Another interesting lens from Voigtlander. This is actually a Zeiss 25mm F2.8 Distagon rebranded for Voigtlander. It was also sold as Rollei-HFT Distagon 25mm F2.8.
It's a very well-made lens, with a pretty decent coating for the era but better to avoid strong frontal light, useful for film and works well on digital, just keep in mind that it needs to be stopped down to at least F5.6 to have decent corners. The center is sharp from 2.8 and very sharp at 5.6 and 8.0
Optical formula: 8e/7g
Weight: 310g
Angle of view: about 82 degrees
Filter size: 49mm