[reflexboy]

究竟兩枝同廠同一焦距O既鏡頭. 有IS同無IS o係光學質素上會唔會有分別? 同埋CANON O既IS鏡原理係點?

[calwkf]

質數上當然會有分別, 因為鏡片排列同組合唔同嘛~

原理︰
http://www.usa.canon.com/consumer/controller?act=CanonAdvantageTopicDtlAct&id=2646

[uubb]

But IS is much more convenient and practical for daily use, unless you always bring a camera stand or work in a studio.

[Obi-Wan]

平均質素：
我朋友支小小白IS
> 我支小白IS > 我支小白 > 我支小小白
一定有分別，但唔明顯，唔信去我profile 睇吓一個小比較
如果不求大光圈淺景深，小小白IS 真係最正！
冇$亦可買小小白
因為小白太重啦！

[calwkf]

只果用小小白同小小白is做比較, 睇返報告就應該係小小白is會好小小~

http://the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?CameraComp=0&FLIComp=0&APIComp=0&Lens=404&Camera=9&Sample=0&FLI=0&API=0&LensComp=104

[reflexboy]

但我自己就覺得講無is o果枝出o黎o既野靚d. 特別o係色散問題上, 有is遠比無is嚴重.
早排亦拜訪過canon sc, 問佢呢個問題, 佢地亦全無隱瞞o甘話早期剛剛出is o既鏡的確係無o甘好, 問題係出o係o果組is鏡組! 但依家應該好好多!而我自己亦坦白對佢地講, 我o既睇法並唔同佢地o既一樣!

[jacmissu]

小小白有 is 同無is ..個防震係咪真係差好遠呢 ?
如果我只係在白天的情況下才用, 無 is 應該都ok 嘛 ?

[reflexboy]

我唔強加我自己個睇法o係你個case道, canon道有鏡畀你即場試, 自己比較後再決定啦!

[Obi-Wan]

jacmissu
"如果我只係在白天的情況下才用, 無 is 應該都ok 嘛 ? " depends on whether u want to enlarge the photo. If for 4R, ok

For sharp photo for enlargement 8R, always use 1-2 stop faster than the "safe shutter speed", for APS-C CANON without IS, the "safe shutter speed" is 1.6*200 = 320 for 200mm. I would use 1/320 s for min., but for getting sharper handheld photo, I should use 1/640 to 1/1280 without IS. U may have to use high ISO to get this result.

one more remark: Many of my Japanese friends do not use IS lenses ----- as they mainly use tripod all the time, then 無 IS都ok

[reflexboy]

"For sharp photo for enlargement 8R, always use 1-2 stop faster than the "safe shutter speed", for APS-C CANON without IS, the "safe shutter speed" is 1.6*200 = 320 for 200mm. I would use 1/320 s for min., but for getting sharper handheld photo, I should use 1/640 to 1/1280 without IS. U may have to use high ISO to get this result."

有croping factor o既機影野會tele o左? 其實係影o既野拉近o左定係影少o左?

[jsklee]

有croping factor o既機影野會tele o左? yes

其實係影o既野拉近o左 - no

定係影少o左? yes

[jsklee]

"其實係影o既野拉近o左 - no"

because the object distance is unchanged.

[steven_wong837]

我用過小小白有is同無is..日光下我覺得無is sharp少少

[wesleyyau]

會唔會大家見到o既分別係支鏡新出d... d coating 同其他方面o既改良導致有更佳效果而唔係單因為有is 冇is呢? :p

[tak_0818]

對比四支鏡,小小白is係最好??????