Divide by 1.6 crop factor. So 200mm -> 1/320 sec.

My experience is at the short end, I have no problem holding the camera stead for 1/f (f: focal length). But at the long end, I need to go 1/2f.

所有跟帖： 

• 对，忘了这个!谢谢提醒。你的1/2f就比较太严格点要么高ISO，要么买快 -U96- ♂ (0 bytes) () 12/12/2006 postreply 13:39:04

• 镜头，什么2.8的就都来了。 -U96- ♂ (0 bytes) () 12/12/2006 postreply 13:39:44

• Or 1.8, like the Canon 200mm f/1.8. -pieq314- ♀ (0 bytes) () 12/12/2006 postreply 15:53:55