Archived posting to the Leica Users Group, 2007/04/22
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]IR sensitivity in unmodified digital cameras is actually quite common, as photographers who want to digital infrared photography have discovered. See http://www.jr-worldwi.de/photo/index.html?intro.html for a large but incomplete list. See http://www.naturfotograf.com/D70_rev05IR.html for a discussion of IR sensitivity in the Nikon D70, and http://www.naturfotograf.com/index2.html for a general discussion of digital infrared photography with Nikons. I have measured significant IR sensitivity on a Nikon D2h, and an Epson R-D1, but the M8 has the highest IR sensitivity of any camera I own. Mark Davison >From: Jerry Lehrer <glehrer@san.rr.com> >Reply-To: Leica Users Group <lug@leica-users.org> >To: Leica Users Group <lug@leica-users.org> >Subject: Re: [Leica] IR Cut filters Comparo and Question >Date: Sun, 22 Apr 2007 12:13:19 -0700 > >Howard, > >Along these topics, I notice that B&H is advertising Tiffen "Hot Mirror >for Digital Cameras"in lots of NON-M Leica lens >size. (Like the popular Nikon F size; 52mm) > >I thought that the M8 was the only digital camera that had the IR >super-sensitivity problem. (Yes I know that I can adapt >Nikon F lenses to M Leicas, but it is only practical for wide angle lenses) > >What other cameras have that problem? > >Jerry > > > > >Howard Cummer wrote: >>Hi Luggers, >> >>I now have two types of IR cut filters - heliopan and leica UV/IR cut >>filters. On the Leica forum there is a lot of discussion about the >>strength of different brands of filters, B&W being the strongest, Leica >>the weakest and Heliopan in between. >> >>By the light reflected it does seem that the heliopan reflects more IR >>than the Leica filter and is therefore slightly stronger. Please see: >> >> >>http://gallery.leica-users.org/v/Howard+Cummer/UV+IR+Code+Pix/IR-Cut-FiltersW.jpg.html >> >> >>http://tinyurl.com/2je3u8 >> >>Whether this makes any difference in real world pictures is a matter of >>debate but the consensus is forming on the forum that for focal lengths >>21mm and wider Leica filters are more compatible with the adjustments >>provided by the 1.012 firmware update when using coded lenses and for >>narrower view lenses it doesn't matter so much which IR cut filter is >>used. >> >>Just my 2 cents additional for today. >> >>Cheers >>Howard (in Hong Kong and now going out to take pictures.) >> >> > > >_______________________________________________ >Leica Users Group. >See http://leica-users.org/mailman/listinfo/lug for more information