im loving the extreme closeups!!
what lens are you using?
i just asked jroovers the same question..
Thanks for comments !
100mm macro lens (pentax)
but lasts pics were without tripod and iso 400...
I believe to get clearer closeups I should use a tripod and lower the iso to 100...
Tripod will help with clearer shots, if those are hand held scary to think what the tripod shots will look like! Depending on your lighting, I don't think lowering the ISO down to 100 is going to make much difference in the sharpness in your shots - in fact, I'd keep the 400 ISO as it will allow you to use a relatively faster shutter speed and do a better job of freezing the action (as opposed to ISO 100, which will require a slower shutter speed). This is assuming a constant aperture.
Terrific pictures, either way you are already doing something more than right!
I cheat with a sunshield like this :
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to stabilise the camera on the glass of the aquarium ;-)
also keeps me perpendicular to the glass !
Jordan do you sharpen your pics afterward ? I just use iphoto (mac) to adjust brightness and white balance.