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Forum: Pentax SLR Lens Discussion
03-16-2023, 08:10 AM
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ps. It is a 4/4 construction similar to the ZEISS Sonnar 2.8/135 of West Germany. But the Zeiss Sonnar's of East Germany are better, Nevertheless very sharp with f 8 and short times
kind regards - joe
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Forum: Pentax SLR Lens Discussion
01-02-2023, 07:44 AM
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hi,
Beroflex is the trading name for products of GDR, i.e.former East Germany. Like Carl Zeiss Jena, Exakta and Praktica they all produced and exported high end finishing products for the western market at very low prices. Within the years 1985 and 91 (until 2 years after the fall of "Berfliner Mauer") they made joint ventures with japaneese producers, especially for zoom lenses, but also for some single lenses. May be that this BEROFLEX lens issues of Japan? :)
Kind regards - joe
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Forum: Pentax SLR Lens Discussion
11-07-2022, 05:36 AM
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hi, It has a very similar housing and 4/4 optical design as Super Albinar 2.8/135 - and this lens has ZEISS capabilities at f 8 - extremely sharp (a Sonnar copy) - kind regards - joe
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Forum: Pentax SLR Lens Discussion
11-07-2022, 05:15 AM
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hi, optical quality is good - kind regards joe
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Forum: Pentax Full Frame
09-13-2022, 12:57 PM
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hi, no adapter, the new voigtländer lenses are produced for MF Pentax mount by special order. So the lenses are really expensive by 1.000 dollars - kind regards - joe
PS For old vintage Voigtländer lenses with ICAREX mount there are no adapters available - unfortunabely .-(
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Forum: Homepage & Official Pentax News
02-13-2022, 11:59 PM
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Pentax k-70 24MP - best APS-C cam of PENTAX ever - kind regards -Joe
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Forum: Pentax SLR Lens Discussion
06-03-2020, 03:52 AM
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hello , ZEISS 3.5/135 or 4/135 - no CAs very sharp
kind regards joe
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Forum: Troubleshooting and Beginner Help
05-27-2020, 02:37 AM
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Hallo, really, there are some old PORST lenses without high value and without achromatic elements , undoubtably! (same lenses of REVUE)
*** BUT ***
I've got 3 lenses of PORST of higher quality and WITH ONE ACHROMATIC ELEMENT - in order to improve sharpness at the edges and to eleminate CA's:
PORST TELE 2.8/135 with cheap plastic housing, but 5/4 elements (some flare wide open, but from f 5.6 up to f 11 very sharp and nice bokeh) - prduced by ENNA, Munic or ISCO Göttingen.
PORST AUTO N 2.8/135 with metal housing and 5/4 elements (very rare and expensive) , too !!! - not the frequent auto D with 4/4 elements, which is worse. (similar to ZEISS Sonnar quality)
and PORST 1.8/50 with 6/5 elements (very similar to Pentax 1.8/50).
All these 3 lenses are made of high quality glass, the auto N for macro shootings with extension tubes and the 1.8/50 for use with 2 x macro converter = excellent results with all 3 lenses stopped down to f 5.6-11 !!!
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Forum: Pentax SLR Lens Discussion
01-23-2019, 04:57 AM
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The best PORST 2.8/135 is the Auto N, because of its 5/4 elements contruction. auto D has only 4/4 lenses and is not so extremely sharp as AUT N !!! Auto D is fequerntly found, Auto N is very rare !!!
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Forum: Welcomes and Introductions
11-23-2013, 07:58 AM
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Posted By
joe8 |
Replies: 8
Views: 615
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Bonjour Jean, merci pour vôtre message, c'est très agréable de discuter ici en sautant au-dessus des frontières des pays. Nous faisons des"shootings" avec l'appareil photo numérique et non avec le fusil,comme. J'aime la nature et je deseste ceux qui la détruisent. Je vais montrer un prt de mes photos en quelques semaines.Bonne soirée encore - salut :-) joe
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Forum: Welcomes and Introductions
11-23-2013, 07:47 AM
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Posted By
joe8 |
Replies: 8
Views: 615
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hi, thank you, you're surely a friend of deep sea shootings. good luck kind greetings from Germany :-)yours joe
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Forum: Welcomes and Introductions
11-23-2013, 07:41 AM
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Posted By
joe8 |
Replies: 8
Views: 615
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hallo Jean, bonjour, c'est une vraie surprise de rencontrer ici un ami Pentax de la France.merci beaucoup pour vos salutaions. Je pense qu'on va échanger quelques expériences au futur. je vous souhaite un bon week-end. Ici en Allemagne il pleut.:-)salut
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Forum: Welcomes and Introductions
11-22-2013, 11:47 AM
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Posted By
joe8 |
Replies: 8
Views: 615
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hi joel I'am from Germany, school teacher, k100, k200 and k-x. unfortunately the k100 was too near to my mobile. warning. separate always loading cables and handy far distant from your pentax:magnetism is damaging it, so that shutter time program is sometimes in trouble.I must move batteries and than I start b 1/125 sec.
Nice weekend
your truly joe
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Forum: Welcomes and Introductions
11-14-2013, 11:39 AM
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Posted By
joe8 |
Replies: 8
Views: 615
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I am a new member of pentax forums. I am using ist ds, k100, k200 k-x and sometimes k 5 of my young sons. The lenses for these DSLR are nearly all used. The manual Pentax collection is arranged in 2 rooms with a lot of Pentax AF cameras.But why for such a lot of cameras and lenses?I have been teacher for digital photography since 5 years at a private school. - My wife find it a few"terrible", because there are arranged 3 meters photo-books, additionally. I like macro photos especially insect shootings as butterflies. That's why I modify my lenses, in order to get sharper results. This seems to be unusual, so that some members have asked me very quick, why for 10 points for normal equipment?I will explain and demonstrate it later by some postings and pictures ok? - kind regards joe8:)Ps I am preparing a greek-french-german grammar book within the next weeks. So in spring will follow some samples.kind greeting to all users
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