I still like the better exposed image though, the color rendition is more natural to my eye.
On Fri, Jan 27, 2017 at 6:12 PM, Gonz <[email protected]> wrote: > 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 -- -- 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.
