So I've got a Canon 40D, 10-22mm lens, and a sigma 150mm macro, and I'd like to start taking them underwater with me.
I gather I'll need a housing, #6870.50, and I'm probably going for a DS160 strobe, then the ports are a bit more complicated.
For the 150mm I've found out that the #5505.5 port should fit and that there's also a combination of pieces in the modular system that will work, but neither arrangement would give me manual focus. I'm guessing that this is because the lens is fairly fat, 3.1 in. X 5.4 in., and there aren't any focus gears that will work in the existing port system, but I'd love to hear it confirmed that it won't work with any of the "flat ports w/focus" like a #5506.5, before I buy. Never having actually handled the mechanisms, I don't know how exactly they'd work (or not work)
Lastly, the 10-22mm. I guess the 5503.5 dome seems to be the obvious choice, but I'm just not sure on this one, and would love some confirmation, since the optics of dome ports seem quite complicated, and I'm not sure a +2 or +4 dioptre is in the cards for that particular lens (vignetting and cost issues)
Thanks!
:Edit: Just remembered, I noticed the temperature rating of the housing is between 4 and 32c, I'm hoping to be headed south to warmer climes, but in the immediate future my dives will be in a canadian lake that's hovering around 4c right now, what are the concerns at these low temperatures? Battery life? Temperature stress if rapidly cooled? Brittle plastic? O-ring shrinkage?
I gather I'll need a housing, #6870.50, and I'm probably going for a DS160 strobe, then the ports are a bit more complicated.
For the 150mm I've found out that the #5505.5 port should fit and that there's also a combination of pieces in the modular system that will work, but neither arrangement would give me manual focus. I'm guessing that this is because the lens is fairly fat, 3.1 in. X 5.4 in., and there aren't any focus gears that will work in the existing port system, but I'd love to hear it confirmed that it won't work with any of the "flat ports w/focus" like a #5506.5, before I buy. Never having actually handled the mechanisms, I don't know how exactly they'd work (or not work)
Lastly, the 10-22mm. I guess the 5503.5 dome seems to be the obvious choice, but I'm just not sure on this one, and would love some confirmation, since the optics of dome ports seem quite complicated, and I'm not sure a +2 or +4 dioptre is in the cards for that particular lens (vignetting and cost issues)
Thanks!
:Edit: Just remembered, I noticed the temperature rating of the housing is between 4 and 32c, I'm hoping to be headed south to warmer climes, but in the immediate future my dives will be in a canadian lake that's hovering around 4c right now, what are the concerns at these low temperatures? Battery life? Temperature stress if rapidly cooled? Brittle plastic? O-ring shrinkage?