Want to Buy Hoya 72mm ND10 Filter

WTB - Hoya 72mm ND10 filter. UK buyer. Immediate Paypal payment awaits (if seller prefers). Thank you.
Richard

I can't find this listed, How mant stops is it?..Evan Clarke

Evan,

As I understand it, 10 stops - similar to these, but a whole lot less expensive (hopefully...):

http://www.speedgraphic.co.uk/round_glass_filters/bw_nd30_10_stops_110/16388_p.html

I think Hoya labels their ND by the actual filter factor, in which case that would be only 3.25 stops. I could be wrong, but you should check.

I have the B+W 1000x which was shown in your link. I had to muy it directly from Schneider USA ans they only had one on hand at the time I bought it, not one US dealer had it in stock..Evan

Depends on the filter from Hoya. Some are designated NDx2, NDx4, NDx8 and those indicate exposure factors. Others are designated ND03, ND13, ND25, ND40, ND50, ND70, and those indicate percent transmittance, as in 3%, 13%, 25%, 40%, 50%, and 70%, but I think those are mostly marketed to the scientific community. I haven't seen Hoya filters primarily designated in stops or with 0.3 units/stop numbers.

BHphotovideo shows a Hoya NDx400 (2.7 density units, or 9 stops) in 72mm for US$125.00. Denser ND filters are usually rather expensive because it's difficult to make a filter that dense with uniform transmittance across the photographic spectrum.

B+W used to make 13 stop and 20 stop ND filters, but I think those are out of production.