Posted 26 September 2009 - 10:54 PM
Posted 01 October 2009 - 01:00 PM
Does anybody know what a CTO2B-ND.09 filter does? At least that's what the small letters written on the filter itself say. I know, it's part neutral density but I don't know what the other part could be, (the filter itself looks like an ND filter, very dark).
It´s an 85 combined with ND 0.9.
I´m not absolutely sure about the density of the 85 (CTO), but I know that Agfa Gevaert used to produce color conversion filters with the scale CTO1B, CTO2B etc.
Posted 01 October 2009 - 04:21 PM
Posted 01 October 2009 - 06:08 PM
My understanding is that a CTO2B is nearer to a Wratten 81B
I would allow for the 0.9 ND and test