Similar sized, midlength prime to the 16-35

[surfer57]

So I'm wondering if anyone can recommend which prime lens would be close in length and no greater diameter than the 16-35 II. I'm looking at the 85mm 1.8, 100 2.0, and 135 2L. From the specs it looks like the 135 is closest but I'm not sure I want that much reach when shooting in the water. Anyone with the 100mm how much shorter is it really?

I don't want to buy a lens only to find out that it is too far from the port and will have focus issues.

 

[Loswr]

Does the maker of your port offer a compatibility list?

 

[surfer57]

I'm just winging it. He's a nice guy and all but I would imagine his suggestion would be a properly sized flat port. I had a port for my 10mm fisheye on my 30D housing and would use a 50mm and 24mm at will with no issues. May have to suck it up and but the right port.

 

[surfer57]

This is the housing by the way. I think the dome port is going to be an issue unless the front of the lens is close enough. O well 35mm will have to do for now.

 

[Loswr]

The specs and product image comparison tools (the latter for ring positions) could be helpful.

http://www.the-digital-picture.com/Reviews/Comparison-Tools.aspx

 

[Mt Spokane Photography]

While the lengths of the 16-35 and the 135 L are close, the position and diameter of the focus ring is different. You might borrow or rent one before taking the plunge.