</span><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (Ed Sukach @ May 8 2003, 08:54 PM)</td></tr><tr><td id='QUOTE'>Any idea of the amount of attenuation at 390nm?</td></tr></table><span class='postcolor'>
Ed,
I cannot provide absolute values, but this lens was more than 2 f-stops faster on OWRO FB (a discontinued classic silver-rich emulsion FB) at 390nm than a normal 6-element Rodagon. The light source was a “normal” 300W el-bulb. I have no information on the spectral sensitivity of ORWO FB.