Sears 2.8 135mm lens N0 860606352

John Tyler · 12-06-2019, 09:01 AM

I have this lens from the old 35mm days. Is it possible to use this on my K3ii? I know it won't mount directly..and by that it will go onto the body but will not lock into place. I tried it on my K20..not my K3ii.
Any suggestions?

Not a Number · 12-06-2019, 09:24 AM

The shield/flange for the aperture control lever may be too large and is hitting the power zoom contacts in the mirror box. If that is the case remove the flange when possible otherwise you have to cut/grind down the flange. Compare to other K-mount lenses that fit.

**pepperberry farm** · 12-06-2019, 09:26 AM

depends upon which Sears 135/2.8 - I had a Sears 135/2.8 Macro that was manufactured by Samyang and it fit/worked perfectly on my K-50 and K-3....

.a.t. · 12-06-2019, 11:55 AM

Originally posted by John Tyler

. . . Any suggestions?

Welcome, John. In addition to your mounting issue, there may possibly be an un-mounting issue as well.

Do you know about the "Ricoh pin"? If your 135 has "KR" on its aperture ring, your lens might have a Ricoh pin which can get the lens stuck on Pentax autofocus bodies.

Before you try to mount your lens again, I suggest you read this blog entry:
theatre of noise: Ricoh Lenses On Pentax Cameras -- The Ricoh Pin Fix

Not a Number · 12-06-2019, 12:02 PM

Photos of the mount on the lens would be very helpful

John Tyler · 12-07-2019, 12:57 PM

I have attached some photos..the mounting does look a lot different then from my other lenses?? I hope this is the correct lens to use on my Pentax..I gave away the other one I had!!!

**boriscleto** · 12-07-2019, 01:13 PM

Originally posted by John Tyler

I have attached some photos..the mounting does look a lot different then from my other lenses?? I hope this is the correct lens to use on my Pentax..I gave away the other one I had!!!

It's a PKA/R lens. It has both the Pentax A pin and the Ricoh P pin.

There is no aperture shield, is one to the bayonet flags bent? Or the aperture flag?

The Ricoh pin looks like a dangerous one too.

Not a Number · 12-07-2019, 01:39 PM

I've never seen an aperture control lever like that before. There are dozens of ball bearings around it. I'd hesitate to remove the mount for that reason. You'd have to remove the mount to disable the "Ricoh" pin.

Edit: The lever looks awfully big in terms of thickness and width compared to the levers on all my lenses. I suspect that is the problem.

**Just1MoreDave** · 12-07-2019, 04:44 PM

The ball bearings are probably not an issue. It looks like there is a chance they will explode once you take the mount off. The bearings have stayed in place on lenses I have taken apart with that ring of bearings.
So I'd take off the mount and disable the Ricoh pin. I don't know what else would keep the lens from locking.

Not a Number · 12-07-2019, 11:00 PM

Originally posted by Just1MoreDave

So I'd take off the mount and disable the Ricoh pin. I don't know what else would keep the lens from locking

It's a moot point since the lens won't mount and lock on the DSLR in the first place.

John Tyler · 12-08-2019, 12:21 AM

I'm not going to use it an risk messing up my K3ii...that is why I tried it on my old non functioning K20 first. Thanks everyone!!!

Not a Number · 12-08-2019, 09:21 AM

You could probably use it with a KA teleconverter - contacts but no AF drive and power zoom contacts. I'm pretty sure the oversized lever is the problem.

12-06-2019, 09:01 AM	#1
John Tyler New Member Join Date: Nov 2019 Location: Red Bank, NJ Posts: 5	Sears 2.8 135mm lens N0 860606352 I have this lens from the old 35mm days. Is it possible to use this on my K3ii? I know it won't mount directly..and by that it will go onto the body but will not lock into place. I tried it on my K20..not my K3ii. Any suggestions?

12-07-2019, 12:57 PM	#6
John Tyler New Member Join Date: Nov 2019 Location: Red Bank, NJ Posts: 5 Original Poster	I have attached some photos..the mounting does look a lot different then from my other lenses?? I hope this is the correct lens to use on my Pentax..I gave away the other one I had!!! Attached Images

12-07-2019, 01:39 PM	#8
Not a Number Moderator Join Date: Mar 2012 Location: Venice, CA Posts: 9,630	I've never seen an aperture control lever like that before. There are dozens of ball bearings around it. I'd hesitate to remove the mount for that reason. You'd have to remove the mount to disable the "Ricoh" pin. Edit: The lever looks awfully big in terms of thickness and width compared to the levers on all my lenses. I suspect that is the problem. Last edited by Not a Number; 12-07-2019 at 01:45 PM.

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12-06-2019, 09:24 AM	#2
Not a Number Moderator Join Date: Mar 2012 Location: Venice, CA Posts: 9,630	The shield/flange for the aperture control lever may be too large and is hitting the power zoom contacts in the mirror box. If that is the case remove the flange when possible otherwise you have to cut/grind down the flange. Compare to other K-mount lenses that fit.

12-06-2019, 09:26 AM	#3
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 35,809	depends upon which Sears 135/2.8 - I had a Sears 135/2.8 Macro that was manufactured by Samyang and it fit/worked perfectly on my K-50 and K-3....

12-06-2019, 11:55 AM	#4
.a.t. Pentaxian Join Date: Mar 2011 Location: yesterday Photos: Gallery Posts: 1,230	Originally posted by John Tyler . . . Any suggestions? Welcome, John. In addition to your mounting issue, there may possibly be an un-mounting issue as well. Do you know about the "Ricoh pin"? If your 135 has "KR" on its aperture ring, your lens might have a Ricoh pin which can get the lens stuck on Pentax autofocus bodies. Before you try to mount your lens again, I suggest you read this blog entry: theatre of noise: Ricoh Lenses On Pentax Cameras -- The Ricoh Pin Fix

12-06-2019, 12:02 PM	#5
Not a Number Moderator Join Date: Mar 2012 Location: Venice, CA Posts: 9,630	Photos of the mount on the lens would be very helpful

12-07-2019, 01:13 PM	#7
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,223	Originally posted by John Tyler I have attached some photos..the mounting does look a lot different then from my other lenses?? I hope this is the correct lens to use on my Pentax..I gave away the other one I had!!! It's a PKA/R lens. It has both the Pentax A pin and the Ricoh P pin. There is no aperture shield, is one to the bayonet flags bent? Or the aperture flag? The Ricoh pin looks like a dangerous one too.

12-07-2019, 04:44 PM	#9
Just1MoreDave Site Supporter Join Date: Feb 2007 Location: Aurora, CO Photos: Gallery \| Albums Posts: 6,160	The ball bearings are probably not an issue. It looks like there is a chance they will explode once you take the mount off. The bearings have stayed in place on lenses I have taken apart with that ring of bearings. So I'd take off the mount and disable the Ricoh pin. I don't know what else would keep the lens from locking.

12-07-2019, 11:00 PM	#10
Not a Number Moderator Join Date: Mar 2012 Location: Venice, CA Posts: 9,630	Originally posted by Just1MoreDave So I'd take off the mount and disable the Ricoh pin. I don't know what else would keep the lens from locking It's a moot point since the lens won't mount and lock on the DSLR in the first place.

12-08-2019, 12:21 AM	#11
John Tyler New Member Join Date: Nov 2019 Location: Red Bank, NJ Posts: 5 Original Poster	I'm not going to use it an risk messing up my K3ii...that is why I tried it on my old non functioning K20 first. Thanks everyone!!!

12-08-2019, 09:21 AM	#12
Not a Number Moderator Join Date: Mar 2012 Location: Venice, CA Posts: 9,630	You could probably use it with a KA teleconverter - contacts but no AF drive and power zoom contacts. I'm pretty sure the oversized lever is the problem.

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