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200mm 2.8 Sigma under Prakticar Electric name?
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PostPosted: Tue Nov 20, 2018 6:10 pm    Post subject: 200mm 2.8 Sigma under Prakticar Electric name? Reply with quote
Yesterday I looked to Ebay - looked for a 200/3.0 Vivitar for Pentax or some similar - and seen something strange: Click here to see on Ebay



B-mount Prakticar 200/2.8 is some more rare, than three-colored tomcat. M42 Prakticar is totally unknown.
Construction of this two lenses looks different. B-mount Prakticar there http://a4.pbase.com/g2/62/611962/2/125324842.3aLTYJI8.jpg:

And M42 Prakticar carries a Japanese quality control sticker.

Collaboration of DDR manufacturers with Sigma is well-known. Sigma made 24/2.8 Prakticar and some zoom lenses with this name are has a reputation from "not high" to "really poor". Praktica "electric M42" mount was introduced in early 70-th. So, limitation of period and known collaboration wiht Sigma gives to us a candidate. Sigma 200 2.8, part of XQ series. Problem is, that candidate is other nearly unknown lens xD.

One of them is traded on Ebay. Click here to see on Ebay






Looking close... Very similar dimensions, very similar screw heads. Sigma have additional helicoid for macro focusing (for a most XQ lenses it ruins image quality when used). Prakticar, fortunately, has no Smile

I don't know, for what a reason DDR manufacturers don`t used their famous 180mm Sonnar and used not highly regarded Sigma. Maybe, somebody is interested in these sort of rarities.


PostPosted: Thu Dec 27, 2018 12:14 am    Post subject: Reply with quote
Looks like a non-original part was added to the front...


PostPosted: Fri Dec 28, 2018 7:20 am    Post subject: Reply with quote
LittleKawaiiNeko,

At the time, CZ Scientic Instruments was the British agent for Pentacon, Sigma, and a few other brands, so they arranged Sigma to produce an additional collection of lenses branded Prakticar, some time in the 1970s. They're based on the contemporary Sigmas but the electric versions, of course, incorporated the electric indexing and simulation systems. So it's a purely British initiative that brought about these lenses.


PostPosted: Fri Dec 28, 2018 7:34 am    Post subject: Reply with quote
Seele wrote:
LittleKawaiiNeko,

At the time, CZ Scientic Instruments was the British agent for Pentacon, Sigma, and a few other brands, so they arranged Sigma to produce an additional collection of lenses branded Prakticar, some time in the 1970s. They're based on the contemporary Sigmas but the electric versions, of course, incorporated the electric indexing and simulation systems. So it's a purely British initiative that brought about these lenses.


Ahhh! OK, Thank you! for that!!


PostPosted: Fri Dec 28, 2018 9:47 am    Post subject: Reply with quote
Seele wrote:
LittleKawaiiNeko,

At the time, CZ Scientic Instruments was the British agent for Pentacon, Sigma, and a few other brands, so they arranged Sigma to produce an additional collection of lenses branded Prakticar, some time in the 1970s. They're based on the contemporary Sigmas but the electric versions, of course, incorporated the electric indexing and simulation systems. So it's a purely British initiative that brought about these lenses.

Yes, most (all?) of these "Sigma Prakticars" are actually YS lenses with a YS-LLC mount fitted. You can see the external meter coupling lever and clamping screw in the picture above. This mount can be removed and many other YS mounts fitted if you want to use these lenses on different cameras.
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