This is a continuation of testing of  the following macro lenses : Sony 90mm f/2.8 FE Macro Leica 100mm f/2.8 Apo Macro-Elmarit-R Zeiss 100mm f/2 Makro-Planar ZF Nikon 105mm f/2.8 Micro-Nikkor G VR Coastal Optical 60mm f/4 UV-VIS-IR Focus shift and LoCA in the Leica-R 100/2.8 Apo Macro   I figured that the best way to… [Read More]

This is a continuation of testing of  the following macro lenses : Sony 90mm f/2.8 FE Macro Leica 100mm f/2.8 Apo Macro-Elmarit-R Zeiss 100mm f/2 Makro-Planar ZF Nikon 105mm f/2.8 Micro-Nikkor G VR Coastal Optical 60mm f/4 UV-VIS-IR Focus shift and LoCA in the Leica-R 100/2.8 Apo Macro Earlier I reported on more focus shift that… [Read More]

This is a continuation in a discussion of spatial frequency response (SFR) and modulation transfer function (MTF) testing reproduciblity. The series starts here: Towards a reproducible MTF testing protocol This post is a continuation of the last one in this series: Off-axis MTF testing The thrust of that post was that moving the target rather… [Read More]

I’ve struggled all day tring to get the code to handle the moving target SFR calculations to work, and with confusingly erratic results. So, instead of posting off-axis MTF50 results, I’ll show you a few images that I made last week with a Nikon 400/2.8 in front of my IR-modded a7RII.