the last word

In yesterday’s post, there were some indications of hotspotting with the Zeiss ZF.2 35mm lens. I did a test for that today. In visible light, when I look for non-uniformity in field illumination, I use an Expodisc. I was worried that that technique might induce some artifact that I don’t understand. The sky was overcast… [Read More]

There aren’t a lot of people doing infrared photography, probably because, to do it right, you have to have a camera modified, and that’s a big step if you just want to get your feet wet. For that reason, this post won’t be useful to many people. However, because there aren’t a lot of people… [Read More]

This is a continuation of the real-world test of four 35mm lenses on the Sony alpha 7 Mark II: Sony/Zeiss (Zony) 35mm f/2.8 Zeiss 35mm f/2 Biogon M-mount Zeiss 35mm f/2 DIstagon F-mount Nikon 35mm f/2 Nikkor-D This post will look at the upper right at f/8. f/2 is here f/2.8 is here. f/4 is here…. [Read More]

This is a continuation of the real-world test of four 35mm lenses on the Sony alpha 7 Mark II: Sony/Zeiss (Zony) 35mm f/2.8 Zeiss 35mm f/2 Biogon M-mount Zeiss 35mm f/2 DIstagon F-mount Nikon 35mm f/2 Nikkor-D This post will look at the center and upper right at f/5.6 The center, at 2:1: Virtually the same…. [Read More]

This is a continuation of the real-world test of four 35mm lenses on the Sony alpha 7 Mark II: Sony/Zeiss (Zony) 35mm f/2.8 Zeiss 35mm f/2 Biogon M-mount Zeiss 35mm f/2 DIstagon F-mount Nikon 35mm f/2 Nikkor-D This post will look at the center and upper right at f/4 The center, at 2:1: Pretty similar. The… [Read More]