looking for underwater housing for my canon 5D mk II and I have a 35mm 1.4 that i would be using underwater .. does these water cases come with adjustments for different lenses or do you have to buy those seperately and if so where?
No, the focusing setup on it works only with a 15-35mm lens. I don't know about whether or not others are available, but I do know that the focusing and zoom rig only works with a 16-35mm lens.
Also, please note that this is a underwater video rig. It's not all that user-friendly if you want to use it for stills or any type of underwater action shooting. It gives you limited access to only some buttons on your 5D MKII.
It's fine if you're looking to shoot underwater video, but I would choose something else if you're looking to shoot stills.
But, the good part is that it is a very beefy rig. I had 100% faith that this thing isn't going to leak as long as I installed the o-rings properly.