[rollei_list] Re: Whiteface T with Xenar question
- From: Eric Goldstein <egoldste@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Sat, 21 Mar 2009 21:01:42 -0400
Peter -
My recollection is that, like you say, the higher index glass reduced chromatic.
Tessars were good lenses from the get-go, but they have certainly been
improved over the years. The last 45 mm/2.8 Zeiss Tessars for the
Contax were amazing lenses...
Eric Goldstein
--
On Sat, Mar 21, 2009 at 7:59 PM, Peter K. <peterk727@xxxxxxxxx> wrote:
> Sanders,
>
> I would say #2. I do not think the high index crown lanthanum glass improved
> the Tessar in terms of resolution. Now I am sure people will argue, but
> perhaps it improved flare, reduced chromatic aberations, etc. But older
> non-coated Tessars were often superb in terms of resolution.
> Interesting article here that discusses this in detail.
>
> http://www.willbell.com/TM/ChapterB.3.pdf
>
> The quality of the Xenar v. Tessar is not something you'd be able to tell
> apart in print or transparencies IMO. Enjoy the camera.
>
> When is your son due?
>
> Peter K
---
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