colinbm Posted October 21, 2015 Share Posted October 21, 2015 Andover has some Surplus - Bandpass Filtershttps://www.andoverc...tm_medium=emailCol Link to comment
igoriginal Posted October 22, 2015 Share Posted October 22, 2015 Ok, yeah, I've got a spare $500 dollars (or more) to burn on one stinkin' filter at a time, just for the heck of it. NOT. :P That's why for the rest of us folks who are not millionaires ... we've got Ebay vendors under the names omegabob2 or bjomejag, who sell overstock / surplus filters for pennies on the dollar, compared to these corporate sites. :) (Interesting stuff, though. Thanks, Col.) Link to comment
colinbm Posted October 22, 2015 Author Share Posted October 22, 2015 Yeah Iggy, I have my eye out for some too, but Omega hasn't got one yet :-((I too haven't got desperate enough to place an order with Andover either.Col Link to comment
Andrea B. Posted October 22, 2015 Share Posted October 22, 2015 Those Andover filters are some fairly specialized, well-made filters. Most of them not really what we need for generic UV photography. But I have been looking for some narrow bandpass filters. I shudder to think how much I have invested in UV/IR filters. Currently holding 4 BaaderUs, 4 Baader UVIR-Cuts, and one each of PrecisionU, CopperU/CU+, AndreaU, UG11, UG5, UG1, Hoya340, Hoya 360, and Hoya 330. 5 BG filters of various types, 3 S8612s, 6 IR filters of various types, a set of 6 Baader colour filters. Plus assorted odds and ends like an old Venus filter, a little bitty 340AF15 and 293BP10.How did this happen? What does it all really mean?? Arrghhhh....... Link to comment
nfoto Posted October 22, 2015 Share Posted October 22, 2015 This implies you are willing to pursue a moving target whatever means it takes. Link to comment
igoriginal Posted October 22, 2015 Share Posted October 22, 2015 I use narrow-band filters with a 10-nanometer bandwidth (marked with "BP10", which proceeds the wavelength rating on the filter). BP10 seems to be more useful for constructing a "poor man's spectrometer" array for testing the UV-A transmission of lenses (Steve Smeed's "Sparticle" array) ... compared to a "BP2" filter ... which in my opinion becomes too narrow for such tests. (It would also require one to buy 4 to 5 times as many narrow-band filters to create a lens-testing array to cover the entire UV-A range). Thus, the net result is that not only would I be paying significantly more money, right out of the gate, for such filters ... but I would even quadruple or quintuple the spending to create a fully-covered UV-A testing array, given the BP2's very narrow bandwidth slice. Link to comment
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