I really like your light modeling on the corals. That will be my next goal for macro. Yours and what denvercherub posted is just perfect in my opinion.My advice for using a macro lens for tank photography:
Fit the lens hood, and hold that against the glass so you know you are absolutely parallel to the tank glass (anything other than parallel will cause distortion and massively reduce the quality of the image).
Use a fast enough shutter speed to avert any movement, or alternatively turn flow pumps off.
I prefer to manual focus, but my camera also notifies me when it's in focus with a green indicator even when on manual focus.
Try a series of f stops to see how much depth of field you want to achieve. Using your lens at f2.8 will give you a shallow depth of field, but hands you a faster shutter speed and lower ISO.
I use a Sigma 105mm lens and I use it for everything bar FTS - amazing bit of kit!
New camera body by Andy, on Flickr
Pink Hyacinthus Macro 11-1-17 by Andy, on Flickr
Ice Fire 1-4-15 by Andy, on Flickr
Blue Mille 1-4-15 by Andy, on Flickr
FFM 1-4-15 by Andy, on Flickr
Cirrhilabrus Exquisitus 5-1-17 by Andy, on Flickr
Pygoplites Diacanthus 26-2-17 by Andy, on Flickr
Paracheilinus mccoskeri by Andy, on Flickr
My advice for using a macro lens for tank photography:
Fit the lens hood, and hold that against the glass so you know you are absolutely parallel to the tank glass (anything other than parallel will cause distortion and massively reduce the quality of the image).
Use a fast enough shutter speed to avert any movement, or alternatively turn flow pumps off.
I prefer to manual focus, but my camera also notifies me when it's in focus with a green indicator even when on manual focus.
Try a series of f stops to see how much depth of field you want to achieve. Using your lens at f2.8 will give you a shallow depth of field, but hands you a faster shutter speed and lower ISO.
I use a Sigma 105mm lens and I use it for everything bar FTS - amazing bit of kit!
New camera body by Andy, on Flickr
Pink Hyacinthus Macro 11-1-17 by Andy, on Flickr
Ice Fire 1-4-15 by Andy, on Flickr
Blue Mille 1-4-15 by Andy, on Flickr
FFM 1-4-15 by Andy, on Flickr
Cirrhilabrus Exquisitus 5-1-17 by Andy, on Flickr
Pygoplites Diacanthus 26-2-17 by Andy, on Flickr
Paracheilinus mccoskeri by Andy, on Flickr