CP 950 with step up rings?

Has anyone used a Coolpix 950 (or similar) with a series of step up

rings on the 28mm threaded lens? For instance, I may try the 28-37

step-up ring with a 37-58 step-up ring on top in order to try some

infrared with my existing hoya 58mm filter (and polarizer also). I

know B+W makes a 37mm, but don't really want to spend the $60 for

it. I've searched here and the "digital infrared" at yahoo groups,

but couldnt find any specifics regarding vignetting. If you've used

a setup similar to this, would appreciate your thoughts re vignetting

or not at the wide end. My simple hand sketching says "no"

I have used a 28-37 and 37-58 stacked with a normal thickness polarizer on my Coolpix 4500 and never had a problem with vignetting. I might add that the 28-37 is rather thick in the center. I think I paid about $7 each for the plastic step rings.

Stan

Stan, thanks. Since I posted this, I've found a 28mm 89B filter at Harrison, which will enable me to shoot with the fisheye and wide angle also.