Originally posted by Chaitanya I have Vivitar 28mm f/2.8 lens that has a PK-A/R tag, I read that some pins need to be removed in order these lens to work with Pentax D-SLR. I am currently using this lens on ME_Super and Chinon CM-5 without any glitches. I am posting links to images of that lens.
Side view:
Vivitar Pictures, Vivitar Images, Vivitar Photos, Vivitar Videos - Image - TinyPic - Free Image Hosting, Photo Sharing & Video Hosting
Top View:
Vivitar Pictures, Vivitar Images, Vivitar Photos, Vivitar Videos - Image - TinyPic - Free Image Hosting, Photo Sharing & Video Hosting
Mount View:
Image - TinyPic - Free Image Hosting, Photo Sharing & Video Hosting
Thanking You in advance.
You may have the similar lens that I have. The PK-A/R lens works for both Pentax K mount with A and it also works on Ricoh xr camera that have 'P' pin for Ricoh programmed mode. The lens that you have is a hybrid lens that can work on Av and programmed mode in both Pentax and Ricoh bodies.
Many people suggest to remove the pin. I on the other hand will suggest to
check first if the Ricoh pin is of ball-head type and that it is retractable. If the pin is indeed retractable and of ball head type (check picture below for reference), you have much less of a risk in jamming your lens into the AF connector on a digital Pentax body. If you intend to use the lens on a Pentax MF film camera, there is no worry at all as the AF connector is absent in the Manual focus film camera as in Pentax SuperProgram or Pentax MX/ME/K1000 etc.
Ricoh p-pin that is retractable and of ball head type
You can read more on my blogs on
I have 2 primes and 2 zooms that have these Ricoh p pins and I did not remove the pin in any of them as I also have a Ricoh xr-p film camera to rightly use the Rioch p pin. I have used the 2 primes on my K-x, K20D and K10D cameras with no issue.
As I see it, there is some risk present with the potential in jamming the pin into the AF connector on body, you have to make the call. But usually, the quick and effective remedy is to careful wiggle while switching AF<->MF switch on body to push the pin back into the lens while wiggling your lens from the mount.
summaries- PK-A/R ---> hybrid lens with A setting for Pentax and P (programmed) mode in Ricoh. Those are the gem in Hin's LBA lens collection.
- R/K ---> Ricoh K mount. These may have the P pin, look at aperture ring in the A position, a letter P instead of A will indicate a Ricoh K mount with P pin
- if P pin is i) ball head ii) retractable --> should be safe, but some minor risk is involved in jamming
- if P pin is i) non-retractable ii) looks like a stick instead of a ball head --> likely to jam, UNSAFE for AF digital and film bodies
- Ricoh P pin only jams in AF bodies, they won't jam on MF bodies
- Removing P pin is one option
- Quick and effective remedy to jamming: wiggle lens gently while switching the AF/MF switch to push the pin back
Thanks,
Hin