Archived posting to the Leica Users Group, 2020/08/29
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Thanks, Nathan (and Don). Actually, the aperture was f/5.6, but the dark filter makes that camera think the aperture was narrower. Focusing is not difficult once you know the trick. Do a one-time test on a tripod. Set an f/2 or f/1.4 lens to f/2.8 (this minimizes any focus shift wide open). Focus on something and note the lens' distance scale. Then shoot with that point on the distance scale set to each of several depth of field marks to the right of the normal focusing arrow. Pick the DOF mark that is in best focus, and use that from them on. Interpolate if two DOF marks are equally good. My 35 Summicron IV focused IR best at the f/2 mark, so I've used that for my pictures. I later noticed that my old 50 Summitar has an IR indicator at the same f/2 mark. Yes, those Pacific Madronas are beautiful. I'd never seen anything like them until I came to this region. I've viewed your IR pictures with pleasure, too. Those scrubby plants from your arid region reflect more IR that one might think.? Here, the trick is to concentrate on deciduous trees.? Pines and firs render much darker, so they are good for showing contrast with the leafy trees.? But hillsides with only evergreen trees don't look much different than with regular B&W.? Blue skies with puffy clouds are great no matter what the vegetation. --Peter > These are both excellent, Peter. I especially like the first one. You do a > better job focusing than I (well, I see that you use f16, at least according > to the exif, which would provide lots of DOF). > > Cheers, > Nathan > > Nathan Wajsman > > > On 29 Aug 2020, at 07:05, Peter Klein <boulanger.croissant at gmail.com> > > wrote: > > > > The Madrona tree has red bark which peels away to reveal light > > green-skinned wood underneath. The green fairly glows in infrared. > > <https://www.flickr.com/photos/24844563 at > > N04/50280841297/in/dateposted-public/> > > > > A clear view south-southwest over the cliffs to Puget Sound.? Most of the > > trees are deciduous, and appear white in IR. Evergreen trees render quite > > a bit darker. > > <https://www.flickr.com/photos/24844563 at > > N04/50279995338/in/dateposted-public/> > > > > Leica M8 with 35/2 Summicron IV and R72 IR filter. Click to view bigger. > > Enjoy! > > --Peter