I find it difficult to take a pic if the subject is behind a glass(e.g.like a fish in a fish tank).I find the the subject has too much glare(i know it is a silly one but having difficulty while taking a pic's of my Fish in my practice.).I am using a Kowa T.D.1 and the distance i am taking it is about 20feet it works well for other subjects but not behind a glass.:

.Has any one used a Kowa T.D.1 i need to know so many things that i am missing .Thanks guys & girls oh forgot Singhs.(ah).