可以請先進解釋一下能夠從觀景窗看到IS/VR的動作有何攝影使用上的優勢嗎?
小弟的認知是不管IS,VR或是AS都是設計來補償相機曝光時的振動,實在想不出可以從觀景窗看到IS/VR的動作有什麼優點,可以請有用過IS/VR的先進以實際使用的例子幫小弟解惑嗎?一定還有人也對此好奇的.先謝謝了...^_^

應該換個角度想
假如真的有500 F8 IS，多個IS功能會是多少錢?體積會多大?
又像上面您說的情況，屬偶然碰上，
您的朋友假如沒帶有IS功能的鏡頭，
您不就大贏特贏了。

當然這方面Minolta在應用上還是有了些缺點，不過
Minolta應該也有意識到此缺點，
小弟70)發言提到的
http://www.photosharp.com.tw/forum2003/topic/topic.asp?forum_id=27&code=20040914000065&fPage=&page=4
觀景窗內四邊液晶資訊顯示攔中的右側
會同步顯示目前手振程度狀態
http://konicaminolta.jp/products/consumer/digital_camera/a-7digital/img/02_pict003.jpg
可參考此指標在手振程度狀態最低時按下快門即可改善此問題。

Interesting! Many people click in to read for just 5 pages but few of them post or respond.

Dusknest,

If someone has shaking hands like what you mention, no IS/VR/AS function can compensate. ;)

Z1 is another class of animal because of its light weight. & digital zoom degrades the image clarity on your EVF too.

My D7 + VC7 with 500RF has no AS yet & it is light compared with non-RF design. It"still "much" heavier than the Z1.

But you won"t lose your target due to hand-shake even during motion tracking.

Narrow field of view is the reason of losing target like birds that I"ve experienced under broad daylight. However, it has nothing to do with AS/VR/IS.

I put my camera down & find out the target & follow again. It works for me this way.

Actually, when your lens is panning or in motion against your subject, the feeling of shaking viewfinder is not as significant as static holding. Because your attention is on your subject.

And 7D body is much heavy than D7 (almost double) that enhances stability too.

U don"t even have the camera on your hand. Why u said u can"t focus. Weird!

Ducknest,

You seem to lose track of my idea.

The reason of target loss is "narrow field of view" BUT NOT hand shake of the photographer.

If someone"s hands are shaking so much (when one hand supporting the lens, another to fire shutter), IS/VR/AS can never compensate.

AND

If the photographer doesn"t practise how to handhold a tele lens, he won"t be able to any sharp photos even with AS body or IS/VR lens.


It"s "very very rare" for anyone to handhold a 1200mm. Pls think about how heavy & large it is! How long can you hold it? It must be on a solid monopod/tripod except you"re taking it home.

Also even stabilize a long tele 1200mm on tripod requiring special technique.

IS system will help you to keep your target in the narrow field, from your view finder, you will have a better idea, what will you get when you press the release button. In the IS system, you can see the object is move slower than in AS system, it will help you to adjust thing. As i menction befire, it will vary from lens to lens. But still, the longer the lens is, the more obvious effect will be observeed

我拿A1試了試，它有個放大八倍的功能，也就是相當於1600mm(應該沒錯吧)
在沒開AS下，畫面是震得厲害，但也不至於到想拍眼睛卻拍成嘴巴的地步
個人認為握得穩完全不成問題

如果握得不穩，我想就算有is，用途也不大吧

"IS system will help you to keep your target in the narrow field"

It works to counter certain magnitude of erratic motion but hardly to the extend you mentioned.

"Slow down" is only a relative observation.
IS is compensating your own opposite/erratic motion but never your subject"s. And a jet still flies as fast as it should.

When your hands & subject are towards similar direction, NO such observation can be seen.

One can alway move the lens in opposite direction to enjoy the feeling of "slow-down" provided by IS. But I"m not going to do this.

The point is when your hands constantly shake in large magnitude & erratic direction. There is no system to help you out.

To 7D

Go To try An A1 you will understand What i am talking about