I got my Seikanon lens stuck on my K20D

almo · 10-01-2014, 04:06 PM

I have searched for other threads on this but nothing I have seen says how to actually get the damn thing off the camera. I am at a complete loss here. I can get it about half way then it locks and will only turn slightly in either direction. If I play around with the focus mode selection I can get it seated in the locked position and the camera will work, but I can't get the lens off of the camera.

Please help.

stevebrot · 10-01-2014, 04:29 PM

Ricoh Pin perhaps?

Google "Ricoh Pin" and you will get links describing what may be jamming your lens in place along with hints on how to get it off. You can also do a search on this site.

Steve

Tanzer · 10-01-2014, 04:32 PM

Don't panic, and don't force it. You just met the Ricoh pin ... as Steve said, just do a google search for a few useful threads here, like this one:
https://www.pentaxforums.com/forums/58-troubleshooting-beginner-help/62194-ri...ed-remove.html

**c.a.m** · 10-01-2014, 04:42 PM

almo,

I'd suggest that you Google "Seikanon lens Ricoh pin." There's a good chance that the lens is fitted with a pin that has become engaged with the camera's autofocus shaft. The pin and shaft would be located at about the 4 or 5 o'clock position as seen when you look at the front of the camera.

This is not an uncommon problem, and the general approach is to use a feeler gauge or other thin metal strip to wiggle at the pin to move it out of its engaged position in the AF shaft recess. First, set the camera focus lever at the front of the camera to MF to disengage the AF shaft. You should be able to find numerous posts that describe the problem and present solutions.

The lens is possibly for a Ricoh mount - compatible mechanically with the Pentax K bayonet mount, but having the extra pin to communicate with certain Ricoh cameras.

- Craig

EDIT - I guess I was typing at the same time as the others above.

almo · 10-01-2014, 05:24 PM

I got it off!

Thanks guys!

**c.a.m** · 10-01-2014, 05:34 PM

Excellent!

Was it the pin ?

almo · 10-01-2014, 05:47 PM

Originally posted by c.a.m

Excellent!

Was it the pin ?

Sure were.

I didn't have shims, or gauge feelers, so I chopped up an Altoids can and used that. I never was able to get the homemade shims under the pin, so I tried using a jeweler's flat-head screw driver, a very small one, to pry the lens back slightly so I could hopefully clear the pin. No dice on that, but I guess one of the lens flanges cleared the smaller of the three flanges on the camera mount and it just fell out in my hands. I just plain didn't believe it. I sat here looking at the camera and the lens like a stooge for the longest time before it occurred to me to put my new 18-55 on and see if all was well. It was, and I am pretty grateful for it. Ironically enough both of my AF lenses I ordered for this camera came in the post today. For some reason I put that 28mm lens on before trying out either of them. Go figure.

**ramseybuckeye** · 10-01-2014, 07:11 PM

Originally posted by almo

Sure were.

I didn't have shims, or gauge feelers, so I chopped up an Altoids can and used that. I never was able to get the homemade shims under the pin, so I tried using a jeweler's flat-head screw driver, a very small one, to pry the lens back slightly so I could hopefully clear the pin. No dice on that, but I guess one of the lens flanges cleared the smaller of the three flanges on the camera mount and it just fell out in my hands. I just plain didn't believe it. I sat here looking at the camera and the lens like a stooge for the longest time before it occurred to me to put my new 18-55 on and see if all was well. It was, and I am pretty grateful for it. Ironically enough both of my AF lenses I ordered for this camera came in the post today. For some reason I put that 28mm lens on before trying out either of them. Go figure.

Good job on the ingenuity, Now look up how to remove the pin, it's pretty easy to do. But if possible get a JIS screwdriver, a phillips may slip and gink up the screw.

almo · 10-01-2014, 07:53 PM

Originally posted by ramseybuckeye

Good job on the ingenuity, Now look up how to remove the pin, it's pretty easy to do. But if possible get a JIS screwdriver, a phillips may slip and gink up the screw.

Sadly the lens did not survive the process of removal.

Oddly enough it would seem that glass lenses don't get along very well with concrete floors.

**ramseybuckeye** · 10-01-2014, 08:00 PM

Originally posted by almo

Sadly the lens did not survive the process of removal.

Oddly enough it would seem that glass lenses don't get along very well with concrete floors.

OOPS, At least it wasn't the camera!

almo · 10-01-2014, 08:07 PM

Originally posted by ramseybuckeye

OOPS, At least it wasn't the camera!

My thoughts exactly!

Venom3300 · 10-01-2014, 09:09 PM

that will buff out. give it the ole lens pen treatment.

almo · 10-01-2014, 09:21 PM

Originally posted by Venom3300

that will buff out. give it the ole lens pen treatment.

I pretty sure when the lens pen goes through the front element it's a bit more serious than that

dakight · 10-02-2014, 05:51 AM

Just think of it as an exotic special effects filter; I'm sure the results will be interesting.

**c.a.m** · 10-02-2014, 06:27 AM

Ouch. Hopefully it is not one of your favourite lenses.

You could list it for auction and describe the lens as having "...minor cleaning marks on the front element...shouldn't affect IQ" (just kidding)

10-01-2014, 04:06 PM	#1
almo Senior Member Join Date: Jan 2008 Location: Flawda Posts: 101	I got my Seikanon lens stuck on my K20D I have searched for other threads on this but nothing I have seen says how to actually get the damn thing off the camera. I am at a complete loss here. I can get it about half way then it locks and will only turn slightly in either direction. If I play around with the focus mode selection I can get it seated in the locked position and the camera will work, but I can't get the lens off of the camera. Please help.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
My CPC Auto Zoom lens got stuck on my K20D	mulberrybean	Pentax SLR Lens Discussion	6	10-01-2014 01:37 PM
Macro I've got my eye on you......	eaglem	Post Your Photos!	11	02-02-2014 07:17 PM
Just got my 50mm f1.8 lens and I have a question	David&karen	Pentax SLR Lens Discussion	8	01-10-2014 09:03 PM
Stuck filter on my DA*16-50mm - I need help!	jpzk	Pentax Camera and Field Accessories	39	01-12-2011 02:47 AM
T-mount adaptor stuck on my K20D...not this next week!	imtheguy	Pentax SLR Lens Discussion	23	09-18-2009 02:50 PM

10-01-2014, 04:29 PM	#2
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Ricoh Pin perhaps? Google "Ricoh Pin" and you will get links describing what may be jamming your lens in place along with hints on how to get it off. You can also do a search on this site. Steve

10-01-2014, 04:32 PM	#3
Tanzer Veteran Member Join Date: Mar 2012 Location: Perrineville, NJ Posts: 1,375	Don't panic, and don't force it. You just met the Ricoh pin ... as Steve said, just do a google search for a few useful threads here, like this one: https://www.pentaxforums.com/forums/58-troubleshooting-beginner-help/62194-ri...ed-remove.html

10-01-2014, 04:42 PM	#4
c.a.m Site Supporter Join Date: Jan 2013 Location: Ottawa, Canada Photos: Gallery \| Albums Posts: 4,189	almo, I'd suggest that you Google "Seikanon lens Ricoh pin." There's a good chance that the lens is fitted with a pin that has become engaged with the camera's autofocus shaft. The pin and shaft would be located at about the 4 or 5 o'clock position as seen when you look at the front of the camera. This is not an uncommon problem, and the general approach is to use a feeler gauge or other thin metal strip to wiggle at the pin to move it out of its engaged position in the AF shaft recess. First, set the camera focus lever at the front of the camera to MF to disengage the AF shaft. You should be able to find numerous posts that describe the problem and present solutions. The lens is possibly for a Ricoh mount - compatible mechanically with the Pentax K bayonet mount, but having the extra pin to communicate with certain Ricoh cameras. - Craig EDIT - I guess I was typing at the same time as the others above.

10-01-2014, 05:24 PM	#5
almo Senior Member Join Date: Jan 2008 Location: Flawda Posts: 101 Original Poster	I got it off! Thanks guys!

10-01-2014, 05:34 PM	#6
c.a.m Site Supporter Join Date: Jan 2013 Location: Ottawa, Canada Photos: Gallery \| Albums Posts: 4,189	Excellent! Was it the pin ?

10-01-2014, 05:47 PM	#7
almo Senior Member Join Date: Jan 2008 Location: Flawda Posts: 101 Original Poster	Originally posted by c.a.m Excellent! Was it the pin ? Sure were. I didn't have shims, or gauge feelers, so I chopped up an Altoids can and used that. I never was able to get the homemade shims under the pin, so I tried using a jeweler's flat-head screw driver, a very small one, to pry the lens back slightly so I could hopefully clear the pin. No dice on that, but I guess one of the lens flanges cleared the smaller of the three flanges on the camera mount and it just fell out in my hands. I just plain didn't believe it. I sat here looking at the camera and the lens like a stooge for the longest time before it occurred to me to put my new 18-55 on and see if all was well. It was, and I am pretty grateful for it. Ironically enough both of my AF lenses I ordered for this camera came in the post today. For some reason I put that 28mm lens on before trying out either of them. Go figure.

10-01-2014, 07:11 PM	#8
ramseybuckeye Site Supporter Join Date: Apr 2009 Location: Hampstead, NC Photos: Gallery Posts: 17,291	Originally posted by almo Sure were. I didn't have shims, or gauge feelers, so I chopped up an Altoids can and used that. I never was able to get the homemade shims under the pin, so I tried using a jeweler's flat-head screw driver, a very small one, to pry the lens back slightly so I could hopefully clear the pin. No dice on that, but I guess one of the lens flanges cleared the smaller of the three flanges on the camera mount and it just fell out in my hands. I just plain didn't believe it. I sat here looking at the camera and the lens like a stooge for the longest time before it occurred to me to put my new 18-55 on and see if all was well. It was, and I am pretty grateful for it. Ironically enough both of my AF lenses I ordered for this camera came in the post today. For some reason I put that 28mm lens on before trying out either of them. Go figure. Good job on the ingenuity, Now look up how to remove the pin, it's pretty easy to do. But if possible get a JIS screwdriver, a phillips may slip and gink up the screw.

10-01-2014, 07:53 PM	#9
almo Senior Member Join Date: Jan 2008 Location: Flawda Posts: 101 Original Poster	Originally posted by ramseybuckeye Good job on the ingenuity, Now look up how to remove the pin, it's pretty easy to do. But if possible get a JIS screwdriver, a phillips may slip and gink up the screw. Sadly the lens did not survive the process of removal. Oddly enough it would seem that glass lenses don't get along very well with concrete floors.

10-01-2014, 08:00 PM	#10
ramseybuckeye Site Supporter Join Date: Apr 2009 Location: Hampstead, NC Photos: Gallery Posts: 17,291	Originally posted by almo Sadly the lens did not survive the process of removal. Oddly enough it would seem that glass lenses don't get along very well with concrete floors. OOPS, At least it wasn't the camera!

10-01-2014, 08:07 PM	#11
almo Senior Member Join Date: Jan 2008 Location: Flawda Posts: 101 Original Poster	Originally posted by ramseybuckeye OOPS, At least it wasn't the camera! My thoughts exactly!

Thread Tools	Search this Thread
	Search this Thread: Advanced Search

10-01-2014, 09:09 PM	#12
Venom3300 Veteran Member Join Date: Jul 2014 Posts: 714	that will buff out. give it the ole lens pen treatment.

10-01-2014, 09:21 PM	#13
almo Senior Member Join Date: Jan 2008 Location: Flawda Posts: 101 Original Poster	Originally posted by Venom3300 that will buff out. give it the ole lens pen treatment. I pretty sure when the lens pen goes through the front element it's a bit more serious than that

10-02-2014, 05:51 AM	#14
dakight Veteran Member Join Date: Sep 2014 Location: Phoenix, AZ Photos: Albums Posts: 1,216	Just think of it as an exotic special effects filter; I'm sure the results will be interesting.

10-02-2014, 06:27 AM	#15
c.a.m Site Supporter Join Date: Jan 2013 Location: Ottawa, Canada Photos: Gallery \| Albums Posts: 4,189	Ouch. Hopefully it is not one of your favourite lenses. You could list it for auction and describe the lens as having "...minor cleaning marks on the front element...shouldn't affect IQ" (just kidding)