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11-13-2021, 08:16 AM - 5 Likes   #1
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Some vintage camera close-up p0rn

Details from a KW (Kamera-Werkstätten Dresden) Patent-Etui 6.5x9 with a dial-set Vario shutter and a Meyer-Görlitz Anastigmat Trioplan 1:6.3 F=10.5cm lens from ca. 1931*. All detail photos taken with K-1 and the VS Technology VS-L12056-05/V 120mm F5.6 0.5x lens I’m using for medium format dslr scans.

* Dated via the lens serial number using the S/N search tool here:
https://knippsen.blogspot.com/2019/07/dating-your-camera-altersbestimmung.html

KW logo:




Alfred Gauthier logo on Vario shutter:




KW name plate:




I posted the camera portrait before in the Gear Porn thread (taken with K-5 II and Tokina AT-X Macro 90mm1:2.5, focus-stacked)




11-13-2021, 11:37 AM - 1 Like   #2
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Very nice! That is a pretty sophisticated lens you took it with. Do you work with machine vision?


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11-13-2021, 02:15 PM - 1 Like   #3
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Beautiful shots of a beautiful camera! Thanks for sharing
11-13-2021, 02:27 PM - 1 Like   #4
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QuoteOriginally posted by BigMackCam Quote
Beautiful shots of a beautiful camera! Thanks for sharing
Thanks for looking – and the kind words! There will be some more…

11-13-2021, 03:37 PM - 1 Like   #5
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QuoteOriginally posted by stevebrot Quote
Very nice! That is a pretty sophisticated lens you took it with. Do you work with machine vision?

Steve
No, I don’t. I designed a DSLR scanning setup for a digitising project at my institution (University of Vienna). After a lot of experimenting which included a Flextight X1 scanner and earlier experiences with a Nikon Coolscan LS-9000, we came to the conclusion that we got better results from the Pentax K-1 but needed the right lenses. So we ended up with a Schneider-Kreuznach Xenon-Zirconia 2.8/89-0001 lens (89mm f/2.8) for 1:1 and the VST VS-L12056-05/V (120mm f/5.6) for 1:2. Both can do only one thing but do it impressively well. If you are interested a photo and explanation of the setup is here: 1810230004 Film copying (DSLR scanning) setup | Wolfgang Kraus | Flickr
11-13-2021, 03:42 PM - 1 Like   #6
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Beautiful! Any shots taken with it?

Thanks,
Ismael
11-13-2021, 03:49 PM - 1 Like   #7
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QuoteOriginally posted by wkraus Quote
No, I don’t. I designed a DSLR scanning setup for a digitising project at my institution (University of Vienna). After a lot of experimenting which included a Flextight X1 scanner and earlier experiences with a Nikon Coolscan LS-9000, we came to the conclusion that we got better results from the Pentax K-1 but needed the right lenses. So we ended up with a Schneider-Kreuznach Xenon-Zirconia 2.8/89-0001 lens (89mm f/2.8) for 1:1 and the VST VS-L12056-05/V (120mm f/5.6) for 1:2. Both can do only one thing but do it impressively well. If you are interested a photo and explanation of the setup is here: 1810230004 Film copying (DSLR scanning) setup | Wolfgang Kraus | Flickr
That's an awesome digitising setup! Makes my own DSLR-based setup seem rather humble by comparison

11-13-2021, 04:45 PM   #8
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QuoteOriginally posted by BigMackCam Quote
That's an awesome digitising setup! Makes my own DSLR-based setup seem rather humble by comparison
Thank you! I wouldn’t have gone that far just for my individual needs but it saves us a lot of work in the project. All in all, it is also much cheaper than the X1 was.

QuoteOriginally posted by ismaelg Quote
Beautiful! Any shots taken with it?

Thanks,
Ismael
I suppose you mean the Patent Etui? No, because I don’t have a film holder and it is a rather basic model. But I have and use a Certosport 6.5x9 with a Xenar lens and a Voigtländer Bergheil 6.5x9 with a Heliar lens. I will post some photos soon.
11-13-2021, 05:55 PM   #9
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QuoteOriginally posted by wkraus Quote
No, I don’t. I designed a DSLR scanning setup for a digitising project at my institution (University of Vienna). After a lot of experimenting which included a Flextight X1 scanner and earlier experiences with a Nikon Coolscan LS-9000, we came to the conclusion that we got better results from the Pentax K-1 but needed the right lenses. So we ended up with a Schneider-Kreuznach Xenon-Zirconia 2.8/89-0001 lens (89mm f/2.8) for 1:1 and the VST VS-L12056-05/V (120mm f/5.6) for 1:2. Both can do only one thing but do it impressively well. If you are interested a photo and explanation of the setup is here: 1810230004 Film copying (DSLR scanning) setup | Wolfgang Kraus | Flickr
QuoteOriginally posted by wkraus Quote
Thank you! I wouldn’t have gone that far just for my individual needs but it saves us a lot of work in the project. All in all, it is also much cheaper than the X1 was.
It is cool that much of the hardware was already available to you and that the K-1 brought specific strengths to the project. It had not occurred to me that pixelshift might be used to reduce or eliminate aliasing artifact that might otherwise degrade the copy.


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11-14-2021, 03:36 AM - 1 Like   #10
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QuoteOriginally posted by stevebrot Quote
It is cool that much of the hardware was already available to you and that the K-1 brought specific strengths to the project. It had not occurred to me that pixelshift might be used to reduce or eliminate aliasing artifact that might otherwise degrade the copy.

Steve
With a sensor with 205 pixels per mm, the K-1 (or K-1 II which we are also using) offers a theoretical resolution of about 100 line pairs per mm. Without Pixelshift, this is reduced by the interpolation taking place during demosaicing. With Pixelshift on comes close to the theoretical resolution. When copying 24x36 mm film, this translates to a resolution of about 5000 ppi. This is less than the 6300 ppi the X1 scanner offers, but in practical comparison the X1 files have hardly more detail if any, but have a considerable amount of noise in dark areas and other disadvantages.

The 100 line pairs per mm are unable to reproduce the finest details of high resolution film but are sufficient for most practical purposes. What is equally relevant is that apart from sheer resolution this is an frequency area where much of the signal related to film grain is located so the amount of aliasing at the resolution limit makes a lot of difference.

With 6x6 film the K-1 (about 2200 ppi) falls behind the X1 (3200 ppi) except when stitching several shots of one frame.

Let’s agree that this is not totally OT because it matters when digitising film out of our vintage cameras.
11-14-2021, 10:24 AM - 1 Like   #11
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Details from a Contessa Nettel Adoro 6.5x9 with a dial-set Compur shutter and a Carl Zeiss Jena Tessar 1:4.5 f=12cm lens from ca. 1922. Photos taken with K-1 and VS Technology VS-L12056-05/V 120mm F5.6 0.5x lens.





11-21-2021, 03:39 PM - 1 Like   #12
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Embossed Asahi Optical Co. logo on a leather lens hood case (Takumar or Auto-Takumar era, ca. 1957–60). Again taken with K-1 and VS Technology VS-L12056-05/V 120mm F5.6 0.5x lens.



11-28-2021, 09:11 AM - 1 Like   #13
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Some details from a Voigtländer Bergheil 6.5x9 with a rim-set Compur shutter and Heliar 1:4.5 f=12cm lens from ca. 1932. Photos taken with K-1 and VS Technology VS-L12056-05/V 120mm F5.6 0.5x lens.







12-02-2021, 06:47 PM   #14
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Excellent detail shots for reference and comparisons.
12-03-2021, 04:40 PM   #15
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QuoteOriginally posted by arnold Quote
Excellent detail shots for reference and comparisons.
Thanks Arnold. I do admit that for reference the photos could be more informative. (If anyone is interested I can provide all kinds of information, visual or textual.)
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