Old lenses on new cameras

Old lenses on new cameras.
While i am a specialized Pentax user, I also use other brand lenses with other kind of mounts.
Especially M42 and PK* lenses.
To do this, you need an adapter to convert M42 to K* mount ( * also referred as PK mount )
PK* lenses can be mounted without an adapter, but also with this type of lenses, there are many different kind of mounts -> electrical contacts, an A setting on the lens, a switch for manual/auto, metal latches in the mount and hand controlled apertures
Doing this for a while now, i came across a few problems.
But also if you have another brand of camera, you’ll need adapters and can come across coupling problems either electrical or mechanical.
For this I started this topic, and I will complement the article depending on problems I encounter, and thus be supplemented in time.


 

Brand and type of lens :
SMC Pentax M
Test lens :
SMC Pentax M 1:4 200mm
Test Camera :
Pentax K3 and K5
Problem :
Aperture cannot be set.
Status of problem :
Solved.

SAM_3307

The following problem concerns an aperture problem with an old M type Pentax lens.
Although many solutions found on the internet, only one really works.
Two settings need to be changed in your camera, and you also need to set the camera in manual mode to work.
I have included the video I have found with the correct settings you need :

Thanks to Prime StudiosĀ https://www.youtube.com/user/mrjon2069/videos


Brand and type of lens :
Mamiya Sekor auto SX 50mm f2.0
Test lens :
not applicable
Test Camera :
not applicable
Problem :
mount problem
Status of problem :
unusable

Nowadays, before buying new lenses, I always look on the Internet to see if I can find any information about a particular lens.
This way i can prevent mounting problems before really having them.
Today I stumbled upon an M42 Mamiya Sekor Auto SX 50mm f2.0 and two other Mamiya lenses, a 35 and 135mm.
Searching the web learned me two things:
The aperture ring sticks out a bit at the back of the lens, and there is a little nodge ( pin ) sticking out the outer aperture ring ( see pictures )
Therefore, these lenses are to be avoided, because they will not mount your M42 adapter close enough.

lensinfo and pictures found @ :

http://allphotolenses.com/lenses/item/c_3338.html]Lens Mamiya/Sekor SX 50 mm f/ 2 Auto


 

Brand and type of lens :
Lens B&T
Test lens :
Lens spec.
Test Camera :
Camera
Problem :
Problem
Status of problem :
Status

 


 

Brand and type of lens :
Lens B&T
Test lens :
Lens spec.
Test Camera :
Camera
Problem :
Problem
Status of problem :
Status


 

Brand and type of lens :
Lens B&T
Test lens :
Lens spec.
Test Camera :
Camera
Problem :
Problem
Status of problem :
Status

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