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06-13-2016, 06:37 AM   #1
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Scratch

Hi,

Somehow I managed to get a scratch on the rear element of my
FA 50 1.4. It effects the picture quality.

What should I do?

Thanks!

06-13-2016, 08:02 AM   #2
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maybe you can replace it with one of a M 1.4? hopefully they are the same
06-13-2016, 09:23 AM   #3
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I actually do have that one of the radioactive ones.
06-13-2016, 09:44 AM   #4
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I assume you are talking about a Takumar? I was talking about one of these:
SMC Pentax-M 50mm F1.4 Reviews - M Prime Lenses - Pentax Lens Reviews & Lens Database
They show the same diagram:
SMC Pentax-FA 50mm F1.4 Reviews - FA Prime Lenses - Pentax Lens Reviews & Lens Database
You should be able to find one for around $50. But please, do not take my word for granted. Hopefully people that know more about lens repairs will give you advice

---------- Post added 06-13-16 at 09:47 AM ----------

Actually the takumar seems to have the same glasses too:
SMC/S-M-C/Super Takumar 50mm F1.4 Reviews - M42 Screwmount Normal Primes - Pentax Lens Reviews & Lens Database
I have no idea whether they are interchangeable or not, however.

06-13-2016, 09:53 AM   #5
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Is it worth it to ruin my radioactive one that one was a bit expensive and does take very good photos (still need to get some yellow out of it),
or just buy the M one hopefully cheap?

I read an article take a sharpie and fill in the line with ink and it won't show up (?).
06-17-2016, 04:18 AM   #6
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I'd ignore a scratch and web advice, it is well risky swapping glass between lenses even with the same name plate there is no warrenty it is the same radia, thickness or formula.

Every chance of a Frankstein lens...
06-23-2016, 07:21 PM   #7
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QuoteOriginally posted by condor27596 Quote
Hi,

Somehow I managed to get a scratch on the rear element of my
FA 50 1.4. It effects the picture quality.

What should I do?

Thanks!
Send it for repair or buy a new one.
06-23-2016, 08:06 PM   #8
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Location: Hunter Valley,NSW, Australia
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Tiny brush and Car windscreen crack filler should work this would require the plastic seal and UV light to cure or clear nail lacquer for a quick fix. this crack should not effect picture quality that much so thats what
i would do

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