Please, before you shoot, note the use of the word unscientific in the title
I had a spare ten minutes. I banged the Sigma 35mm F1.4 ART lens (my fourth and best copy, known by me to be talented by difficult) on a D800E. I packed the RX-1, and I used an M240 with 35 Lux FLE which lens then got put onto an A7R with a Novoflex adaptor.
I set each camera to ISO 200 (the lowest common denominator) and, having shot a couple of tests, settled on Manual mode with 1/800th (1/750th for the M240, which doesn't have a 1/800th setting) and aperture at F5.6
I then imported each RAW file into LR RC5.3 and set WB to Daylight, profile to Adobe Standard and sharpening to 60/0.7/70/20. I then exported each file to Zenfolio at 92% quality 100% size JPEG.
The results raise more questions than any answers provided but are at least of cursory interest. Please excuse the dark patch bottom right of the A7R file: I think the strap might have blown over it and it is too late to re-shoot.
I have my own thoughts. What do others think, if interested?
BTW please note that the files look differently bright, due to some differences in T stop versus F stop, degree of vignetting, actual versus nominal ISO and accuracy of shutter speeds but none has any blown areas.
Tim Ashley Photography | A7R M240 D800 RX1 | _DSC2694