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02-23-2021, 01:01 AM   #1
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Porst tele 135mm f2.8 no ones review?

Dear alls, I am Hung new comer from Vietnam. I would like some one review quality of Porst lenses. I just order old one Porst lens tele 135mm f2.8 lens Made in Japan. I would there are hear some ones review this lens. Thank you very much.

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02-23-2021, 01:53 AM   #2
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Porst were (maybe still are) a German retailer who branded OEM equipment with their own name. As such, a Porst 135mm lens may have been produced by any of a number of Japanese manufacturers and simply had a Porst "beauty ring" fitted for resale. You would need to compare your lens with others of the same age and try to find one that looked identical, then use that as your reference.
02-23-2021, 04:36 AM   #3
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It is probably made by Sun Optics. Here is a review on Youtube
02-23-2021, 07:50 AM   #4
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Looking at it I wonder if it's similar to the Tamron Twin Tele 135? There are reviews for that, including my own humble views.

02-23-2021, 11:18 AM - 2 Likes   #5
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Welcome to the Pentax Forums!

In regards to Porst...
Porst - Camera-wiki.org - The free camera encyclopedia
In regards to your lens...It may have been made by any number of Japanese lens makers that provided product to be rebranded. While I have no experience with your lens, I do know that some Porst-branded lenses are quite good. Since there is no review here, you might have the opportunity to provide your impressions as a first review here once you get used to how the forum software works.


Steve
02-23-2021, 06:53 PM   #6
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QuoteOriginally posted by D1N0 Quote
It is probably made by Sun Optics. Here is a review on Youtube https://www.youtube.com/watch?v=5fSJqEuaRMM
Thank you for your references
02-23-2021, 10:26 PM   #7
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There are many different manufacturers for that lens:
The Porst Tele 135mm f/2.8 Lens. Specs. MTF Charts. User Reviews.

The quantity of rows for the rubber for focusing is one difference.
Yours show 9 rows, the one on YouTube 10, the one I owned had 8.
I have seen some with 12 rows, a silver version with 20 rows

and have heard about one with 30 rows.

It is long time ago but it was a good M42 lens.


The MC coating is not bad but SMC is better

135mm-lenses are the ones most easy to design, so there is hardly any bad 135mm lens.

I have kept my K135/2,5 but must admit, I hardly use it.
02-24-2021, 02:40 PM   #8
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QuoteOriginally posted by photogem Quote
There are many different manufacturers for that lens:
The Porst Tele 135mm f/2.8 Lens. Specs. MTF Charts. User Reviews.
Not the same lens, though as you note similarly branded 135/2.8 products were likely sourced from multiple makers over the years.

Pity about your K 135/2.5, it is supposed to be an impressive lens.


Steve

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