Rokinon 135 f2.8 lens with Pentax Kx

wildbaron1234 · 01-11-2012, 06:52 PM

Hello folks,

I am new to this forum. I am a recent entrant to the DSLR club and still taking baby steps. I bought a used lens off ebay, a Rokinon 135 mm f2.8 lens with a k-mount to be used with a Pentax Kx. I have been having trouble mounting it. However I play around with it, it just won't fit right. Any knowledge or pointers about this lens would be greatly appreciated.

Thank you for your time.

ducdao · 01-11-2012, 06:55 PM

Originally posted by wildbaron1234

Hello folks,

I am new to this forum. I am a recent entrant to the DSLR club and still taking baby steps. I bought a used lens off ebay, a Rokinon 135 mm f2.8 lens with a k-mount to be used with a Pentax Kx. I have been having trouble mounting it. However I play around with it, it just won't fit right. Any knowledge or pointers about this lens would be greatly appreciated.

Thank you for your time.

Welcome to the forum. Can you post a picture showing a close up of the mount?

TZH · 01-12-2012, 04:07 AM

Ebay seller might failed to verify the mount , I see this all the time.
The best way is to upload a photo.

JohnBee · 01-12-2012, 05:13 AM

Originally posted by wildbaron1234

Hello folks,

I am new to this forum. I am a recent entrant to the DSLR club and still taking baby steps. I bought a used lens off ebay, a Rokinon 135 mm f2.8 lens with a k-mount to be used with a Pentax Kx. I have been having trouble mounting it. However I play around with it, it just won't fit right. Any knowledge or pointers about this lens would be greatly appreciated.

Thank you for your time.

I was under the impression that the Rokinon 135 came in Minolta mount?

RioRico · 01-12-2012, 06:16 AM

Originally posted by JohnBee

I was under the impression that the Rokinon 135 came in Minolta mount?

Mine (serial # 141658) is in PK-M mount. The mount is not labeled. If ~~Ricoh made~~ Rokinon sold different versions, we'd indeed need to see a picture of the mount to tell just which it is.

EDIT: Correction in italics.

**boriscleto** · 01-12-2012, 06:33 AM

Originally posted by RioRico

Mine (serial # 141658) is in PK-M mount. The mount is not labeled. If Ricoh made different versions, we'd indeed need to see a picture of the mount to tell just which it is.

Rokinon, not Rikenon. Rokinon was a reseller, just like Vivitar. They sold lenses in FD, F, and MD mounts for sure, not sure about PK. The only one I've seen listed is a 500mm mirror. The newer Rokinons are just rebadged Samyangs.

RioRico · 01-12-2012, 06:44 AM

Originally posted by boriscleto

Rokinon, not Rikenon. Rokinon was a reseller, just like Vivitar. They sold lenses in FD, F, and MD mounts for sure, not sure about PK. The only one I've seen listed is a 500mm mirror. The newer Rokinons are just rebadged Samyangs.

You're right, I mis-spoke (early morning confusion), and it's fixed. Yes, Rokinon (old days, like pre-AF) was the badge on lenses with Pentax mounts. My two Rokinons are 28/2.8 and 135/2.8, both PK-M mount.

PS: I hate the Rokinon name, just because it's so confusable with Rikenon. Seems like a cheap rip-off name, like photo gear labeled Pantex or Nokon or Cannon, or a Fendar guitar. [/me grumbles & whines]

Last edited by RioRico; 01-12-2012 at 06:51 AM.

wildbaron1234 · 01-12-2012, 06:57 AM

[IMG]C:\Documents and Settings\n546137\My Documents\Downloads\photo.jpg[/IMG]

Thanks for the info folks. I bought it with the impression that it was an RK mount, which would fit a Kx. Anyway, here is a photo of the lens. I have marked the mount flanges. Please let me know what you guys think.

Thank you.

martyd14 · 01-12-2012, 07:04 AM

iF YOU ARE HAVING TROUBLE GETTING IT ON THOUGH...DO NOT FORCE IT!!
I had a small panic last weekend from an older Focal MC lens that had a Ricoh pin...well not really but it had a pin that once i did get it on...well a hacksaw got involved. If it does not fit do not force it. Big lesson learned for me.

claimed4all · 01-12-2012, 07:21 AM

Originally posted by martyd14

iF YOU ARE HAVING TROUBLE GETTING IT ON THOUGH...DO NOT FORCE IT!!
I had a small panic last weekend from an older Focal MC lens that had a Ricoh pin...well not really but it had a pin that once i did get it on...well a hacksaw got involved. If it does not fit do not force it. Big lesson learned for me.

Hacksaw involved? We must see aftermath pictures!

martyd14 · 01-12-2012, 07:43 AM

Man i wish i had pics of it but after the 2 hours of trying to twist, disassemble and finally cut this lens in half and then having it finally just pop off with a yank in the right direction...well that lens got tossed quick. this thing was solid metal and was made like a tank. wish it would have fit! No harm to the K-x at least

bluestringer · 01-12-2012, 07:44 AM

The image is not showing. I have a Kalimar lens PK-R mount that would not fit because the flange that protects the aperture lever was too big. I removed the 2 small screws holding the flange and removed it. Works fine now. Don't know if that is your problem or not. If it is a PK mount, that would be something to look at. Also if it has the Ricoh pin, make sure to remove it before mounting.

wildbaron1234 · 01-12-2012, 08:16 AM

ducdao · 01-12-2012, 08:26 AM

Originally posted by wildbaron1234

Attachment 114218

THis is definitely not a K-mount lens. Looks like Canon or something.

There seem to have two aperture levers, K-mount only has 1.

**boriscleto** · 01-12-2012, 08:44 AM - **1 Like**

Not a Canon FD, it's an Olympus OM mount. Identifiable by the lens release and stop down buttons opposite each other.

01-11-2012, 06:52 PM	#1
wildbaron1234 New Member Join Date: Jan 2012 Location: South Carolina Posts: 4	Rokinon 135 f2.8 lens with Pentax Kx Hello folks, I am new to this forum. I am a recent entrant to the DSLR club and still taking baby steps. I bought a used lens off ebay, a Rokinon 135 mm f2.8 lens with a k-mount to be used with a Pentax Kx. I have been having trouble mounting it. However I play around with it, it just won't fit right. Any knowledge or pointers about this lens would be greatly appreciated. Thank you for your time.

01-12-2012, 06:16 AM	#5
RioRico Veteran Member Join Date: Jun 2008 Location: Limbo, California Posts: 11,263	Originally posted by JohnBee I was under the impression that the Rokinon 135 came in Minolta mount? Mine (serial # 141658) is in PK-M mount. The mount is not labeled. If ~~Ricoh made~~ Rokinon sold different versions, we'd indeed need to see a picture of the mount to tell just which it is. EDIT: Correction in italics. Last edited by RioRico; 01-12-2012 at 06:46 AM.

01-12-2012, 08:16 AM	#13
wildbaron1234 New Member Join Date: Jan 2012 Location: South Carolina Posts: 4 Original Poster	I am hoping this works

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01-11-2012, 06:55 PM	#2
ducdao Pentaxian Join Date: Dec 2009 Location: Montreal/Vermont Posts: 2,160	Originally posted by wildbaron1234 Hello folks, I am new to this forum. I am a recent entrant to the DSLR club and still taking baby steps. I bought a used lens off ebay, a Rokinon 135 mm f2.8 lens with a k-mount to be used with a Pentax Kx. I have been having trouble mounting it. However I play around with it, it just won't fit right. Any knowledge or pointers about this lens would be greatly appreciated. Thank you for your time. Welcome to the forum. Can you post a picture showing a close up of the mount?

01-12-2012, 04:07 AM	#3
TZH Senior Member Join Date: Aug 2010 Location: Kuala Lumpur Photos: Gallery \| Albums Posts: 118	Ebay seller might failed to verify the mount , I see this all the time. The best way is to upload a photo.

01-12-2012, 05:13 AM	#4
JohnBee Veteran Member Join Date: Sep 2008 Location: Newrfoundland Photos: Albums Posts: 4,667	Originally posted by wildbaron1234 Hello folks, I am new to this forum. I am a recent entrant to the DSLR club and still taking baby steps. I bought a used lens off ebay, a Rokinon 135 mm f2.8 lens with a k-mount to be used with a Pentax Kx. I have been having trouble mounting it. However I play around with it, it just won't fit right. Any knowledge or pointers about this lens would be greatly appreciated. Thank you for your time. I was under the impression that the Rokinon 135 came in Minolta mount?

01-12-2012, 06:33 AM	#6
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,475	Originally posted by RioRico Mine (serial # 141658) is in PK-M mount. The mount is not labeled. If Ricoh made different versions, we'd indeed need to see a picture of the mount to tell just which it is. Rokinon, not Rikenon. Rokinon was a reseller, just like Vivitar. They sold lenses in FD, F, and MD mounts for sure, not sure about PK. The only one I've seen listed is a 500mm mirror. The newer Rokinons are just rebadged Samyangs.

01-12-2012, 06:44 AM	#7
RioRico Veteran Member Join Date: Jun 2008 Location: Limbo, California Posts: 11,263	Originally posted by boriscleto Rokinon, not Rikenon. Rokinon was a reseller, just like Vivitar. They sold lenses in FD, F, and MD mounts for sure, not sure about PK. The only one I've seen listed is a 500mm mirror. The newer Rokinons are just rebadged Samyangs. You're right, I mis-spoke (early morning confusion), and it's fixed. Yes, Rokinon (old days, like pre-AF) was the badge on lenses with Pentax mounts. My two Rokinons are 28/2.8 and 135/2.8, both PK-M mount. PS: I hate the Rokinon name, just because it's so confusable with Rikenon. Seems like a cheap rip-off name, like photo gear labeled Pantex or Nokon or Cannon, or a Fendar guitar. [/me grumbles & whines] Last edited by RioRico; 01-12-2012 at 06:51 AM.

01-12-2012, 06:57 AM	#8
wildbaron1234 New Member Join Date: Jan 2012 Location: South Carolina Posts: 4 Original Poster	[IMG]C:\Documents and Settings\n546137\My Documents\Downloads\photo.jpg[/IMG] Thanks for the info folks. I bought it with the impression that it was an RK mount, which would fit a Kx. Anyway, here is a photo of the lens. I have marked the mount flanges. Please let me know what you guys think. Thank you.

01-12-2012, 07:04 AM	#9
martyd14 Forum Member Join Date: Apr 2010 Location: Erie, PA Photos: Gallery \| Albums Posts: 67	iF YOU ARE HAVING TROUBLE GETTING IT ON THOUGH...DO NOT FORCE IT!! I had a small panic last weekend from an older Focal MC lens that had a Ricoh pin...well not really but it had a pin that once i did get it on...well a hacksaw got involved. If it does not fit do not force it. Big lesson learned for me.

01-12-2012, 07:21 AM	#10
claimed4all Forum Member Join Date: Sep 2011 Location: Grand Rapids Michigan Posts: 96	Originally posted by martyd14 iF YOU ARE HAVING TROUBLE GETTING IT ON THOUGH...DO NOT FORCE IT!! I had a small panic last weekend from an older Focal MC lens that had a Ricoh pin...well not really but it had a pin that once i did get it on...well a hacksaw got involved. If it does not fit do not force it. Big lesson learned for me. Hacksaw involved? We must see aftermath pictures!

01-12-2012, 07:43 AM	#11
martyd14 Forum Member Join Date: Apr 2010 Location: Erie, PA Photos: Gallery \| Albums Posts: 67	Man i wish i had pics of it but after the 2 hours of trying to twist, disassemble and finally cut this lens in half and then having it finally just pop off with a yank in the right direction...well that lens got tossed quick. this thing was solid metal and was made like a tank. wish it would have fit! No harm to the K-x at least

01-12-2012, 07:44 AM	#12
bluestringer Veteran Member Join Date: Nov 2011 Location: Cotton fields of South Georgia Photos: Gallery Posts: 2,748	The image is not showing. I have a Kalimar lens PK-R mount that would not fit because the flange that protects the aperture lever was too big. I removed the 2 small screws holding the flange and removed it. Works fine now. Don't know if that is your problem or not. If it is a PK mount, that would be something to look at. Also if it has the Ricoh pin, make sure to remove it before mounting.

01-12-2012, 08:26 AM	#14
ducdao Pentaxian Join Date: Dec 2009 Location: Montreal/Vermont Posts: 2,160	Originally posted by wildbaron1234 Attachment 114218 THis is definitely not a K-mount lens. Looks like Canon or something. There seem to have two aperture levers, K-mount only has 1.

01-12-2012, 08:44 AM - 1 Like	#15
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,475	Not a Canon FD, it's an Olympus OM mount. Identifiable by the lens release and stop down buttons opposite each other.