Your resulting exposure levels are not the same which is why you have a difference in color. If you put them side by side in lightroom and evened them out they should be identical. Interesting. I had no idea the k-5 was also iso invariant.
On Fri, Jan 27, 2017 at 5:54 PM, Gonz <rgonzoma...@gmail.com> 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. > > 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? > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
