okay.....
im no expert but hes some steps to take pictures of betta/or any fish
1. Buy a camera. Mine is 5 Megapixils or something it works fine 150 bucks at walmart.
2. When taking pictures dont take a picture of a fish in bad lighting. use the whitest light not a incandesent.
3. dont take the picture straight on if you use a flash. If you do use a flash take the picture at a angle. THis way the flash doesnt blind your camera. i recomend you use he flash.
4. use a the cameras macro setting.
5. Use the highest quality picture your camera will let you. if you dont have a memory card then you will just have to take 4 pics at a time and load them into you computer. but since you are waising nothing doing this take 100 pictues and delete the ones you want. Rechargable batteries help alot!
6. I use 400 ISo, thats the highest my camera goes, more expensive ones probably go higher.
7. use a tripod to keep the camera steady.
8.use the timer. this will cut down on blue from the shutter speed. my camera does not have a setting for this but i think some do.
9. clean your glass!!! both sides.
with bettas - use a mirror to keep the fish flaing where you want to take the pic.
anything else i forgot? synirr? you take really good pics whats you secret?