly suitable for casual and "snapshot" uses. Hence, they are also called point-and-shoot cameras. The smallest, generally less than 20 mm thick, are described as subcompacts or "ultra-compacts" and some are nearly credit card size.[2]

Most, apart from ruggedized or water-resistant models, incorporate a retractable lens assembly allowing a thin camera to have a moderately long focal length and thus fully exploit an image sensor larger than that on a camera phone, and a mechanized lens cap to cover the lens when retracted. The retracted and capped lens is protected from keys, coins and other hard objects, thus making it a thin, pocketable package. Subcompacts comm only have one lug and a short wrist strap which aids extraction from a pocket, while thicker compacts may have two lugs for attaching a neck strap.

Compact cameras are usually designed to be easy to use, sacrificing advanced features and picture quality for compactness and simplicity; images can usually only be stored using lossy compression (JPEG). Most have a built-in flash usually of low power, sufficient for nearby subjects. Live preview is almost always used to frame the photo. Most have limited motion picture capability. Compacts often have macro capability and zoom lenses but the zoom range is usually less than for bridge and DSLR cameras. Generally a contrast-detect autofocus system, using the image data from the live preview feed of the main imager, focuses the lens.

Typically, these cameras incorporate a nearly silent leaf shutter into their lenses.

For lower cost and smaller size, these cameras typically use image sensors with a diagonal of approximately 6 mm, corresponding to a crop factor around 6. This gives them weaker low-light performance, greater depth of field, generally closer focusing ability, and smaller components than cameras using larger sensors.

Starting in 2011, some compact digital cameras can take 3D still photos. These 3D compact stereo cameras can capture 3D panoramic photos for play back on a 3D TV.[3] Some of these are rugged and waterproof, and some have GPS, compass, barometer and altimeter. [4]

[edit]Bridge cameras

Sony DSC-H2

Main article: Bridge camera

Bridge are higher-end digital cameras that physically and ergonomically resemble DSLRs and share with them some advanced features, but share with compacts the use of a fixed lens and a small sensor. Like compacts, most use live preview to frame the image. Their autofocus uses the same contrast-detect mechanism, but many bridge cameras have a manual focus mode, in some cases using a separate focus ring, for greater control. They originally "bridged" the gap between affordable point-and-shoot cameras and the then unaffordable earlier digital SLRs.

Due to the combination of big physical size but a small sensor, many of these cameras have very highly specified lenses with large zoom range and fast aperture, partially compensating for the inability to change lenses. On some, the lens qualifies as superzoom. To compensate for the lesser sensitivity of their small sensors, these cameras almost always include an image stabilization system to enable longer handheld exposures.

These cameras are sometimes marketed as and confused with digital SLR cameras since the appearance is similar. Bridge cameras lack the reflex viewing system of DSLRs, are usually fitted with fixed (non-interchangeable) lenses (although some have a lens thread to attach accessory wide-angle or telephoto converters), and can usually take movies with sound. The scene is composed by viewing either the liquid crystal display or the electronic viewfinder (EVF). Most have a longer shutter lag than a true dSLR, but they are capable of good image quality (with sufficient light) while being more compact and lighter than DSLRs. High-end models of this type have comparable resolutions to low and mid-range DSLRs. Many of these cameras can store images in a Raw image format, or processed and JPEG compressed, or both. The major ity have a built-in flash similar to those found in DSLRs.

In bright sun, the quality difference between a good compact camera and a digital SLR is minimal but bridgecams are more portable, cost less and have a similar zoom ability to dSLR. Thus a Bridge camera may better suit outdoor daytime activities, except when seeking professional-quality photos.[5]

In low light conditions and/or at ISO equivalents above 800, most bridge cameras (or megazooms) lack in image quality when compared to even entry level DSLRs. However, they do have one major advantage: their much larger depth of field due to the small sensor as compared to a DSLR, allowing larger apertures with shorter exposure times.

A 3D Photo Mode was introduced in 2011, whereby the camera automatically takes a second image from a slightly different perspective and provides a standard .MPO file for stereo display. [6]

[edit]Mirrorless interchangeable-lens camera

Main article: Mirrorless interchangeable-lens camera

In late 2008, a new type of camera emerged, combining the larger sensors and interchangeable lenses of DSLRs with the live-preview viewing system of compact cameras, either through an electronic viewfinder or on the rear LCD. These are simpler and more compact than DSLRs due to the removal of the mirror box, and typically emulate the handling and ergonomics of either DSLRs or compacts. The system is used by Micro Four Thirds, borrowing components from the Four Thirds DSLR system.

[edit]Digital single lens reflex cameras

Cutaway of an Olympus E-30 DSLR

Main article: Digital single-lens reflex camera

Digital single-lens reflex cameras (DSLRs) are digital cameras based on film single-lens reflex cameras (SLRs). They take their name from their unique viewing system, in which a mirror reflects light from the lens through a separate optical viewfinder. At the moment of exposure the mirror flips out of the way, making a distinctive "clack" sound and allowing light to fall on the imager.

Since no light reaches the imager during framing, autofocus is accomplished using specialized sensors in the mirror box itself. Most 21st century DSLRs also have a "live view" mode that emulates the live preview system of compact cameras, when selected.

These cameras have much larger sensors than the other types, typically 18 mm to 36 mm on the diagonal (crop factor 2, 1.6, or 1). This gives them superior low-light performance, less depth of field at a given aperture, and a larger size.

They make use of interchangeable lenses; each major DSLR manufacturer also sells a line of lenses specifically intended to be used on their cameras. This allows the user to select a lens designed for the application at hand: wide-angle, telephoto, low-light, etc. So each lens does not require its own shutter, DSLRs use a focal-plane shutter in front of the imager, behind the mirror.

[edit]Digital rangefinders

Main article: Rangefinder camera#Digital rangefinder

A rangefinder is a user-operated optical mechanism to measure subject distance once widely used on film cameras. Most digital cameras measure subject distance automatically using electro-optical techniques, but it is not customary to say that they have a rangefinder.

[edit]Line-scan camera systems

A line-scan camera is a camera device containing a line-scan image sensor chip, and a focusing mechanism. These cameras are almost solely used in industrial settings to capture an image of a constant stream of moving material. Unlike video cameras, line-scan cameras use a single row of pixel sensors, instead of a matrix of them. Data coming from the line-scan camera has a frequency, where the camera scans a line, waits, and repeats. The data coming from the line-scan camera is comm only processed by a computer, to collect the one-dimensional line data and to create a two-dimensional image. The collected two-dimensional image data is then processed by image-processing methods for industrial purposes.

Further information: Rotating line camera

[edit]Integration

Many devices include digital cameras built into or integrated into them. For example, mobile phones often include digital cameras; those that do are known as camera phones. Other small electronic devices (especially those used for communication) such as PDAs, laptops and BlackBerry devices often contain an integral digital camera, and most 21st century camcorders can also make still pictures.

Due to the limited storage capacity and general emphasis on convenience rather than image quality, almost all these integrated or converged devices store images in the lossy but compact JPEG file format.

Mobile phones incorporating digital cameras were introduced in Japan in 2001 by J-Phone. In 2003 camera phones outsold stand-alone digital cameras, and in 2006 they outsold all film-based cameras and digital cameras combined. These camera phones reached a billion devices sold in only five years, and by 2007 more than half of the installed base of all mobile phones were camera phones. Sales of separate cameras peaked in 2008. [7]

Integrated cameras tend to be at the very lowest end of the scale of digital cameras in technical specifications, such as resolution, optical quality, and ability to use accessories. With rapid development, however, the gap between mainstream compact digital cameras and camera phones is closing, and high-end camera phones are competitive with low-end stand-alone digital cameras of the same generation.

[edit]Waterproof

A Canon WP-1 waterproof 35 mm film camera

Waterproof digital cameras are digital cameras that can make pictures underwater. Waterproof housings have long been made but they cost almost as the cameras. Many waterproof digital cameras are shockproof and resistant to low temperatures; one of them is Canon PowerShot D10, one of the first underwater digital cameras.

These cameras become very popular during the holiday seas on, because many people want to save the best moments from their holidays at the seaside. Waterproof watches and mobile phones were produced earlier. Most makers of digital cameras also produce waterproof ones and every year they launch at least one new model, for example Sony, Olympus, Canon, Fuji.

Healthways Mako Shark, an early waterproof camera,[8] was launched in 1958 and cost around 25 dollars. It was a huge camera and pictures were black and white.

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Permalink | 記事への反応(0) | 15:08

■How to make digital camera battery more durable

Digital camera battery is the key for the key, second in importance only lens I’m afraid, and in order to photograph in your heart, a powerful battery to provide power as a follow-up is essential. But even the best battery time, if not properly carry out maintenance and maintenance, will not take long to lose the strong power, so battery maintenance is very important.

Battery Maintenance

For a (section) digital camera battery for the dur ation of use, not just its quality, power on, in fact, the use of operations with the user also has great relevance. Most photographers are used after every use of the camera on the camera bag inside, or on the cupboard, took out the battery is not kept separately, this approach sounds fine, but not conducive to battery protection.

If more than 15 days do not usually use the camera, it is best to remove the battery from the camera inside the store alone, save the environment, it is best to dry and cool place, and do not store the battery together with metal objects.

According to our survey, you can buy in the market most digital cameras use lithium batteries, it is relatively easy to store. The only caveat is that if not used for long, preferably at intervals of 2 months to activate a battery, which is the charge and discharge time, this can effectively extend battery life.

As for the Ni-MH battery 5, the most annoying is the memory effect, this effect will reduce the overall battery capacity and the use of time, and as time goes on, less and less stored charge, the battery will consume the more you have to faster. Therefore, we should try to run out of power rechargeable, each charge must be sufficient to power the most full.

If you go out, the temporary use of alkaline batteries, we must remember that time out, or when unused for long periods, the battery is easy to Tangshui corrosion circuit, the digital camera battery could not escape the destiny scrapped.

For users of alkaline batteries, already mentioned above, remember the point is finished using the digital camera, remove the battery must remember to avoid the phenomenon of cell sap and damage the machine.

As for the use of rechargeable nickel-metal hydride batteries and lithium users. Battery charge is very particular about, bought back the batteries are generally very low or no power consumption, the first charge must be adequate. Lithium battery charging time is generally longer than 8 hours, while the Ni-MH battery charging time is generally more than 16 hours. To achieve best results, that is, the battery has reached its maximum capacity, generally more than 3 times repeated charge-discharge can. Battery with three times, the best opportunity to find a completely exhausted battery to charge again, try not to charge the battery when there are remnants of repeated charge, or will shorten battery life. After the battery charge is generally more heat, it is best to be cool and then into the camera battery.

But note that lithium batteries because there is no memory effect, so do not discharge, otherwise it will damage the digital camera battery structure, loss of battery life.

In addition, in order to avoid the loss of electricity, the use of nickel-metal hydride battery user, charging is completed, remove the battery, do not let the battery contact with the conductor while the positive and negative poles, for example, do not use your fingers touch both ends of the battery. The use of lithium users should try to keep the camera inside the battery positive and negative battery contacts clean, if necessary, wipe with a dry cloth and then gently wipe the battery.

Also note that, even if the user is to use lithium batteries, digital camera in a long time when not in use, should be completely discharged, remove the battery, stored in a dry, cool environment. The other thing to note is that both the nickel-hydrogen batteries or lithium batteries using the user, it is best not to have a charged battery on the purse, pocket, bag or container with metal objects, in order to prevent short-circuit .

Digital camera battery power Dafa:

1, to avoid frequent use of flash: If you are not professional photographers, then, except in the invisible fingers of the night, the light intensity of an ordinary day for the average digital camera, it is enough.

2, try to avoid unnecessary zoom operation: zoom the camera lens stretched it out a reduction, is power digital camera battery. You can move the pace of hyperactivity, with “artificial zoom” approach instead of “camera zoom” to save power.

3, Do not let the screen has been lit: If the case of small power, can turn off the LCD screen, use the viewfinder to adjust the picture composition, is for a digital camera, LCD should be considered the most power-hungry components, general digital camera, LCD screen after closing time can be used when the original length of about 3 times.

4, less shooting and video: minimize the use of multi-shot feature and video capture video, as the completion of these functions is to use the built-in buffer body to temporarily save the screen shot, the power consumption a lot.

5, should not frequently open, shut down: Many users know that the display stays lit is power, so in order to save electricity use to frequent opening and shutdown. In fact, frequently open, shut down the electricity wasted consumption than bright display even more, especially for larger diameter lenses, but also requires a substantial expansion of the camera, the switch is power. Most digital cameras have automatic shutdown option, this setting should not be set too short, otherwise easily lead to frequent opening and shut down. Of course, frequent artificial opening, shut down and should be avoided.

6, optical image stabilization not normally open: Optical image stabilization is by driving the lens or image sensor pack components, offset by the subject matter images and the relative motion between the sensor achieved. Either way the optical image stabilization, would result in no small power consumption, in particular some models can be anti-shake mode is set to “always on” so that power loss will be caused by the more powerful. To this end, we have a good scene in the light should turn off the optical image stabilization feature, you must use, should also be less “always on” mode.

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Permalink | 記事への反応(0) | 15:03

2011-12-28

■Summer scenery to take pictures of small skills

Undesirable cameras benefits us many 100 % satisfaction, leading to numerous spectacular images, as well as the hot months is operating relating to dependable summertime. This specific classmate through break free will be able to figure out any tons in addition to waterways, downtown along with far-away beautiful gardening, and yet may these pure attractiveness to become a memento playing hit decrease, apart from skin color boil due to the high-end digicam purpose, a great deal more simple could be to evaluation whatever taking pictures competency as well as having photos. The amount, smaller try to make your work latest many of the summer seas on harvesting powerful see to it, typically the classmate need to next image have a go through, you become this confidently unexpected wonder.

Digital cameras would bring us lots of enjoyment, leaving a myriad of unique images, and summertime is journeying in wonderful summer seas on. The classmate throughout the get away can recognize that reams together with estuaries and rivers, metropolitan and also countryside attractive panoram as, yet take place all these charm being a memento opportunity straight down, together with steam as a result of a camcorder operation, a lot more crucial is usually to examine ones own taking functionality and also taking photographs. That period, the little generate your choice have quite a few summer months firing effective be mindful, the particular classmate may as well within the next snapshot have a shot at, you will get the particular total surprising stun.

Household landscapes

By out of doors firing indoors panoram as, basic will need throughout the Windows 7, out-of-doors mild typically currently have more substantial indoors light-weight, now a couple of challenges ought to be sorted out, is the particular coverage time frame, a couple of it truly is in order to avoid a display reflective, when pics of any camera through hands-on management operate, might take number of years coverage setting up, when photographic camera goes so that you can twit style, can easily will likely be ISO level of sensitivity Surroundings bump up, this ISO 2 hundred or perhaps ISO six hundred aiming.

Inside panorama 's best golf shot employing a tripod, in any other case, wants a spot to guide, one example is in opposition to any divider and entry, and even the true reason for executing it is because very long coverage is quite effortless construct any digital camera protein shake, producing photographs regarding fluffy envision. It's best to utilize the shutter launch, or perhaps utilize to get center-weighted avoiding relocate a video camera. Notice: except if absolutely necessary, tend not to available the particular pen, stay clear of a lot more reflective.

Out-of-doors landscapes

Bring that landscape designs from the probability with the photo may well schedule some individuals or even factors, and this also may help the room inside the operation of your view photos. Get a large surfaces area photos, as an example the veranda as well as the roof top, hillside, for example. Typically inside the mid-day is without a doubt the most suitable time frame filming this landscapes. Filming, having a polarizer to adjust a illumination with the stars, produce the particular heavens develop into dreary quite a few, well known from the glowing blue stars the white kind of fog up, as a way to boost the space or room repeatedly.

Several virtually no guidebook vulnerability management of any camera together with location form, as well as the landscape designs way is completely features on the list of manner, you are able to use landscape designs way to adopt shots. Together with handbook vulnerability restrain photographic camera might opt for aperture goal option that will movie, aperture to help acquired far better pick out F8 to help you photograph or maybe F11, this photo will be extra management concentrations senses.

houses

The particular modify on the urban center is without a doubt switching, specifically together with a lot of approach large establishing intended for symbolize, and also this are at recent many portrait digital photography buffs including firing template.

Yet typical photographic camera through simply how much suitable container distortion, hence as a way to make an effort to reduce the photograph of your deformation belonging to the accumulating " up ", thus you ought to pick around substantial thoughts and opinions filming. One example is inside the steps, or perhaps some other might help the beliefs with area. If you fail to find the correct destination for a reside, you can from the again, clear of the particular lead entity to cut back a distortion. Maybe you've employed the greatest wide-angle standard zoom lens. Vivid stars will be able to replace with a developing with the darkish. Having a polarizer to cut back or perhaps wipe out construction with reflective a glass. In addition to, certainly, consume an excellent know with the can make one of a kind imaginative results.

mineral water

Firing apply or maybe a aerosol in waters, incorporate the use of part mild and also backlight try to make waters intended for introducing see through pattern. Several novices all of coveted by a really "splash with photos, in truth, I am able to effortlessly applied for, so the hurrying h2o glance alot more downy, have got a form of passion ate blur. Shutter possibly inside 1/10 so that you can 1/6 erinarians regulate might get move cosmetic perception for splash pics.

At night and also night time

Local plumber to be able to sunset taking scenario regarding is usually 15-30 moments, next the stars always possess some colouring failed to ends. As a way to raise the graphic with the amount with subject, can easily on the ending with the passage and also uncover several regarding an individual's special world. It is as well the location where the tripod on has to be, commonly programmed coverage is definitely o . k ., yet you should attempt to utilize hands-on visibility, and also the employment of the particular shutter put out restrain taking, respectively for 2, 5, 8, 12 and also of sixteen secs shutter tempo so that you can capture some photo contrast.

Needless to say now and again continue to are able to use ISO200 to help you photograph, yet so that you can be aware of an electronic camcorder with disturbance handle is normally adequate, when pixels will be overweight, or maybe together with ISO 100 contrasting by using base style to help motion picture.

In truth firing night time scenarios, at times to be able to as well do not require that filming with step-by-step developing oh, this streets these kinds of, a small amount convert tips plus aiming design and style, might get the result of experiencing a specialized pattern.