[rollei_list] Re: 2.8F opton?
- From: "Eric Goldstein" <egoldste@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Mon, 7 Jul 2008 09:37:07 -0400
Yes. We probably all know the modern 45 mm Tessar available for the
Contax SLR. And a Tessar 80 mm (f/2.8!) was available for the
Praktica...
Eric Goldstein
--
On 7/7/08, Richard Knoppow <dickburk@xxxxxxxxxxxxx> wrote: (snipped)
> A lens of about "normal" focal length may not need to be of the
> retro-focus type to have a long back focus. There are design considerations
> in many lenses which will allow some increase in this distance without the
> special design. An elementary example is an ordinary single meniscus lens
> which has its principle planes displaced in the direction of the curvature.
> When mounted with the concave side facing the subject the lens is slightly
> retro-focus and is slightly telephoto when mounted the other way.
---
Rollei List
- Post to rollei_list@xxxxxxxxxxxxx
- Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe'
in the subject field OR by logging into www.freelists.org
- Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with
'unsubscribe' in the subject field OR by logging into www.freelists.org
- Online, searchable archives are available at
//www.freelists.org/archives/rollei_list
Other related posts:
