De-yellowing Takumar lens - measured comparison

[daliborwalk]

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]

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

Excellent thanks for posting!

 

[loccdor]

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.

 

[pdccamerqs]

Excellent post and very thorough experiment - Thank you!

 

[Pieter12]

A yellow tint might be an advantage for black and white photography...

 

[Andreas Thaler]

A yellow tint might be an advantage for black and white photography...

That would be a compelling argument in the event of a sale:

A special lens for black and white photography that produces increasingly dramatic image results over time ...

 

[moggi1964]

I haven't looked at my 50mm Takumar in a while. She's safe in her special box mind you.
Boy is it dusty up there! EEK!

 

[flavio81]

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

Great work!

 

[kl122002]

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.

 

[forest bagger]

I did that almost 3 years ago: https://www.foto-design.org/htmls/uv-geraet.htm

The result was: https://www.foto-design.org/htmls/pancolare-vergleich.htm