Contax g 28mm F2.8 Distagon or Biogon

Started Mar 27, 2013 | Discussions
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Astrophotographer 10 Senior Member • Posts: 6,880
Contax g 28mm F2.8 Distagon or Biogon

I read a post here recently that said the distagon was sharper than the Biogon version.

I checked on ebay and 2 come up as Contax g 28mm  distagon F2.8. They are selling for a bit more than the Biogon.

But the photos show Biogon clearly on the front of the lens and it looks identical to the Biogon versions.

Is there in fact a separate Distagon model and if so does it have any identifying marks so you can tell?

Greg.

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couchpotato Regular Member • Posts: 129
Re: Contax g 28mm F2.8 Distagon or Biogon
1

Contax G 28mm is a Biogon. Contax C/Y mount 28mm SLR lens is a Distagon. These are two different animals.

Astrophotographer 10 OP Senior Member • Posts: 6,880
Re: Contax g 28mm F2.8 Distagon or Biogon

Thanks for that. Would a cy lens fit into a Contax g adapter do you think?

Greg.

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Lightshow
Lightshow Veteran Member • Posts: 4,636
Re: Contax g 28mm F2.8 Distagon or Biogon

Biogon is a rangefinder design where the rear element is close to the image plane(sensor), the Distagon is an SLR design where the rear element has more "distance" from the imaging plane.

So, no, the C/Y Distagon will not mount to a Contax G mount directly, you may be able to kludge it if you can find an adapter to Contax G, but I doubt it, but why would you when there are easier ways to mount C/Y to NEX.

We're the references you talking about the Contax G or ZM Biogon?

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uhligfd Senior Member • Posts: 2,002
Re: Contax g 28mm F2.8 Distagon or Biogon

How about asking the seller what lens he really has?

All the Contax G 28 mm are Biogon and will give the Nex 7 sensor magenta corners that can be removed via Adobe DNG FlatField plug-in. For the Contax Distagon 28mm (for SLRs) that is not a problem.

Astrophotographer 10 OP Senior Member • Posts: 6,880
Re: Contax g 28mm F2.8 Distagon or Biogon

Thanks for the replies. As far as Contax g or ZM biogon I believe the it was Contax g.

Greg.

 Astrophotographer 10's gear list:Astrophotographer 10's gear list
Sony Alpha 7R II Sony FE 55mm F1.8 Zeiss Batis 25mm F2 Zeiss Batis 85mm F1.8 Zeiss Loxia 21mm F2.8 +4 more
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