sil40sx
Member
To get good DOF you need to Close down the apature which means high ISO and slow shutter, that’s where the tripod comes in.
Yes, I agree, you need it for slower SS (shutter speed). Only time I use one is when I'm doing Long Exposure, like 2 minutes SS, like this one below. But for regular shots, I try to increase my SS to a safe speed (usually 200, but depends what lens I am using,. e.i., you can do 1:1 on focal lengths like 50mm, you can go down to 50 ss.), since going up to 1600-3200 ISO is a usable image if exposed correctly.
Also, if you're using flash, SS doesnt matter. Because it freezes the subject. (I know, it doent apply for our Aquarium photography though)
PS: even if you’re using tripod, when your subject moves, like a fish or polyps swinging around, you still get blurry subject, unless you have flash or 200+ SS
old pic:

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