Adapting Video Camera to Microscope

Hi,

I have a Ricoh 108 video camera (circa 1991, but Hi8, so am happy

with it) that I want to use with a trinocular microscope (like the

kind pictured from eBay, here: http://cgi.ebay.com/aw-

cgi/eBayISAPI.dll?ViewItem&item=1161807894).

The video camera has a macro feature built-in, but the field is too

large (about 3 cm diagonally). Do you have advice on narrowing the

field to work with the C-Mount tube on the top of the microscope?

One option I am considering is the use of a Sony 45mm macro c-mount

lens (part #99-9906-22, according to the picture in eBay, here:

http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1610424897).

Do you have any idea if this will work?

Even if the optics line up OK there then is the problem of fitting

the 45mm macro lens onto my 46mm threads; do you where one might

order a 46mm (male) to 45mm (female) step-down ring (or maybe a

combination of rings to go from 46mm to 45mm)?

Thanks for any help/advice you can provide.

Best Regards,

Derek Riehl

408-285-5715