Source for UBVRI filters?

I've been looking for a good quality set of Bessel filters for
photometry and accurate colour imaging. I want the full UBVRI set as
my CCD (SXV-H9) has a reasonable QE across this range. I know I'm
being optimistic with the U end, but I'd like to try it out anyway.

I found a UK supplier offering a 32mm set for £360 (~$600) but they're
held in plain aluminium rings – no threads!! The supplier will
customise but this adds to the cost so I'm still looking for
solutions.

I want to fit these into a True Tech filter wheel with a five hole
carrier that takes the usual threaded filters (e.g. Astronomics O-III
or H-II). Can a "threadless" filter be fitted to this with adapters or
holders of some kind? If so, where can I get them (a UK source is
preferred but not essential)?

Alternatively, can anyone recommend any source of good quality UBVRI
filters that are "ready-threaded" and around the same price or less?
Past advice in the archives is getting a bit dated and it's a tough
search on Google…

Thanks
Beats

(justbeats) wrote in message om...
snip [C]an anyone recommend any source of good quality UBVRI
filters . . . .

I happened to be surfing for links on these a few days ago. I haven't
actually bought any of these products -

http://www.sbig.com/sbwhtmls/online.htm (under Accessories)

http://www.optecinc.com/astronomy/products/filters.html

http://www.andcorp.com/web_store/UBVRI/UBVRI.html

- Canopus