10d - underwater lenses

I have a Canon 10D and a canon 17-40 4.0 zoom.

I am about to order a housing and port system and have some doubts about whether the 17-40 is good underwater. IS this lense a good underwater lense. What would be better for WA.

I have not done alot of macro shooting but was concidering a 100MM Canon lense. Is this a good lense for Macro or would a 50MM lense be better? It occurred to me I would not want to be too far away from my subject as I shoot in cold water near Vancouver island and the water is not always clear.

Any help you can offer would be appreciated.

The 17-40mm is a decent underwater lens, but not the best.

A lot of Canon users here on Wetpixel like the Sigma 15mm and also the Canon 100m. But I think that you make a good point that the 50mm might be better in your conditions.

Alex

The Sigma is peferred over the canon version?

Given the vis we get in local waters (yes, I dive in BC as well...with a 10D), you might be better served with a wider lens like the 15mm Fisheye...either by Sigma or Canon. Optically, I doubt anyone could tell the difference between the 2 lenses.

The 17-40L would be a nice critter lens especially for the large ling cods and plumose anemones as well as seals and octopus. I've gotten great shots of the giant orange nudibranchs with my 16-35L.

For macro, we don't really have teeny tiny critters except for the candy stripe shrimp...for those a 100 macro is preferred but you get really good results and a broader selection of critters to capture...say grunt sculpins with the 50 macro.

My favorite underwater lens at the moment is the EF28-105 zoom. With that lens, I can easily get decent shots anywhere from Lingcod size down to larger Nudi's.

My 2 cents.

stu

Thanks scubaastu, what housing do you have the 10D in?

It's a Subal C10.

s.