Tuesday, January 29, 2002, 7:44:22 PM, thomas wrote: tbc> Date sent: Tue, 29 Jan 2002 17:39:48 +0100 tbc> From: Frantisek Vlcek <[EMAIL PROTECTED]> >> >> 2) About the exp.time changing of dichro head - That's what's the ND >> (Neutral density) wheel for on my cheap dichro head...
tbc> How does this work? tbc> tv There is one additional wheel for setting neutral density, over a range of 2 stops, in 0-60 d steps. So I guess if your filter factor of Xc Xm Xy requires changing exposure time by Y amount to get same base exposure on the paper, you just dial the exposure difference with the ND wheel. Since I am not sure myself why the exposure should change in the first place, I (will) use it mainly for easy dodging and burning. Why does exposure supposedly change when filtering for VC papers and it doesn't change with VC head? Does it really change? Thanks Good light, Frantisek Vlcek - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
