Repair Canon 50mm f1.8?

[cassel]

So I've been shooting with a new-to-me Canon 7. I really like it, especially the viewfinder. The camera came with a 50mm f1.8 that had the dreaded internal haze. Otherwise the lens is in great shape-smooth focus and click stops. I shot a test roll and all the pictures came back blurry- out of focus.

So, then I had a CLA performed on the camera body and asked them to look at the lens at the same time. The lens was dis-assembled and they were able to clean 90% of the haze away. It looked like the problem was solved! So I shot another test roll....and no luck; still blurry and out of focus. I have tried two other lenses on the camera to make sure it wasn't a camera issue and those pictures came out fine.

My questions- should I send the lens to another repair shop? Is it a lost cause? Who would you recommend?

 

[sevo]

Haze reduces contrast, it does not cause pictures to be out of focus - so there is something else wrong with the lens.

 

[cassel]

That's what I figured too, so is it fixable? Who might look at it and fix it?

 

[Mablo]

Canon 50mm/1.8 like most Canon LTM lenses are quite easy to take apart at home. You just need a simple lens tool. There are threads about the subject here and elsewhere.

 

[rlouzan]

Focal Point
John Van Stelton

http://www.focalpointlens.com/fp_intro.html

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[rlouzan]

http://jelabs.blogspot.com.es/2011/04/canon-serenar-f18-50mm-ltm-lens.html

http://nelsonfoto.com/SMF/index.php?topic=24501.0

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[ampguy]

I would have DAG or someone who does these all the time. It's been mentioned that this lens, whenever lubed, will lead to haze on the glass in just a matter of time, so perhaps inquire about either not lubing the lens, or realizing you'll need to clean it regularly.

If it's not focusing, and other lens are, then that's another issue.

 

[John Shriver]

Could be an improperly seated lens element.

 

[Landshark]

If the 7 has a swing open back, you can check focus with a ground glass or even a piece of wax paper held against the film rails.
If the lens will focus correctly on that surface it may be RF alignment

 

[N. Bruce Nelson]

Although they tend to be relatively inexpensive, mine is good enough that I would be inclined to try and have it repaired if I could. My results with it stand out, even in the company of a Canon 1.4, a VC 1.5, and a Jupiter 3. Good luck and let us know what happens.

 

[sanmich]

you can check lens calibration by shooting a "ruler test".
make a small sign on a ruler, take pictures of the ruler at 45 degrees and check where the sharp range is, compared to the sign.

 

[randomm]

It might be that the helicoid has been disassembled wrong (with a wrong startpoint), or indeed that one element there is not seated properly. Both of these are very quick to remedy. If you are not prepared to tinker with it yourself, then send it to a reputable repair shop. Where are you?

 

[cassel]

A year has passed and this lens is still sitting on the shelf...I am not far from Camera Techs in Ballard, Seattle. I will give repair a shot. I would like to use this lens on a new-to-me Canon L3.

 

[tbhv55]

A year has passed and this lens is still sitting on the shelf...I am not far from Camera Techs in Ballard, Seattle. I will give repair a shot. I would like to use this lens on a new-to-me Canon L3.

And now another year has passed!😉 Did your lens ever get repaired? I hope so... the Canon 50mm f/1.8 RF is a very nice lens, so I hope that yours is being used.🙂

If you repaired it yourself, I'd be interested in knowing how easy/difficult it was, since I'm considering dismantling mine, to overhaul it. My example is fine optically, but has a little slack in the focus ring, and the aperture ring is rather stiff to operate.

Any advice would be greatly appreciated.

 

[cassel]

I never did get repaired- Camera Techs found it beyond help- damaged internal glass. I sold it at a camera show in Seattle for $50. Got another- older style 50mm Canon and they are great!