9 lenses at 2.5X
I decided to run a simple comparison between these lenses at a magnification I often like to use in the field: 2.5:1.
Kiron 105mm f2.8 & Raynox +6 diopter (resulting focal length: 65mm)
Nikon Micro-nikkor 105mm f4 & Raynox +6 diopter (resulting focal length: 65mm)
Ernst Leitz Milar 65mm f4.5
Carl Zeiss Luminar 63mm f4.5
Nikon Nikkor 50mm f1.8 (used reversed)
Nikon EL-Nikkor 50mm f2.8 N (used reversed)
Wollensak Micro-Raptar 50mm f4.5
Carl Zeiss Jena Mikrotar 45mm f4.5
Ernst Leitz Milar 40mm f4.5
It's not a scientific test and I have only included one aperture setting per lens. I've tried to choose the setting so as to get the most out of every lens or lens combination. In some cases I chose it from experience (I know where many of them have their sweet spots) and in other cases I had to try a couple of different settings to decide.
The test subject is the head of a dead hover fly (I did not kill it ;-)).
Each test shot is stacked from 25 exposures in Zerene Stacker. Whitebalance was fixed at 4800K. The plastic cup diffuser I used here adds some warmth and that is why I didn't go with 5300K-5600K which is the standard flash light temperature. I have cropped the images from the sides to reduce the dead space around the subject but otherwise the images are as shot.
I know this is not an ideal subject for a standardized lens test. However, I'm not so much interested in corner performance, flatness of field etc since I mainly work in the field on living subjects.
Scroll down for some notes on the test setup!