arc200uk wrote:Mats,
I looked at your aquarium pictures some time ago and was really impressed. How do you take such good pictures?
I did take about 5 picture of the tank to get this one - although the one I finally chosee was actually the first attempt!
Camera: EOS 10D
Lens: EF 20-35/2.8L (@20mm)
No flash.
ISO: 1600
Shutter: 1/50
Aperture: 3.5
I don't know if I used tripod for this shot - I know I did for some of the later ones in the series - when I used lower ISO values.
The later attempts were at less sensitive ISO values (400 and 100), and they were seriously slow shutter speeds, and as you say, the fish mustn't be moving then...
Of course, for "tank shot", it doesn't matter too much if each individual fish isn't super sharp - as long as they aren't hiding what the actual tank looks like. Something like 1/30 or 1/20 would certainly work with the fish I've got. 1/3, like the ISO 100 ones, the fish are somewhat streaky across the glass, but not badly so.
Yellow colour is probably because the colour balance gets upset. You should be able to fix that in Photoshop (or other Photo Editor software) by setting the white-balance to somewhat bluer shade to compensate.
Out of focus close-ups is perhaps a limitation of the close-up range of the camera - for close-ups I use a 100mm Macro lens, which has a close-up limit of 30cm/1ft from the film/sensor-plane. It gets to 1:1, so one cm of subject is one cm on the film/sensor, and that's more than enough for anything but the tiniest of fish. Try taking a series of photos closer and closer to something, making a not of how close you can get and still have a sharp image. Of course, another problem with close-ups is that the depth of field [how far around the focus distance is still sharp] is abysmally small even at small apertures - so you need extra light and high ISO values here. Sometimes I use flash for the close-ups. Not for the bigger fish, but smaller ones, it works best to use flash... As long as the flash isn't too close to the lens, it's fine to flash into the tank - but clsoe to the lens and it'll reflect back off the glass, rather than off the fish...
Aquarium photo is NOT easy... There's lots of things that can go wrong...
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Mats