Scratch

condor27596 · 06-13-2016, 06:37 AM

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!

**sergysergy** · 06-13-2016, 08:02 AM

maybe you can replace it with one of a M 1.4? hopefully they are the same

condor27596 · 06-13-2016, 09:23 AM

I actually do have that one of the radioactive ones.

**sergysergy** · 06-13-2016, 09:44 AM

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.

condor27596 · 06-13-2016, 09:53 AM

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 (?).

Xmas · 06-17-2016, 04:18 AM

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...

Wheatfield · 06-23-2016, 07:21 PM

Originally posted by condor27596

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.

gmans · 06-23-2016, 08:06 PM

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

06-13-2016, 06:37 AM	#1
condor27596 Veteran Member Join Date: Sep 2012 Location: Raleigh, NC, USA Posts: 870	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!

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06-13-2016, 08:02 AM	#2
sergysergy Site Supporter Join Date: Jan 2011 Photos: Gallery Posts: 5,170	maybe you can replace it with one of a M 1.4? hopefully they are the same

06-13-2016, 09:23 AM	#3
condor27596 Veteran Member Join Date: Sep 2012 Location: Raleigh, NC, USA Posts: 870 Original Poster	I actually do have that one of the radioactive ones.

06-13-2016, 09:44 AM	#4
sergysergy Site Supporter Join Date: Jan 2011 Photos: Gallery Posts: 5,170	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
condor27596 Veteran Member Join Date: Sep 2012 Location: Raleigh, NC, USA Posts: 870 Original Poster	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
Xmas Veteran Member Join Date: Mar 2015 Posts: 617	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
Wheatfield Moderator Join Date: Apr 2008 Location: The wheatfields of Canada Posts: 15,981	Originally posted by condor27596 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
gmans Veteran Member Join Date: Dec 2012 Location: Hunter Valley,NSW, Australia Photos: Gallery \| Albums Posts: 2,466	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