Archives for 2017

The is the fifth in a series of posts about the Voigtlander 65 mm f/2 Apo-Lanthar macro lens. The series starts here.  We proved here that the Apo-Lanthar has a flat field for distant subjects. I received a request to look at field flatness at 1:2. It’s taken me several days to develop an alignment… [Read More]

A few days ago, I made this post about the visual detectability of information with a signal to noise ratio (SNR) of less than one. If you don’t remember it you should at least go back and skim it, or this post won’t make much sense to you. It occurs to me that the normalization… [Read More]

The is the fourth in a series of posts about the Voigtlander 65 mm f/2 Apo-Lanthar macro lens. The series starts here.  I got a request to test the Apo-Lanthar against the Sony/Zeiss (Zony) 55mm f/1.8 Sonnar at macro distances, using extension tubes on the Sony/Zeiss lens. I’m still working out a good visual test… [Read More]

The is the third in a series of posts about the Voigtlander 65 mm f/2 Apo-Lanthar macro lens. The series starts here.  The Voigtlander 65 mm f/2 Apo-Lanthar performs so well at distance that it’s natural to think of using it for portraits or in other situations where the bokeh is important. There are two pieces… [Read More]

The is the second in a series of posts about the Voigtlander 65 mm f/2 Apo-Lanthar macro lens. The series starts here.  I’ve received a request to test the new Voigtlander macro against another macro lens of similar focal length. The only candidate that I have lying around is the 60 mm f/2.8 AF Micro-Nikkor,… [Read More]