Hi Denis, excellent video. I really love the Hermagis 500mm lens. The Dallmeyer 3B I purchased from you is the most beautiful copy of the 3B I have ever seen. Thank you for the video.
Many years ago I was lucky enough to purchase a Voightlander and Son, Vienna Portrait Petzval with a focal length of 254mm manufactured in 1863. The lenses are perfect (like new). All I have to do is make a set of Waterhouse stops and I'll have a complete unit. The image is centrally rather sharp, then is falls off rather quickly half way out (5x7). You made a rather nice video, thanks.
Fantastic! I wish I had found this video back when you published it - it would have made my own process of disassembling and cleaning a Voigtlander Petzval much easier and possibly more thorough.
Really helpful, thanks! And beautifully presented. It would be very interesting to see a similar introduction to the Cone Centralisateur family of lenses one day!
What decides the image circle size in a Petzval lens? From your video looks like the lens element diameter decides the image circle and the distance between 2 elements decides the focal length?
Hi Denis, excellent video. I really love the Hermagis 500mm lens. The Dallmeyer 3B I purchased from you is the most beautiful copy of the 3B I have ever seen. Thank you for the video.
glad that you like the 3B :). and thank you for your positive feedback.
btw. the Hermagis is still available ;)
Thanks for this! I love seeing the insides of these beautiful lenses!!
Many years ago I was lucky enough to purchase a Voightlander and Son, Vienna Portrait Petzval with a focal length of 254mm manufactured in 1863. The lenses are perfect (like new). All I have to do is make a set of Waterhouse stops and I'll have a complete unit. The image is centrally rather sharp, then is falls off rather quickly half way out (5x7). You made a rather nice video, thanks.
Fantastic! I wish I had found this video back when you published it - it would have made my own process of disassembling and cleaning a Voigtlander Petzval much easier and possibly more thorough.
Really helpful, thanks! And beautifully presented. It would be very interesting to see a similar introduction to the Cone Centralisateur family of lenses one day!
Source for the invention of the watherhous stop slot in 1858?
What decides the image circle size in a Petzval lens? From your video looks like the lens element diameter decides the image circle and the distance between 2 elements decides the focal length?
And then al nagler came around and perfected the design for wonderful apochromatic flat field telescopes
Very interesting!
The sound level is awful !!!