For Sale a BelOptic, 3 in 1, Laminated IRcut – Pol – ND Filter

[CarlDori]

Hello

For Sale I have a BelOptic, 3 in 1, Laminated IRcut – Pol – ND Filter 1.25inch ( 31mm ) 

This filter has a single use only, it is intended to be used on an eyepiece that's inserted into a  Herschel Prism for safe solar viewing. The purpose is to combine in a single filter assembly what solar photosphere visual observers would otherwise require three separate stacked filters to achieve:-  an IR Cut filter for safety plus a Polariser for brightness control plus a Neutral Density to bring the overall brightness to within comfortable levels. It was a product of Oliver Smie the optical designer and owner of BelOptic.

I checked with Oliver Smie and he advised me that it is no longer in production.

Many years ago, perhaps fifteen or so I purchased this filter and used it in my Herschel prism,  I was completely satisfied with it, and it was a far better solution than stacking an IR cut filter then a polarizing filter and a finally a Neutral Density filter. After a couple of years I discovered IDAS ND 5.2 solar filters and stopped using my Herschel Prism and the IRcut-Pol-ND filter saw no use at all.

150 Euros plus postage or inspection and collection from Vranic.

Inspection  welcome. Pickup from Vranic, 45 km from Belgrade, I can't deliver as I don't drive.

Best Regards

Carl Dori

062 172 3837

carlddori@gmail.com