[cambridge640]

師兄s

用 IS 鏡頭時，
如快門在 安全快門以上很多時，
關閉 IS 是否會令相片 sharp D？
(我時常見師兄們 D 相 放大100% 時，都很 sharp 的)

我也在想，
為何 落腳架時，建議 關 IS？
時否意味著，
IS 在安全快門以下時，可發揮其作用，
但在快門不成問題時，
IS 則起不到作用，甚至可能會稍微影響相片的 sharp 度！

有無師兄可以俾 D 意見？

[el136a]

不排除有這可能性，始終IS組件是浮動的，所以我個人來講，如果不是長焦大炮，最好唔好有IS，但我知有很多師兄應爲IS是萬能，2470，1635呢一類型的焦段有IS先稱得上是完美！睇到我O晒咀！

[el136a]

IS除可以降低所謂的安全快門之外，其中一個最大意義是拖慢/穩定VF內影像！

[weijieliu]

怎樣才能查清楚IS是否正常運作呢﹐ 因它不象AF和MF可以在屏幕上顯示出來。

[el136a]

開IS和關IS下擺鏡，你會感覺分別很大，IS運作時影像會有拖慢的感覺！

[cambridge640]

我就是考慮到 el136a 兄 所提及的 "始終 IS 組件是浮動的"
故在快門完全沒有問題下，
可能 關了IS，令組件不處於浮動，
相片的 sharpness 可能會比 開 IS 好！

[el136a]

Off IS後不代表IS完全不浮動！IS關後是沒有硬件鎖死固定浮動組件，IS組件還處於浮動狀態，物理上震盪（如反光鏡震動）可能會擺動組件另影像模湖！所以我好反對200mm以下鏡頭設有IS！

[Obi-Wan]

have time go see see
http://www.kenrockwell.com/tech/image-stabilization.htm

[cambridge640]

So should we keep the IS always on ?

[Obi-Wan]

If your IS lens is produced in recent years, e.g. EFS-IS lenses, YES

[cambridge640]

Thanks for your advise. !!!

[reflexboy]

Quote<<<<<<If your IS lens is produced in recent years, e.g. EFS-IS lenses, YES>>>>>>

How recent and what's the mechanical difference between the "recent" and "anicent" Canon IS system?

That's indeed an "interesting" article that written by a newbie!

Quote<<<<<<<<<<<<<I usually turn off VR on a tripod; it's not needed. If I leave it on, I've never seen a problem either.>>>>>>>>

He has never seen a problem! Does it mean there is no problem at all?
Just ask some c hings
here and see if problem really doesn't exist in that case?

Quote<<<<<<<<<<<<<Many VR systems are smart enough to figure out if you're on a sturdy tripod and deactivate themselves;.>>>>>>>>>

That's what I said! Newbie!