[轉錄]Micro? Macro? Closed-Up?

※ [本文轉錄自 sometimes 信箱]

標題: 名詞釋疑: Micro? Macro? Closed-Up?

※轉載自交大資工PHOTO版精華區, 經 sometimes 編排※
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發信人: [e-mail] (js), 信區: photo
標  題: Re: 名詞一問
發信站: 中央資管龍貓資訊天地 (Tue Jul 11 00:02:37 1995)

==> 發信人: [e-mail] (Emon Wu), 信區: Photo
: 在鏡頭中有所謂
:       Micro
:       Macro
:       Close-up
: 好像都有放大的作用,到底它們之間有何差異?
: 我想拍一些昆蟲,鳥類的特寫,需加上什麼鏡片比較好.

底片成像的實長大於實物叫micro, 平常少有如此, 最多到1:1, 故稱為macro.

Close-up其實是動作, 「近攝」是也。

有一種簡單的放大鏡片, 直接加在鏡頭之前, 可在底片上形成較大的影像,
但解析度惡化。

另外有延伸環或蛇腹, 加在鏡頭和機身之間, 效果不差。
(Nikon 55mm macro本身只到1:2, 加上pk-13的extension ring, 可到1:1)

高中物理的成像公式說:

1/鏡頭焦聚  =  1/物距   +    1/像距

所以就一個固定焦聚鏡頭而言,
延伸環加大了像距(鏡心至底片), 物距就必須變小,
就close-up啦!


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發信人: [e-mail] (kylie), 信區: photo
標  題: Re: 名詞一問
發信站: 台大計中椰林風情站 (Tue Jul 11 19:46:25 1995)

==> [e-mail] (Emon Wu) 提到:
> 在鏡頭中有所謂
> Micro
> Macro
  ^^^^^
    These two words are the same except different pronunciation.
    (Nikon use "micro")

> Close-up
  ^^^^^^^
    This is like filter. They can be used like filter on your lens.

> 好像都有放大的作用,到底它們之間有何差異?
   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  Generally speaking, micro(macro) lens are designd for close-up photography.
   Their optical quality are better than other normal lens which is attached
   with extension ring. But their prices are alos higher than normal ones.

  Close-up lens(also called supplementary lens):
   1. Advantages: cheap, easy portability. No exposure changed.
   2. Disadvantage: loss of optical quality.

> 我想拍一些昆蟲,鳥類的特寫,需加上什麼鏡片比較好.
   ^^^^^^^^^^^^^
      If you have enough money, micro/macro is an excellent choice.


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發信人: [e-mail] (冬天的太陽), 信區: photo
標  題: Re: 名詞一問
發信站: 交大資科_BBS (Wed Jul 12 13:31:35 1995)

==>[作者]: [e-mail](js) 在 photo 討論區中提到:
> 底片成像的實長大於實物叫micro, 平常少有如此, 最多到1:1, 故稱為macro.
> Close-up其實是動作, 「近攝」是也。有一種簡單的放大鏡片, 直接加在鏡頭之前,
> 可在底片上形成較大的影像, 但解析度惡化。
> 另外有延伸環或蛇腹, 加在鏡頭和機身之間, 效果不差。(Nikon 55mm macro
> 本身只到1:2, 加上pk-13的extension ring, 可到1:1) 高中物理的成像公式說:
> 1/鏡頭焦聚  =  1/物距   +    1/像距
> 所以就一個固定焦聚鏡頭而言, 延伸環加大了像距(鏡心至底片), 物距就必須變小,
> 就close-up啦!

There is one easy method to tack picture with > 1:1 magnification.
Buy a reverse ring, and then reversibly mount a 24mm, 35mm, or 50mm lens
on your body. For examply,

50mm + BR2A --> 1.1X
35mm + BR2A --> 1.7X
24mm + BR2A --> 2.5x
24mm + BR2A + PK13  --> 4.0x
24mm + BR2A + PK13 + TC14A  --> 5.6x

Note: BR2A is a reversing ring.
Only stop-down metering is used.


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發信人: [e-mail] (冬天的太陽), 信區: photo
標  題: Re: 名詞一問
發信站: 交大資科_BBS (Sat Jul 15 16:22:16 1995)

==>[作者]: [e-mail](js) 在 photo 討論區中提到:
> ==> 發信人: [e-mail] (冬天的太陽), 信區: Photo
> : There is one easy method to tack picture with > 1:1 magnification.
> : Buy a reverse ring, and then reversibly mount a 24mm, 35mm, or 50mm lens
> : on your body. For examply,
> : 50mm + BR2A --> 1.1X
> : 35mm + BR2A --> 1.7X
> : 24mm + BR2A --> 2.5x
> : 24mm + BR2A + PK13  --> 4.0x
> : 24mm + BR2A + PK13 + TC14A  --> 5.6x
> : Note: BR2A is a reversing ring.
> : Only stop-down metering is used.
> I know this technique of reversing lense but never tried before.
> How is the outcome? What is its theoretical background?

I haven't study any optical theory about the camera lens.
Probably, you should find people who is major in physics
to give you a correct answer.

Cause you can use only stop-down metering, you can not shot
moving object easily. You need a flash light to stop the
movment and increase the depth of field. The problem of
stop-down metering is that you need DOF and you choose
smaller aperture like f16 or f22, but it's too dark to see any thing.
You have to focus the object by opening the aperture to f8 or 5.6,
and than stop it to f22 to tack picture. Probably, the moving
object is out of focus before you stop the aperture to small one.

Although there is an adapter ring can solve part of this problem.
You need a double head cable release and mount the adapter ring
on the tail of the reversed ring. The aperture can only be closed down
as soon as you triger the shutter. However, you still lose
open aperture metering.....

Macro photograph will take more time and need more patient than
other works.


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發信人: [e-mail], 信區: photo
標  題: Re: macro和micro的差別
發信站: Independent Federation of Chinese Stude (Fri Dec  5 18:18:48 1997)
Origin: c26line7.macau.ctm.net

On 03 Dec 1997 09:51:31 GMT, [e-mail]
(該怎樣就怎樣吧....) wrote:
>     陳大哥   Nikon有出Macro的鏡頭唷....
>              我的一隻最早的鏡頭,35~70mm f3.3~4.5
>              就是Macro的巨像鏡頭唷....
>              Canon我就不曉得了...:p

如果把 Zoom 的鏡頭上的 Macro 功能也算是 Macro 鏡頭的話, Nikkor 倒是挺多的,
不過為何 Nikon 不把這些鏡頭上 Macro 的功能直接稱為 Micro 呢 :)

Macro 跟 Micro , 嚴格來說可以是兩件事 ,
不過對於市面上一般最大還原倍率是 1:1 的鏡頭來說 ,
把它們混為一談 , 也並無不何 ,

難道 AF Micro Nikkor 105/2.8 跟 Canon EF 100/2.8 Macro 的微距性能是不一樣乎.:)

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