Originally Posted by Canada_Rockies
All accessory lenses work the same - fixed distance from the front of the lens. Sorry to be a bummer for you! My best aquarium shots were with a 55/1.8 fitted with a rubber hood.
That does suck, but yes the rubber hood is a must have. I used a rubber plumbing coupler the first time I went, I think it was a 5" to 4" so it looked like a real hood.