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Message |
    
York_praktica_fan
Tinkerer
Username: York_praktica_fan
Post Number: 9
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, January 17, 2007 - 08:53 am: | 
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Hi all
I've recently bought a 135mm Sirius branded lens via eBay as it was advertised as KA and pentax dgital compatable. The lens is however marked KR, and has the Auto selector marked A(P) which I suspect means it is a Ricoh KR pattern lens.
Testing it first on my trusty pentax P30 I found it to be entirely compatible - picking up and registering as an A lens.
But the flipping thing won't even mount on my pentax *ist DL2 (sorry to foul the forum by mentioning digital!)
i seem to remember having read somewhere that there were issues of incompatability between penatx K and KA and Ricoh K and KR(?) lenses - can any one shed any light on this? |
Anirban
Tinkerer
Username: Anirban
Post Number: 8
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, January 27, 2007 - 12:15 pm: |
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Hi,
This is a known issue -- the made-for-Ricoh lens has an extra pin that causes problems with Pentax DSLRs. You can search photo.net for more information.
Regards,
Anirban |
York_praktica_fan
Tinkerer
Username: York_praktica_fan
Post Number: 12
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, February 07, 2007 - 08:58 am: |
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Anirban
thanks for getting back to me on this - sorry I've been so slow in thanking you but to be honest I'd forgotten i'd posted this here as well as on "Manual Focus Forum"
Just to let you know I have succesfully de-Ricohed a Vivitar 35mm, although I have yet had the time to tackle the Sirius 135 - but I do have week off next week!
Thanks
Stephen |
Simon1970
Tinkerer
Username: Simon1970
Post Number: 2
Registered: 04-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, April 02, 2007 - 10:11 pm: |
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Hi Stephen,
If you do come across with a Ricoh P-KA lens, my advice is to stay away from them, the extra pin will permanently damage your *ist DL.
The little sensors on your lens mount are designed to be used with Pentax KA-FA lens, that gives you aperture priority. If any of those pins are damaged the aperture priority mode will be permanently disabled. |
Leesobing
Tinkerer
Username: Leesobing
Post Number: 57
Registered: 01-2008
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, March 27, 2010 - 02:35 am: |
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RK mount lens mainly XP serious has golden pin in the mount just remove it then can usinf in PENTAX DSLR
ttp://www.pentaxforums.com/forums/pentax-beginners-corner-q/62194-ricoh-pin-what-why-n eed-remove.html |
