Hi all, "IR Tulips" is a project I've been working on for a while. I've have scanned few results and I'd appreciate any comments you may have.
http://www.photo.net/photodb/folder?folder_id=192841 On the way I've learnt a few lessons that may be of interest: 1.- With my EOS cameras, there is some compensation required for the filters used. The TTL metering is fooled with filters leaning to the red side of the spectrum. - for the Yellow#12 a -1/3 exposure compensation is required. - for the Red#25 a -1.5 EC is required. and for the SFX filter (89b ??) - 7 stops compensation are needed to produce a correct exposure with the value read through the filter. ( Departing from a base ISO of 250 for EIR, with the Yellow#12 I set the ISO to 320, for the SFX filter, I needed to set ISO6400 and -2 EC and have some luck ;-) 2.- The metering of my EOS cameras (EOS50E and 30) behave the same with filters. 3.- An extra conclusion from (1) is that the meter can "see" near-IR through the filter (with the respective compensation). 4.- Don't use the mid-roll feature of your EOS camera with EIR. When you load the film a second time, the fogging of the sprocket holes is further spread into the frame area. Not big deal, since it didn't extend beyond the limit of the slide frame but I didn't do it again. EIR film started is EIR film ended. 5.- The IR sensor of the EOS30 is stronger that the one of the EOS50E. It leaves a little peak where the film 'sits' to wait for an exposure whereas the fogging of the EOS50E is linear. Regards, Gerard. -- ==================================================================== V Gerard MAAS Senior Research Engineer +---------------+ Alcatel Bell NV [EMAIL PROTECTED] | A L C A T E L | F. Wellesplein 1 Voice: +32-3-240.7805 +---------------+ B-2018 Antwerpen, BELGIUM Fax: +32-3-240.9932 Myriad Innovative Venture ==================================================================== * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
