De-yellowing Takumar lens - measured comparison

daliborwalk

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Apr 4, 2018
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Hello, some may be interested.
Check the documented process of de-yellowing the Super Takumar 105mm f2.4
I try to measure the difference before/after.
Go here:

De-yellowing Takumar Lens - fotoradost

De-yellowing Takumar Lens foto, fotografie, krajina, sport, portrét, fotografiky, smutná, Havířov, Ostrava, severní Morava
www.fotoradost.cz
 

Andreas Thaler

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Excellent thanks for posting!
 

loccdor

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Matches my observations. I've deyellowed 3 lenses, including a Takumar. Two with a UV lamp and one by leaving it in sunlight on windowsill. I put aluminum foil as a reflector around them and wait a week each time. They all remain slightly yellow but much less than how they started. Thank you for recording this.
 

flavio81

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Great work!
 

kl122002

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Apr 17, 2022
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Great work .

I would take off the glass to do the de-yellowing process, since the heat would affect the grease inside.

Besides, I would do it will good ventilation. I found the smell of ozone once the lamp has been on for few hours.
 
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