Anyone want some free IR filters?

[bvf]

I bought a job-lot of filters on ebay for the princely sum of £5 + £3 postage, hoping to find some useful UV stuff. Unfortunately they were all NIR or far-red, and many were only 12.5mm diameter. And there were many duplicates of the 25mm ones.

 

Anyway, I'll keep one of each of the 25mm ones, but am happy to give away any of the 25mm duplicates and all of the 12.7mm ones (for which I have no use). Drop me a PM if you would like any of the following for your own use. Numbers in brackets show how many are available.

 

25mm:

 

715nm Longpass Edmund Optics (1)

780FIR25 Knight Optical (8)

780BP30 Davin Catalogue (4)

 

12.5mm

 

700BP40 Coherent Photonics (3)

678BP22 Davin Catalogue (1)

Coherent 42-5587 Series (all are far red, perhaps 658nm Long-pass):

T-COS (2)

T-DAK (1)

T-DLS (5)

T-DZX (9)

T-ELS (11)

T-SAF (10)

 

Don't know what any of these Coherent acronyms mean - if anyone can decode, that would be interesting.

 

All the Coherent 42-5587 filters all look the same to the naked eye. The T-DAK engraving is not clear and could be something else (T-DZX, perhaps). There was a website where 42-5587 were being sold for $34, so they must be useful for something!