All Forum Comments
Price reduced to £190 incl RMSD. If you want to swap (f2.8 or higher aperture) your lens PM me.
Comment by Jal87 posted on FS: Porst 55mm f1.2 at 24/02/2013 - 18:33
Swap possible for an auto focus f1.4 or macro f2.8.
Comment by Jal87 posted on FS: Porst 55mm f1.2 at 23/02/2013 - 21:11
I am selling my Porst Color Reflex MC Auto 55mm f1.2.
Additional items: 2 UV filters, 1 CPL filter, 3 in 1 rubber hood, front and rear caps.
Condition: The lens is in fully working order. Front and rear glasses do not have any dust, fungus or scratches. Aperture works well and oil free.
The lens was bought from ebay. I am selling it due to being unhappy with the sharpness. I am a beginner, I believe professionals can use the lens more effectively.
#PLEASE do not ask to send the lens first. I have described the condition very clearly. A video and some pictures below to make it more clear. Comparison between Pentax M 50mm f1.7 and Porst. I am open to offers more than £200 including RMSD (I will post on the same day), so I will take the best offer.
Video of the lens link
Porst at f1.2
Pentax M 50mm at f1.7
Porst at f2.8
Pentax M 50mm at f2.8
Additional items: 2 UV filters, 1 CPL filter, 3 in 1 rubber hood, front and rear caps.
Condition: The lens is in fully working order. Front and rear glasses do not have any dust, fungus or scratches. Aperture works well and oil free.
The lens was bought from ebay. I am selling it due to being unhappy with the sharpness. I am a beginner, I believe professionals can use the lens more effectively.
#PLEASE do not ask to send the lens first. I have described the condition very clearly. A video and some pictures below to make it more clear. Comparison between Pentax M 50mm f1.7 and Porst. I am open to offers more than £200 including RMSD (I will post on the same day), so I will take the best offer.
Video of the lens link
Porst at f1.2
Pentax M 50mm at f1.7
Porst at f2.8
Pentax M 50mm at f2.8
Comment by Jal87 posted on FS: Porst 55mm f1.2 at 23/02/2013 - 13:36
Algernon wrote:
That's good to hear. It's a pity he didn't tell you
what (if anything) was wrong.
It should be sharper than the 2 pics you've posted, but
at least it's not suffering from flare. It's better to use
a lens hood to get slightly better contrast.
Excellent lens especially at the price you paid.
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I think the sharpness issue is user error.That's good to hear. It's a pity he didn't tell you
what (if anything) was wrong.
It should be sharper than the 2 pics you've posted, but
at least it's not suffering from flare. It's better to use
a lens hood to get slightly better contrast.
Excellent lens especially at the price you paid.
-
I bought a lens hood and front cap on ebay since the lens came with a rear cap and UV filter.
The lens was a really good bargain
Regards,
Jalal
Comment by Jal87 posted on Please help at 13/02/2013 - 21:52
The problem is solved automatically/magically(?)
That's what happened basically: I explained my problem to the man in camera shop. He went inside (back room) for 4/5 minutes then came back and told me the mechanism was fine... I saw the aperture was closing down properly when he clicked the shutter. He then checked my camera with his auto focus lens and my Pentax M lens. He asked me if I use manual mode for manual lenses.
He took couple of pictures with Porst. And... yes I can see the difference among similar pictures taken in different apertures. He said he had never heard of Porst. Also said the aperture working as it meant to be but he was not happy with the optical quality of the lens. I thanked him then came home and took a few pictures and yes Porst was working like my Pentax M.
CURIOUSLY I SET "APERTURE RING SETTINGS" TO "PROHIBITED" AND THE SHUTTER DID NOT WORK. SO, YES TODAY THE LENS IS WORKING AS IT MEANT TO BE AND COMMUNICATING WITH MY CAMERA.
I think I should have asked him what he did in the back room, did he change any setting in my camera or did he do anything to the lever.
I just remembered that I charged my camera battery fully last night. I know this does not have anything with the aperture problem but just thought to mention it.
Here two pictures one at f1.2 and the other at f8.
f1.2
f8
Thank you guys for so many suggestions and informative links.
Best regards,
Jalal
That's what happened basically: I explained my problem to the man in camera shop. He went inside (back room) for 4/5 minutes then came back and told me the mechanism was fine... I saw the aperture was closing down properly when he clicked the shutter. He then checked my camera with his auto focus lens and my Pentax M lens. He asked me if I use manual mode for manual lenses.
He took couple of pictures with Porst. And... yes I can see the difference among similar pictures taken in different apertures. He said he had never heard of Porst. Also said the aperture working as it meant to be but he was not happy with the optical quality of the lens. I thanked him then came home and took a few pictures and yes Porst was working like my Pentax M.
CURIOUSLY I SET "APERTURE RING SETTINGS" TO "PROHIBITED" AND THE SHUTTER DID NOT WORK. SO, YES TODAY THE LENS IS WORKING AS IT MEANT TO BE AND COMMUNICATING WITH MY CAMERA.
I think I should have asked him what he did in the back room, did he change any setting in my camera or did he do anything to the lever.
I just remembered that I charged my camera battery fully last night. I know this does not have anything with the aperture problem but just thought to mention it.
Here two pictures one at f1.2 and the other at f8.
f1.2
f8
Thank you guys for so many suggestions and informative links.
Best regards,
Jalal
Comment by Jal87 posted on Please help at 13/02/2013 - 15:01
cabstar wrote:
Sounds like the aperture lever on the lens should have a spring on it and its broken... Check the positioning of the aperture lever on your porst and compare it to your m lens and i imagine it will be in a totally different place. So when its attached to the camera the camera will try to move the aperture lever but the lever is in the wrong place and so cannot move the aperture blades.
Thanks for your reply. I am not sure but i think there is a spring on it and not broken. Because when i move the lever to different positions it comes back to its original position. Here is a video showing three lenses you can see 1st lens is Porst, 2nd lens is M 50mm and 3rd lens is AF 50-200.Sounds like the aperture lever on the lens should have a spring on it and its broken... Check the positioning of the aperture lever on your porst and compare it to your m lens and i imagine it will be in a totally different place. So when its attached to the camera the camera will try to move the aperture lever but the lever is in the wrong place and so cannot move the aperture blades.
link
While M lens is wide open (f1.7) its lever is completely in the opposite side (left side) of Porst wide open (right side, as you can see in the video). AF lens' lever is in the same position (right side) as Porst but I can see that the aperture blades are closed (DA 50-200 does not have aperture ring). So you were absolutely right. Is it possible to fix it by myself or should I go to a repairing shop? I am thinking to go to a camera repairing shop tomorrow.
Comment by Jal87 posted on Please help at 12/02/2013 - 23:01
I just found a difference between Pentax M and Porst. When lenses are unmounted and I move the aperture ring, in Pentax M aperture lever moves with aperture ring. But in Porst the lever (only the lever, internal blades move) is stuck in the same position. Also in Porst I can easily move the lever with my finger but in Pentax M the lever only moves with aperture ring, feels hard to move with finger. Any idea?
My other Manual zoom 80-200mm lens' aperture lever also similar to my 50mm M lens
But my AF lens DA18-55 and 55-200 aperture lever is similar to Porst. Can this be the cause?
My other Manual zoom 80-200mm lens' aperture lever also similar to my 50mm M lens
But my AF lens DA18-55 and 55-200 aperture lever is similar to Porst. Can this be the cause?
Comment by Jal87 posted on Please help at 12/02/2013 - 21:05
Hi Dave, i read the article and tried stop down metering and DoF preview method. If I have not done wrong then none of them worked as no matter what the aperture was, the metering gave me the same shutter speed. DoF preview method showed the same exposure bar for all apertures. However, when I connect the lens with a teleconverter or extension tube, the aperture seems work. Thanks for the link. I will try to show my lens to a service centre and see what they suggest.
Algi thanks for the thread link. I have read 4 pages and it seems like comparisons among different f1.2 lenses. Nobody has mentioned similar problem. Thanks to all of you who commented here.
Algi thanks for the thread link. I have read 4 pages and it seems like comparisons among different f1.2 lenses. Nobody has mentioned similar problem. Thanks to all of you who commented here.
Comment by Jal87 posted on Please help at 12/02/2013 - 19:55
Algernon wrote:
There's only the aperture lever that communicates with
the camera nothing else.
Is this the one that sold for £131? If it is I would
keep it and just use it wide open and see if it rectifies
itself. It's worth at least £100 more than that and it
wouldn't cost that much to get it serviced.
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Just tried with teleconverter and macro extension tube and aperture works. Any suggestion please? Yes it says £131 on ebay but paypal converted 153+11 euro for postage as £147. £147 was too good for a f1.2 lens I know that's why i am double minded whether i should return it or not.There's only the aperture lever that communicates with
the camera nothing else.
Is this the one that sold for £131? If it is I would
keep it and just use it wide open and see if it rectifies
itself. It's worth at least £100 more than that and it
wouldn't cost that much to get it serviced.
-
Comment by Jal87 posted on Please help at 12/02/2013 - 16:34
Algernon wrote:
"Also I changed the "using aperture ring" option in menu setting to prohibited"
Have you changed that back?
You are probably better putting the Pentax M 50mm f1.7 back
on and making sure that everything works with that lens. If
it does the Porst must be faulty.
-
When the aperture ring setting is set to prohibited my Pentax M does not work, i mean the shutter does not work. But shutter works when its set to permitted. Also Pentax M works in all apertures. So I think Porst is not communicating with my camera. If there is no solution I have to return it but thats just extra hassle and postage fees will go to drain if the seller does not pay. The seller has not replied me yet. I dont have proper adapter for Nikon otherwise i could try with my brothers Nikon camera"Also I changed the "using aperture ring" option in menu setting to prohibited"
Have you changed that back?
You are probably better putting the Pentax M 50mm f1.7 back
on and making sure that everything works with that lens. If
it does the Porst must be faulty.
-
Comment by Jal87 posted on Please help at 12/02/2013 - 15:27
