Here it is with autotoning: https://www.flickr.com/photos/66982297@N02/32179978780/in/dateposted-public/
Much better... On Fri, Jan 27, 2017 at 6:08 PM, Gonz <[email protected]> wrote: > Those are very good Larry. Much better performance with the K-1 IMO. > > > On Fri, Jan 27, 2017 at 6:00 PM, Larry Colen <[email protected]> wrote: >> I just tried a quick test with the K-1. I initially bracketed five shots, 2 >> stops per frame, Tav, set to -2 EV, which gave me -6, -4, -2, 0 and +2, >> however my lightroom will only correct up to 5 stops, so I dropped the -6 >> EV. >> >> Four presses of the shutter, two of some shelf lichen in my front yard and >> two of the river in my back yard. Only correction in lightroom is nominal >> exposure correction. >> >> On flickr: >> https://www.flickr.com/photos/ellarsee/sets/72157675962146534 >> >> On fluidr so you can see the exif next to each shot: >> http://www.fluidr.com/photos/ellarsee/sets/72157675962146534 >> >> Unfortunately that didn't give me base ISO, I may try fiddling with things >> to see if I can get another set that starts at ISO 100. >> >> >> >> >> Gonz wrote: >>> >>> I'm using the K-5, considered one of the ISO invariant cameras. Here >>> are the images: >>> >>> Properly exposed with ISO1600: >>> >>> https://www.flickr.com/photos/66982297@N02/32559204535/in/dateposted-public/ >>> >>> +4 compensation at ISO 100: >>> >>> https://www.flickr.com/photos/66982297@N02/32179978780/in/dateposted-public/ >>> >>> The colors are where the extreme differences are. The histogram >>> actually goes to the right at about the same spot. >>> >>> >>> On Fri, Jan 27, 2017 at 5:28 PM, Larry Colen<[email protected]> wrote: >>>> >>>> >>>> Gonz wrote: >>>>> >>>>> Ok. I've done some experiments to test this whole ISO invariance >>>>> subject, which some ascribe almost mythological healing powers to >>>>> underexposed images. I'll reveal one pair of experimental images >>>>> after I have my methodology down. Hence this post. The results were >>>>> so surprising, that it made me question my methodology. >>>> >>>> >>>> Which body are you using? >>>> >>>>> Here is what I did. >>>>> >>>>> 1. take an image with ISO 1600 properly exposed. Use manual and set >>>>> shutter and aperture for image result that takes up most of the >>>>> histogram (avoid blowing highlights) >>>>> 2. take a second image with same shutter and aperture but at ISO 100. >>>>> I.e. 4 stops underexposed. >>>>> 3. Import into lightroom, compensate +4 exposure on the underexposed >>>>> ISO 100 image. >>>>> >>>>> My lightroom has a limit of +4, hence the selection of 100 and 1600 >>>>> for ISO values. >>>>> >>>>> Images should look roughly the same if this methodology is right? Are >>>>> the ISO values correct? 100 * 2^4 = 1600, or is this wrong? >>>> >>>> >>>> It looks right to me. Before I had heard of ISO invariance, I sort of >>>> discovered it accidentally. When not shooting action, and when I don't >>>> want >>>> to bother chimping the histogram for every shot, or when I'm shooting >>>> wide >>>> dynamic range images I'll just bracket, generally three exposures +/- 2 >>>> or >>>> three stops. >>>> >>>> My preferred auto exposure mode is usually Tav. I noticed that when >>>> bracketing in Tav, after correcting my exposure in lightroom, I generally >>>> couldn't see much difference between the three shots. Do note that in >>>> the >>>> "over" shots I'd get a bit more clipping, and in the "under" shots, I'd >>>> sometimes get a bit more noise in the shadows. Also, there seem to be >>>> some >>>> nonlinearities in the way LR processes files, so they wouldn't always all >>>> come out exactly the same after processing, but yeah, modulo some channel >>>> clipping, they'd look pretty close. >>>> >>>> -- >>>> Larry Colen [email protected] (postbox on min4est) http://red4est.com/lrc >>>> >>>> >>>> -- >>>> PDML Pentax-Discuss Mail List >>>> [email protected] >>>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >>>> follow the directions. >>> >>> >>> >>> >> >> -- >> Larry Colen [email protected] (postbox on min4est) http://red4est.com/lrc >> >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > > > -- > -- Reduce your Government Footprint -- -- Reduce your Government Footprint -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
