Re: Hoya Filter Quality

[Clive Warren <Clive.Warren@xxxxxxxxxxxxx>]

>
>My R72 has some (this is the best I can describe) flecks on the
>surface of the filter, you can't see thru them but its obvious that
>their less black then the rest of the filter.
>
>Plus the black coating seems to fade at one end of the filter, at the
>very edge where the glass meets the filter ring.
>
>Do I have worry about either of these leaking ore IR than they
>should ?
>
>Thanks,
>ket
>
>P.S. This is my second filter, the first had a more pronounced fade
>that actually went into the area past the filter ring and into the
>glass itself. Neddless to say I banged on some tables and got it
>changed ;)


Ket,

My Hoya R72 is similar but not as bad as your own; it did not appear to
affect IR photos.  Given the price this is not really acceptable.  Quality
control seems to be marginal.

This was another driver for me to approach manufacturers directly and have
infrared filters made in bulk.  Quality is guaranteed and the filters are
made to strict Wratten specifications.  I had a bulk delivery of R72
(Wratten 89B) at the end of last week and am waiting for 87s and 87Cs.

Please visit the CoCam web site to find out more.







All the best,

             Clive   http://www.cocam.co.uk
                     Photographic Services, Filters and Equipment
                            http://clive.bel-epa.com
                            Adventures in Cyberspace - Digital Art and Photos


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