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Petri 50/2.8 M42 lens
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PostPosted: Tue Apr 24, 2012 1:54 pm    Post subject: Petri 50/2.8 M42 lens Reply with quote
I haven't been able to find any information about the Petri 50mm f2.8 M42 lens. The lens is for sale at a flea market attached to a Petri TTL camera. The lens itself looks brand new but the camera is not in great shape. The lens reminds me of an old takumar lens (fluted focus ring). It's all black.

Could this be a macro lens since it is so slow?

The price is 45 euro for the camera and the lens which sound expensive, what do you think the lens is worth?


PostPosted: Tue Apr 24, 2012 2:25 pm    Post subject: Reply with quote
No, not a macro lens, 2.8 lenses were common. it will be a 4 element type, either a Tessar or Unar design.

This was the cheaper Petri normal lens, the 1.8/55 is much more common.

45 euros is about 35 euros too much.


PostPosted: Tue Apr 24, 2012 2:30 pm    Post subject: Reply with quote
iangreenhalgh1 wrote:
45 euros is about 35 euros too much.
Laughing Laughing Laughing

But I have to say that it seems rather rare as I could not find a single picture of it anywhere.


PostPosted: Tue Apr 24, 2012 4:29 pm    Post subject: Reply with quote
It may be common under other brands, later Petris were made by Cosina, although not sure if this one is late enough to be a Cosina.


PostPosted: Tue Apr 24, 2012 4:43 pm    Post subject: Reply with quote
Well if the Petri is a MF-1 it has a lovely bright viewfinder, I liked mine as it was very small but couldn't solve a light leak so broke it up for screws....btw the Petri 45mm f2.8 CC auto that came with it was one of the crappiest lens I have ever used.


PostPosted: Tue Apr 24, 2012 4:48 pm    Post subject: Reply with quote
funny there seems to be alot of talk about Petri as I also was thinking of buying a petri 35mm f2.8 lens mint in its case, that has been lying in our flea market for a few months now... i wonder if thats worth the buy....?


PostPosted: Tue Apr 24, 2012 4:56 pm    Post subject: Reply with quote
Smoli4 wrote:
funny there seems to be alot of talk about Petri as I also was thinking of buying a petri 35mm f2.8 lens mint in its case, that has been lying in our flea market for a few months now... i wonder if thats worth the buy....?


Depends, if it's an earlier 1960s all metal one, take it, it will be a good lens, I have the 1.8/55 and 2.8/35 and they are both really sharp with very nice bokeh, I love them. If it's a plastic one from the late 70s/early 80s it will be a Cosina and pretty average.

The way to tell is by the mount, the earlier ones have a crude bayonet like this:



PostPosted: Tue Apr 24, 2012 4:57 pm    Post subject: Reply with quote
Excalibur wrote:
Well if the Petri is a MF-1 it has a lovely bright viewfinder, I liked mine as it was very small but couldn't solve a light leak so broke it up for screws....btw the Petri 45mm f2.8 CC auto that came with it was one of the crappiest lens I have ever used.


Not a proper Petri, a rebadged something else, probably Cosina, was it low in contrast with muted colours? Cosina lenses usually are crappy in contrast and colours.


PostPosted: Tue Apr 24, 2012 5:14 pm    Post subject: Reply with quote
yes her mount looks like this.
and orange figures on the distance scale.
do you know if it can be adapted for canon?


PostPosted: Tue Apr 24, 2012 6:24 pm    Post subject: Reply with quote
Yes, it can be adapted, if you take an M42-Canon adapter and grind out the middle a bit it will fit over the lens tube at the back of the Petri, to get infinity you have to remove the Petri ring, but this is easy to do. I did this conversion with one of my 1.8/55 Petris (I have five copies!)

Actually, my Petri 2.8/35 is already converted to Canon, if you buy the one on your flea market, we could do a swap, I will take some pics of mine, I'd prefer one that is in the original bayonet so I can use it with my Petri SLRs (wish I'd never converted mine!).


PostPosted: Tue Apr 24, 2012 6:53 pm    Post subject: Reply with quote
iangreenhalgh1 wrote:
Excalibur wrote:
Well if the Petri is a MF-1 it has a lovely bright viewfinder, I liked mine as it was very small but couldn't solve a light leak so broke it up for screws....btw the Petri 45mm f2.8 CC auto that came with it was one of the crappiest lens I have ever used.


Not a proper Petri, a rebadged something else, probably Cosina, was it low in contrast with muted colours? Cosina lenses usually are crappy in contrast and colours.


The distance from the front lens (deeply recessed) to the back lens is about 3/4 inch yet it supposed to be 4 elements in 3 groups maybe something is missing...anyway took a few test shots on different rolls of film and the results were not sharp.


PostPosted: Tue Apr 24, 2012 7:07 pm    Post subject: Reply with quote
That sounds normal, think of the Tessar, it is 4 elements and deeply recessed.

Tessar is razor sharp, as are the other 4 element lenses of similar design - Xenar, Skopar, Xpres etc.

Either you have a badly made lens or a faulty one or it was just cheap and crappy, certainly there were some crappy 2.8/45 lenses put on some cheap japanese compacts in the past.
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