QUOTE(nicotine @ Aug 13 2008, 10:39 PM)
hi sifu i use AV mode to take those shot. shutter speed is automated...Â

perhaps u could give me a point or 2 for taking macro shots.
i tired M mode but when i jack up the aperture to F32, picture come out totally black if i wunna use fast shutter speeed.
it's pretty fine to have 20+ sec. since your subject is not moving
however, mine cannot have 20+ sec. as i need to freeze motion
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you need more lights for that small of aperture or your shutter will have to be slower. U can achieve faster shutter by having higher ISO or more lights/flash. In my case i have use a flash.
I do agree with you that u should not be using f2.8 as I found macro to have shallow DOF due to it's long focal length (90mm/100mm). As such, I'll need smaller aperture like 7.1 and above to get my subject sharp.
This post has been edited by vincent_audio: Aug 14 2008, 01:37 AM