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 [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.
