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AquaDome · 01-28-2017, 05:14 PM

Contact me if you decide you want to sell it. I could have a use for that "Holga" effect.

**Digitalis** · 01-28-2017, 07:15 PM

Originally posted by pschlute

rear element problems are more serious than front element ones. But it would not cause the problems you are experiencing.

I agree, a scratch might appear in bokeh or lower contrast at close focusing distances. It wouldn't produce this:

WestBug · 01-29-2017, 06:26 AM

Whoa ! Reversed element somewhere for sure. I had the same problem and sent mine to Erik for CLA. Now its nice and sharp.

Bui · 01-30-2017, 11:49 AM

Thanks a lot for your help. So for now I will be positive and treat it as a "special" lens while waiting for an occasion to try fixing it. Maybe I will ask the seller to return it but I think he doesn't know anything about old lens, and I didn't pay too much.

---------- Post added 01-30-17 at 11:50 AM ----------

Originally posted by AquaDome

Contact me if you decide you want to sell it. I could have a use for that "Holga" effect.

Thank you, I can sell it to you if you like it but I'm not living in the US, not sure if it's worth our effort :-)

stevebrot · 01-30-2017, 01:19 PM

Originally posted by pschlute

Given the scratch too I would demand a full refund.

The A 28mm 2.8 is a very common lens, you will find a (decent) replacement very quickly.

What Peter said ^ ^ ^

...with emphasis on the ready availability of an inexpensive replacement. 1980s vintage 28mm lenses, particularly major brands and prominent 3rd-party, offer consistently high optical quality and reasonable pricing.

Steve

Bui · 02-23-2017, 03:31 PM - **1 Like**

So I decided to try my luck with repairing the lens today. After removing the outer ring, there were the 3 front elements which are attached to the same tube, after that I saw the aperture blades, and behind them lied the back elements. I removed each of the 3 front elements, there was no one that is placed back-to-front. I put them back, screwed back the tube containing them. I didn't touch the back elements yet as they look a bit complicated too me. For some unknown reason I decided to put the lens back to the camera and fire some shots. The problem, the "holga" effect has disappeared.

Weird, but I think the only logical reason is one of the 3 fronts elements, or the tube that they were put it, were not screwed deep enough before, thus made the lens behave very strangely.

Anyway I can enjoy it now.

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01-28-2017, 05:14 PM	#16
AquaDome Veteran Member Join Date: Jan 2014 Location: New Carlisle, IN Photos: Gallery \| Albums Posts: 1,475	Contact me if you decide you want to sell it. I could have a use for that "Holga" effect.

01-28-2017, 07:15 PM	#17
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,695	Originally posted by pschlute rear element problems are more serious than front element ones. But it would not cause the problems you are experiencing. I agree, a scratch might appear in bokeh or lower contrast at close focusing distances. It wouldn't produce this:

01-29-2017, 06:26 AM	#18
WestBug Inactive Account Join Date: Jan 2017 Posts: 93	Whoa ! Reversed element somewhere for sure. I had the same problem and sent mine to Erik for CLA. Now its nice and sharp.

01-30-2017, 11:49 AM	#19
Bui Veteran Member Join Date: Nov 2016 Photos: Gallery Posts: 316 Original Poster	Thanks a lot for your help. So for now I will be positive and treat it as a "special" lens while waiting for an occasion to try fixing it. Maybe I will ask the seller to return it but I think he doesn't know anything about old lens, and I didn't pay too much. ---------- Post added 01-30-17 at 11:50 AM ---------- Originally posted by AquaDome Contact me if you decide you want to sell it. I could have a use for that "Holga" effect. Thank you, I can sell it to you if you like it but I'm not living in the US, not sure if it's worth our effort :-)

01-30-2017, 01:19 PM	#20
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by pschlute Given the scratch too I would demand a full refund. The A 28mm 2.8 is a very common lens, you will find a (decent) replacement very quickly. What Peter said ^ ^ ^ ...with emphasis on the ready availability of an inexpensive replacement. 1980s vintage 28mm lenses, particularly major brands and prominent 3rd-party, offer consistently high optical quality and reasonable pricing. Steve

02-23-2017, 03:31 PM - 1 Like	#21
Bui Veteran Member Join Date: Nov 2016 Photos: Gallery Posts: 316 Original Poster	So I decided to try my luck with repairing the lens today. After removing the outer ring, there were the 3 front elements which are attached to the same tube, after that I saw the aperture blades, and behind them lied the back elements. I removed each of the 3 front elements, there was no one that is placed back-to-front. I put them back, screwed back the tube containing them. I didn't touch the back elements yet as they look a bit complicated too me. For some unknown reason I decided to put the lens back to the camera and fire some shots. The problem, the "holga" effect has disappeared. Weird, but I think the only logical reason is one of the 3 fronts elements, or the tube that they were put it, were not screwed deep enough before, thus made the lens behave very strangely. Anyway I can enjoy it now.

Incredible corner softness of my Pentax A 28mm f2.8

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