Archived posting to the Leica Users Group, 2015/11/15
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I use various filters from 690 to 900. All work, but the exposures through the (cheap) 900 are too long and don't offer anything pictorially that the 760's don't, as far as I'm concerned. I have 55mm for my Tri-Elmar and the 21/2.8 and a couple of 39mm filters for the 90 macro and others. One is the Leica IR, which is about 690 cutoff and results in pinkish monochromatic images which I then massage. The darker ones result in nearly B&W images. Different lenses need different offsets for focussing IR. The 75 AA needs closer to f/2.8 while other lenses need closer to 4-5,6 and even a couple behave best with f/8, but the latter are generally rather soft with IR. Experimentation is necessary, but this is a lot cheaper and easier than it used to be with Kodak HIE. Henning Wulff hjwulff at gmail.com On 2015-11-12, at 4:15 AM, Frank Verizon <red735i at verizon.net> wrote: > I used cheap 720nm filters from China with good results. EBay is the way > to find sources. > Set camera to ISO640, let the built in meter do the work of metering. You > will be able to hand hold your camera. > Remember that there is a focus shift. If I remember correctly, it is about > f5.6 on your lens that you use for the focus... > Focus normally. Take camera from eye, note focus setting distance. Reset > the focus to the near focus set point of your f5.6 DOF setting of your > lens. Push shutter button. > > This setup worked well for me. > > I think for the purposes of experimentation, more expensive filters are > not indicated. If you like the results, and wish to try a $150 filter, > your experiment only cost you $10. > > Btw, 39mm filters are nit (were not??) available. Leica made one, but they > are hard to find > > Frank Filippone > Red735i at verizon.net > > On Nov 12, 2015, at 12:15 AM, Howard Ritter <hlritter at bex.net> wrote: > > I?ve seen numerous images recently on the forum done with the M8 and an IR > filter, but the search function in the archives is down at the moment, so > I?d like to ask two things: > > 1. What filter is recommended? The B+W 093 appears to result in good > images from what I?ve seen online, but its specifications seem to indicate > that it admits only wavelengths longer than where the M8?s filter starts > to be really effective. OTOH, the 092 filter appears to pass a good deal > of visible red, not what I?m after. > > 2. My Elmarit-M 24/2.8 takes E55 filters. B&H lists nothing in E55 except > a few Leica UVA/IR blocking filters, obviously the opposite of what I?m > after. Will this lens take standard 55mm filters? For some reason, the > answer to this seemingly simple question has been astoundingly difficult > to find by googling. > > Thanks for any advice, > ?howard > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information