David; If you hold the lens up to the light and view it through the rear
element and if you see aloc acoc on the front element with the c letters facing
in the opposite direction,then I would say you have a bow-wow lens :-).
Seriously, I went on the net and found a site where some fellow had a short
focal length zoom with the Rexatar name. The response to him was rather
speculative. One respondent said maybe Cimko made it. The other respondent said
Cimo. I also found that lens on a 2010 post of The Pentax Forum one member was
given the lens that you are talking about he took it apart and cleaned it, He
said the blades were a bit loose. Anyway, neither site that I found could
positively name the manufacturer. I would say since it was given to you, you
are still ahead of the game.
Rich Palmer
On Wednesday, April 26, 2017 10:48 AM, David Young <dsy@xxxxxxxxxxxxx>
wrote:
Recently, I was given a Rexatar (actually made by ???) 200mm/f3.3 tele lens in
42mm (Pentax/Paraktica/Contax) thread mount.
And as most of you know, I teach photography.... in fact I start my (somewhat)
advanced class, tonight. (It's a small town - 5 students!)
I was testing the Rexanar, yesterday, in the hopes that it might show some
chromatic aberration, so that I could quit using a shot I borrowed from the
Wikipedia.
What I found was probably the worst lens I've ever owned/used!
For comparisons, the top shot is a similar one of the brand-name on my BBQ made
with my 12~40/2.8 Oly PRO series zoom. The lower shot is almost the same shot,
made with the Rexanar.
Compare, colour, resolution (try to read the temperature gauge), check
distortion (shape of the logo & gauge) and, of course the chromatic aberration.
http://www.furnfeather.ca/look/RExatar.html
I'm thinking that this 1975 lens may qualify as one of the worst lenses ever
made. Which is a pity, as it's in mint shape, with really nice, very smooth
focusing - though the auto-diaphragm is a wee bit sluggish.
Comments? Anyone?
David.
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