Dennis is absolutely right.. digital sensors are far more sensitive that their analog counterparts, and detail is often seen in the control images. On Sat, Oct 19, 2013 at 4:56 PM, Dennis Thayer <dennisthayer@xxxxxxxxxxxxx>wrote: > Ryan, > > It's not unusual for digital systems to show some detail in the retina > before the dye is seen. This may be due to the different spectral response > than film has. > > Dennis Thayer > UW-FPRC > > -----Original Message----- > >From: FreeLists Mailing List Manager <ecartis@xxxxxxxxxxxxx> > >Sent: Oct 19, 2013 12:14 AM > >To: optimal digest users <ecartis@xxxxxxxxxxxxx> > >Subject: optimal Digest V4 #197 > > > >optimal Digest Fri, 18 Oct 2013 Volume: 04 Issue: 197 > > > >In This Issue: > > [optimal] FA Filters > > > >---------------------------------------------------------------------- > > > >From: "Nelson, Ryan" <RNelson@xxxxxxxxxxxxxxx> > >Subject: [optimal] FA Filters > >Date: Fri, 18 Oct 2013 19:14:19 +0000 > > > >Hello all, > >How often does everyone change out their FA filters? We seem to be > getting a small amount of pseudofluorescence when shooting control frames > at a high flash setting. We use Zeiss FF450s with OIS. Any feedback is > appreciated, thank you for your time. > > > > > >[Description: signature4] > > > > > > > > > >------------------------------ > > > >End of optimal Digest V4 #197 > >***************************** > > > > > Dennis Thayer > > --