Wait for better replies, but if I saw it I would suspect that it's a repurposed projection lens, maybe a petzval. No iris or slot for stops, the focusing wheel removed and there are signs of it...
Type: Posts; User: J. Patric Dahlen; Keyword(s):
Wait for better replies, but if I saw it I would suspect that it's a repurposed projection lens, maybe a petzval. No iris or slot for stops, the focusing wheel removed and there are signs of it...
I remember that fish. :) Good point, but not everyone has several lenses to choose from and Xenotars are expensive. The busy out-of-focus rendition is horrible for calm portraits, but great when you...
Nice. There is something 1960s-70s about the results that I can't put my finger on.
Easier to focus and compose in dim lighting, maybe? I do like shallow DOF but I'm interested in how it...
Interesting that the stopped down dual Elpro lens looks what you could expect an aplanat to perform.
It looks very usable. The sharpness is surprising, and the softening effect is a s good as it gets. And mounted in the shutter you could think that the Elpros were made to be used that way!
It's certainly worth using. Rietzschel's top of the line lens, eight element goodness.
Yes, that one. Since it's a 4,8, is it a Linear Typ A?
Very nice and practical set. Even the 270 mm when using the rear group alone looks good.
What was the Rietzschel lens you tested earlier?
This is my Rietzschel Linear 4,5/105 with balsam problems. The thread on the front can't be for the "retaining ring" since it's too short. And the lens group is crimped in place in the back. So there...
Maybe the name ring isn't meant to be unscrewed? The lens group might have been installed from the back and then crimped in place.
Arne Cröll has written about Voigtländer lenses and maybe he...
What Willy Frerk had to say about the Eikonar in 1927.
240926
This book cover shows the Eikonar design. It's similar to the Dagor, but the shapes of the elements are different....
It's too long and "D.R.P." is redundant as it stands for patent. The design was probably patented in many countries, so 'Patent' is enough.
"Hypergon Neu nach C. P. Goerz Patent" would say in...
Yes, it could be Schneider if they took over the Hypergon name as well, or maybe it's still Zeiss that owns particular name. It would be a good idea to ask their historical departments. Maybe they...
Yes, and the patent itself propably expired already in the 1930s, so anyone can copy the design. But the question is if the tradename is still owned by Zeiss or Schneider or if it has expired.
They look excellent! Just one question: Who owns the rights to the Goerz name these days?
Dagor type lenses can suffer quite a lot from coma at the largre apertures, but it's also a quality some people like. Best performance should be at f:16 - 22.
That is probably correct. The Vade Mecum says that the Tetranar is a four element Gauss type. The Hexanar would be a Dagor type, and the Octanar an "improved Dagor" with eight elements. Very nice...
Ole Tjugen hasn't been active on forums for many years now, so he might not see your question. Oscar Simon lenses are rare so I think your Hexanar deserves it's own forum thread and pictures of it. :)
The "Lens collector's vade mecum" says that, and has a drawing of a triplet type with an extra meniscus element in the front, but it doesn't look like there is room for three elements in front of the...
It's a Tessar type lens, which means that it's of similar construction as the Tessar, but might use slightly different curvatures of the lens surfaces and different glass.
Manufacturers often mentioned using double anastigmats like these plasmats, dialytes and old style double-gauss lenses for "portraits or landscapes" when using the front or back component only, and...
SGD, Frankencamera and the lens and shutter is probably a Frankencombination as well, then. If the aperture scale is correct for the Dagor or if it is for another 6,8 lens is still a mystery. But...
Yes, it could have been re-shuttered, but Goerz used capital letters back then: https://aukro.cz/goerz-berlin-dopp-anastigmat-serie-iii-dagor-1-6-8-f-120-mm-6997071158 so I wonder why the lens would...
A 120mm Goerz Berlin Serie III Dagor, serial number 233169 in rim set Compur. The font doesn't look right, and the serial number means it was made in 1913, way too early for this shutter. The camera...
The cells have individual serial numbers from the factory, and this type of lenses were sometimes sold in sets of three or more cells with a list of focal lengths for the different combinations.
A...
That is what I'm thinking as well. It doesn't look oily or anything that is migrating.
Zeiss used to make Proxar lenses as simple wide angle attachments for large format cameras. The also made negative diopter lenses called Distars to increase the focal length of the camera lens. Other...
Measure the outer diameter of the lens and buy slip-on filters in that size.
They used slip-on filters back then, and the thread is usually for the front element retaining ring and not meant for accessories. But sometimes you might be lucky and can use the thread.
Ah, yes, I forgot about the "wide open trend" with shallow depth of field and, sometimes, interesting aberrations. I'm so used to stopping down at least a little even if I want a shallow depth of...
Aren't the Xenotar and Planar for large format somewhat overrated? People think Rolleiflex and Hasselblad and hope for the performance many times doubled on large format, so these lenses sell for...
Even though the Compur shutters of this age had size numbers the retaining rings were not always of standard size. The shutters were sometimes made to fit certain lenses and cameras.
Surely...
True, nor on B.
Many of them have coated paper aperture leaves, so be careful if you try to clean the shutter.
If it says so. The smaller Compurs 1/250. They are probably a little slower than that by now, but you can still treat them as they are correct.
Yes, B = Bulb, T = Time. M = Moment. (D = Dauer,...
42mm is also a common size for slip-on filters and shades, which is good and should be easy to find. :)
What's the outer diameter of the lens in millimeter? It would be interesting to know what size slip-on filters/sun shade fits.
Congratulations! The Dogmar is a fine classic lens for black and white, just use a sun shade. I have the 135/6,3 version from 1916 and it's a gem.
Yes, there are front cell focusing Heliars. The Heliar is a modified triplet after all. You can also find it on the Voigtländer Brillant.
Cameras with front cell focusing lenses were cheaper to...
Utmärkt test! While most people would agree that the blurry corners make the single lens cells not suitable for landscape, I feel that the optical faults contribute to the image in a positive way,...
Google Rietzschel Telinear, it's a lens of the same type.