I was wondering if anybody has used a color correcting filter sandwiched between the housing and a wide-angle lens. It seems a good option but I'm worried this increases the distance between the camera lens and the wide angle lens and may have some effects on focal length and posibly vignetting. I would appreciate feedback if this has worked for anybody here. I'm using a Sony camcorder inside an Ikelite housing and an Inon UWL-100 lens.
Thanks!!!
Mario