"Optics Separation" is common with Pentax 50mm f/1.2 lens

Fenwoodian · 05-09-2015, 09:31 PM

Quote:

If you are seriously interested in repairing it/getting it repaired, drop me a PM. It's probably too advanced for a complete novice, but if you have some experience with lens repair, I could walk you through it.

Thank you for the kind offer. But I decided to send the lens back to the seller for a refund rather than have the separation repaired.

I have no doubt that I'll be eventually getting another copy of this lens. From my brief testing, the bokeh it produces wide open is just beautiful.

xiaochao8174 · 10-19-2015, 07:24 AM

Originally posted by Fenwoodian

The man who repairs my Pentax cameras and lenses is one of the leading experts in the USA in Pentax repairs.

I recently purchased a supposedly mint Pentax smc 50mm f1.2 k mount lens. Upon inspection, I found unusual markings inside the lens all along the outer edge of the glass (see photos).

Initially I thought that it might be mold, however I had never seen mold look quite like this before. I called my Pentax repair person and explained the concern. He declared that it was not mold, rather it was "optics separation"; and that can not be repaired.

He also said that this model Pentax lens often exhibits this problem and that he has seen a number of Pentax smc 50mm f1.2 k mount lenses with this malady.

Just thought that you might be interested in this just in case you are considering a purchase of this particular lens in the future.

Hi, Fenwoodian
Could you please repost your photos? My A85/1.4 has the similar issue, but I am not very sure whether it is mold or group elements separation. Thanks.

fsge · 05-28-2018, 04:44 AM

Hello,

I resurect this thread as I am interested in knowing who could fix lens separation, knowing focal points have closed...

Thank you

**niceshot** · 05-28-2018, 05:30 AM - **1 Like**

Seems to me, that if you send it to Eric and have it fixed by him you would have a perfect Lens.I would send it to him, or probable fix it my self. You probable could do it also just remember to mark the Lens for perfect centering and collimation. PS send it to Eric as he is Pentax certified. Good Luck

Fenwoodian · 05-29-2018, 12:23 PM

Originally posted by niceshot

Seems to me, that if you send it to Eric and have it fixed by him you would have a perfect Lens.I would send it to him, or probable fix it my self. You probable could do it also just remember to mark the Lens for perfect centering and collimation. PS send it to Eric as he is Pentax certified. Good Luck

Great advice. Thank you.

I did not know that Eric worked on lenses. I just thought that he worked on old Pentax "film" bodies.

Also, I seem to recall that every time I read any thread that mentioned Eric, that he was saying that he's all booked up and any new jobs that come in will have a long wait.

Please correct me if wrong on any of the above assumptions...

**jatrax** · 05-29-2018, 03:16 PM - **1 Like**

Originally posted by Fenwoodian

I did not know that Eric worked on lenses. I just thought that he worked on old Pentax "film" bodies.

He has repaired a number of lenses for me. 4 or 5 maybe.. Including one with lens separation. I have been pleased with his work. I do not know anything about him being booked up but I know he is retired so he may only take so much work.

I think @DCshooter does similar work but you would need to ask him.

There is also Advance Camera in Portland Oregon

**niceshot** · 05-29-2018, 04:15 PM - **1 Like**

Originally posted by Fenwoodian

Great advice. Thank you.

I did not know that Eric worked on lenses. I just thought that he worked on old Pentax "film" bodies.

Also, I seem to recall that every time I read any thread that mentioned Eric, that he was saying that he's all booked up and any new jobs that come in will have a long wait.

Please correct me if wrong on any of the above assumptions...

Seems someone beat to the correct answer, But I know he would also center the lens and collimate it. Either way good luck. Alternately you could shoot DCShooter a pm.

fsge · 05-30-2018, 05:42 AM

Just to be sure we speak about this Eric right?

Home-Pentaxs

**gofour3** · 05-30-2018, 08:34 AM - **1 Like**

Originally posted by Fenwoodian

Great advice. Thank you.

I did not know that Eric worked on lenses. I just thought that he worked on old Pentax "film" bodies.

Also, I seem to recall that every time I read any thread that mentioned Eric, that he was saying that he's all booked up and any new jobs that come in will have a long wait.

Please correct me if wrong on any of the above assumptions...

Yep Eric will also fix Pentax lenses in the 35mm, 645 & 6x7 formats. (He has done CLA's on numerous Pentax lenses for me)

What he won't work on is DSLR's and the 67ii bodies. Email him with what you are wanting to get fixed and he will respond in a couple days. Yes he is busy, but his work is excellent.

Phil.

---------- Post added 30-05-18 at 08:35 ----------

Originally posted by niceshot

Alternately you could shoot DCShooter a pm.

I believe he is no longer on the forum??

Phil.

**jatrax** · 05-30-2018, 09:26 AM

Originally posted by fsge

Just to be sure we speak about this Eric right?

That is correct.

Originally posted by gofour3

I believe he is no longer on the forum??

That is sad if true. His work with re-anodizing lenses was truly amazing.

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05-09-2015, 09:31 PM	#16
Fenwoodian Pentaxian Join Date: Apr 2015 Location: USA Photos: Gallery \| Albums Posts: 2,874 Original Poster	Quote: If you are seriously interested in repairing it/getting it repaired, drop me a PM. It's probably too advanced for a complete novice, but if you have some experience with lens repair, I could walk you through it. Thank you for the kind offer. But I decided to send the lens back to the seller for a refund rather than have the separation repaired. I have no doubt that I'll be eventually getting another copy of this lens. From my brief testing, the bokeh it produces wide open is just beautiful.

10-19-2015, 07:24 AM	#17
xiaochao8174 New Member Join Date: Jan 2013 Posts: 1	Originally posted by Fenwoodian The man who repairs my Pentax cameras and lenses is one of the leading experts in the USA in Pentax repairs. I recently purchased a supposedly mint Pentax smc 50mm f1.2 k mount lens. Upon inspection, I found unusual markings inside the lens all along the outer edge of the glass (see photos). Initially I thought that it might be mold, however I had never seen mold look quite like this before. I called my Pentax repair person and explained the concern. He declared that it was not mold, rather it was "optics separation"; and that can not be repaired. He also said that this model Pentax lens often exhibits this problem and that he has seen a number of Pentax smc 50mm f1.2 k mount lenses with this malady. Just thought that you might be interested in this just in case you are considering a purchase of this particular lens in the future. Hi, Fenwoodian Could you please repost your photos? My A85/1.4 has the similar issue, but I am not very sure whether it is mold or group elements separation. Thanks.

05-28-2018, 04:44 AM	#18
fsge Veteran Member Join Date: Jun 2010 Location: Genf Posts: 1,138	Hello, I resurect this thread as I am interested in knowing who could fix lens separation, knowing focal points have closed... Thank you

05-28-2018, 05:30 AM - 1 Like	#19
niceshot Site Supporter Join Date: Mar 2014 Location: NY Photos: Gallery Posts: 1,564	Seems to me, that if you send it to Eric and have it fixed by him you would have a perfect Lens.I would send it to him, or probable fix it my self. You probable could do it also just remember to mark the Lens for perfect centering and collimation. PS send it to Eric as he is Pentax certified. Good Luck

05-29-2018, 12:23 PM	#20
Fenwoodian Pentaxian Join Date: Apr 2015 Location: USA Photos: Gallery \| Albums Posts: 2,874 Original Poster	Originally posted by niceshot Seems to me, that if you send it to Eric and have it fixed by him you would have a perfect Lens.I would send it to him, or probable fix it my self. You probable could do it also just remember to mark the Lens for perfect centering and collimation. PS send it to Eric as he is Pentax certified. Good Luck Great advice. Thank you. I did not know that Eric worked on lenses. I just thought that he worked on old Pentax "film" bodies. Also, I seem to recall that every time I read any thread that mentioned Eric, that he was saying that he's all booked up and any new jobs that come in will have a long wait. Please correct me if wrong on any of the above assumptions...

05-29-2018, 03:16 PM - 1 Like	#21
jatrax Site Supporter Join Date: May 2010 Location: Washington Cascades Photos: Gallery \| Albums Posts: 12,991	Originally posted by Fenwoodian I did not know that Eric worked on lenses. I just thought that he worked on old Pentax "film" bodies. He has repaired a number of lenses for me. 4 or 5 maybe.. Including one with lens separation. I have been pleased with his work. I do not know anything about him being booked up but I know he is retired so he may only take so much work. I think @DCshooter does similar work but you would need to ask him. There is also Advance Camera in Portland Oregon

05-29-2018, 04:15 PM - 1 Like	#22
niceshot Site Supporter Join Date: Mar 2014 Location: NY Photos: Gallery Posts: 1,564	Originally posted by Fenwoodian Great advice. Thank you. I did not know that Eric worked on lenses. I just thought that he worked on old Pentax "film" bodies. Also, I seem to recall that every time I read any thread that mentioned Eric, that he was saying that he's all booked up and any new jobs that come in will have a long wait. Please correct me if wrong on any of the above assumptions... Seems someone beat to the correct answer, But I know he would also center the lens and collimate it. Either way good luck. Alternately you could shoot DCShooter a pm.

05-30-2018, 05:42 AM	#23
fsge Veteran Member Join Date: Jun 2010 Location: Genf Posts: 1,138	Just to be sure we speak about this Eric right? Home-Pentaxs

05-30-2018, 08:34 AM - 1 Like	#24
gofour3 Site Supporter Join Date: Oct 2008 Location: Vancouver, Canada Posts: 8,091	Originally posted by Fenwoodian Great advice. Thank you. I did not know that Eric worked on lenses. I just thought that he worked on old Pentax "film" bodies. Also, I seem to recall that every time I read any thread that mentioned Eric, that he was saying that he's all booked up and any new jobs that come in will have a long wait. Please correct me if wrong on any of the above assumptions... Yep Eric will also fix Pentax lenses in the 35mm, 645 & 6x7 formats. (He has done CLA's on numerous Pentax lenses for me) What he won't work on is DSLR's and the 67ii bodies. Email him with what you are wanting to get fixed and he will respond in a couple days. Yes he is busy, but his work is excellent. Phil. ---------- Post added 30-05-18 at 08:35 ---------- Originally posted by niceshot Alternately you could shoot DCShooter a pm. I believe he is no longer on the forum?? Phil.

05-30-2018, 09:26 AM	#25
jatrax Site Supporter Join Date: May 2010 Location: Washington Cascades Photos: Gallery \| Albums Posts: 12,991	Originally posted by fsge Just to be sure we speak about this Eric right? That is correct. Originally posted by gofour3 I believe he is no longer on the forum?? That is sad if true. His work with re-anodizing lenses was truly amazing.