[審判者‧月]

用微距鏡影野除左最近對焦距離短之外，同一般鏡有乜分別?
比一般鏡有咩缺點?成像會唔會差d?

[tam_dominic]

"微距鏡影野除左最近對焦距離短..."

==>微距鏡是指可影 實物與焦平面影像 一樣大小

同是微距鏡 : 50mm 比 180mm 最近對焦距離近得多.

[kingkonghk]

>>比一般鏡有咩缺點?

隊得太埋, 會阻住D光線

[since2000photo]

微距鏡一般較長較重光圈較大價錢較貴對焦較慢

鏡頭長了，自然較重
鏡頭長了，入光量小了，更難做大光圈
鏡頭長了重了光學原理覆雜了，自然較較貴
鏡片多了重了，對焦自然較慢

Canon 50mm f/2.5 280g - 63mm
http://www.canon.com.hk/tc/product/catalog/productItemDetails.do?categoryID=25&seriesID=48&prrfnbr=358

Canon 50mm f /1.8 130g - 41mm
http://www.canon.com.hk/tc/product/catalog/productItemDetails.do?categoryID=25&seriesID=10030&prrfnbr=339

Canon 100mm f /2 460g - 74mm
http://www.canon.com.hk/tc/product/catalog/productItemDetails.do?categoryID=25&seriesID=10030&prrfnbr=340

Canon 100mm f /2.8 580g - 118mm
http://www.canon.com.hk/tc/product/catalog/productItemDetails.do?categoryID=25&seriesID=48&prrfnbr=356

原則上，如果一支鏡不能對焦，只能設定"無限遠"基本上，每支鏡都可以短30%.

[proof_tse]

其實macro同micro有咩分別
thanks

[lokism3]

Marco lens:
"bigger image" will result from the better magnication; e.g. a 50mm marco lens would normally gives you a 1:2 life size, where a 100mm would gives 1:1. For normal lens, the magnication ratio is only 1: 0.XX; so, the images you get will look bigger with a marco lens. The closer min. focus distance is another advantage.

a marco lens will give you narrow DOF scale too; at the same time, a "flat" focus point design will be given on most marco lens. the narrow DOF is related with the flat focus point in some means.

Mirco lens / photography:
some guys may know that there is "mirco photography, it is a professtional / special interest. Medical / Natural scientists / Chemists would like to take pictures of some real small things, and some normal guys would use it as a creativity tool to see the world in a different point of view. In the manual focus lens era, Canon, Nikon, and Minlota had their own mirco photography solutions for non-professtional (I mean non-scientists here, not photographer), those lens worked with macro bellow. Furthermore, the scientists would apply double polarized light source in research use, it gives a "funny" view of any object.

[kentchoi]

成像利,影人就咪啦,咁利,想photo retouch?
如果想平試玩吓,買套kenko ext-tube 試吓,一套三個size.
因為中間無鏡片,所以唔會降低鏡頭質數.