I haven't hit the limit yet for my trusty A200. I'm wondering do you guys know what will happen when the shutter about to die? no respond of the shutter suddenly? Or it has some symptoms before it wants to die?

This post has been edited by flysheep: Mar 31 2011, 08:51 AM

LOL, true also. when it dies, just don't ask for repair and you have the chance to buy a NEW one with reason

some general rule of thumb.
The magnitude of the defocus or bokeh can be calculated by Focal length divide by the largest F number.

30/1.8 = 16.7
90/2.8 = 32.14

sp90 should have 'more' bokeh.

But still, your defocus magnitude is still depend on how far the background to your subject relative to the distance from your camera to the subject.

hope this helps