Jerry, This is also classed as a 'skylight' filter which I think is a little stronger than a UV. No reason why it can't be used as a lens protector for B&W but may give a slightly warm cast to colour, especially transparency film. Negative can be corrected at printing stage, John -----Original Message----- From: rollei_list-bounce@xxxxxxxxxxxxx on behalf of Jerry Friedman Sent: Thu 22/06/2006 15:01 To: rollei_list@xxxxxxxxxxxxx Subject: [rollei_list] Re: Filter identification question Thank you John! If it is a color conversion filter, I assume it would have no affect upon black and white film. Could it be used as a UV-type filter to protect a lens? Best, Jerry __________________________________________________