I’ve had a request for an additional function on this blog: the ability to be notified via email when someone replies to your comment. I think I’ve added that function. When you comment now, you should see something like this at the bottom of the commenting page: You’ll have several choices from the drop down… [Read More]
Archives for 2016
Will lens aberrations eliminate aliasing?
Posted on DPR recently was an interesting question: Is an AA filter necessary for wide aperture and deep DOF photography? That is, will lens aberrations for wide open photography and diffraction for deep DOF photography do the job of the AA filter? I’ve beat the diffraction issue to death in the past, but I hadn’t… [Read More]
A seven-shot focus shift test
Previously, I posted a test protocol aimed at discerning focus shift and longitudinal chromatic aberration (LoCA) in camera/lens systems: Towards a macro MTF test protocol This test is accurate, repeatable, and can provide the basis for quantitative comparisons between lenses. That’s the good news. The bad news is that the test protocol as it has… [Read More]
A book report — hard proofing
This is part of a series about my experiences in publishing a book. The series starts here. I previously reported on gang hard proofing. Yesterday, Jerry asked me for the final copies of each of the images for the book. I had previously identified seven images for which the standard Adobe gamut mapping with relative… [Read More]
E-mount lens longevity
When I was working with film and view cameras, I ran into many who loved to use old lenses — in some cases, 19th century lenses with no shutter mechanisms at all. While not good performers by the standards of the day, these uncoated, museum-worthy relics had what I now call “endearing flaws”, and their… [Read More]
- « Previous Page
- 1
- …
- 25
- 26
- 27
- 28
- 29
- …
- 61
- Next Page »