http://www.antonline.com/p_4248B001-GP_823771.htm?sID=GP and http://www.amazon.com/Ricoh-CX3-Digital-Optical-Black/dp/B0036DEERI are $350 consumer cameras that use back-illuminated CMOS sensors.

We just need to think about how the glass lenses reduce UV... could we swap for quartz or plastic lenses? Would that be too hard a modification to make? Would the build-in auto-focus just adapt to a new lens?

Hi! There is a know glass company out there named SCHOTT AG. Besides being a big player in that business they also have nice data sheets with lots of details at any optical filter. You find it under: http://www.schott.com/advanced_optics/german/download/schott_all_collection_datasheets_optical_glass_filter_october_2011.pdf

And then there is furthermore an older catalog with lots of information on filter. It is quite interesting and you can specify what kind of glass, plastic lens or filter you are looking for and narrow it down to finde something useful between the thousands of glass types on the market. You find this under: http://www.schott.com/advanced_optics/german/download/schott_optical_glass_filters_2009_en.pdf

Please let me know if this kind of information is useful to you - maybe attending 1 year the lectures on Technical Optics Engineering, Lighting and and 2 years on Precision Engineering can help.

Wow, awesome. Are there up-to-date price lists available? The Hoya 340 filter being only ~$30 is great.