visualopsins
Joined: 05 Mar 2009
Posts: 11054
Location: California
Expire: 2025-04-11
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 Posted: Sun May 23, 2021 9:49 pm Post subject: |
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visualopsins wrote:
| stevemark wrote: |
| visualopsins wrote: |
What about reflections behind aperture -- just asking I don't know if that makes a difference... |
Eight reflexes in front of the aperture means either [4/4] lenses or [5/3] in front of the aperture.
The first possibility [4/4] is incompatible with the proposed (hypothetical) [6/4] construction of the "Singapur Planar 1.8/50mm". The second possibility [5/3] would mean that we have only one single lens behind the aperture - which highly unlikely for a 1.8/50mm lens. Therefore I didn't bother to look at the rear side reflexes ...
S
PS I just checked now: Both the "Carl Zeiss Planar 1.8/50mm" (made in Germany) as well as the "Singapur Planar 1.8/50mm" have five reflexes behind the aperture, and these reflexes have the same shape. Eight reflexes infront of the aperture and five behind the aperture is exactly what we would expect from the [7/6] construction.
| tb_a wrote: |
There are obviously some myths around about the Planar 50/1.8 for Rollei/Voigtländer.
I can confirm that according to the Rollei Report from Claus Prochnov ... ALL of them share exactly the same lens construction 7/6 and ALL are HFT coated as from 1974 (when production shifted to Singapore) until end of production apprx. 1980; i.e. from 1970 to 1974 HFT and MC versions have been produced in Germany.
Everything else is a fairy tale. |
Thanks a lot for this clarification which confirms my observation.
S |
 stevemark!
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Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX-A ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (151B), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
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