Home

Please support mflenses.com if you need any graphic related work order it from us, click on above banner to order!
SearchSearch MemberlistMemberlist RegisterRegister ProfileProfile Log in to check your private messagesLog in to check your private messages Log inLog in

'Radio=Active' Olympus Zuiko MC 35mm f2
Post new topic   Reply to topic
Home   Manual Focus Lenses
View previous topic :: View next topic  


PostPosted: Tue Aug 21, 2018 2:58 pm    Post subject: 'Radio=Active' Olympus Zuiko MC 35mm f2 Reply with quote
Trying out the 'loaned' OLYMPUS OM-4Ti and lenses I saw the Zuiko MC 35mm f2 all 'Yellowed' -- I found out it is 'Radio-Active' with Thorium element like my Asahi Pentax SMC 50mm f1.4 Takumar. I found the 'Yellowing' acted like a Filter !
FILM was 01/1991 Dated AgfaPan 25 found in my fridge and experimenting with it .
Here are a couple taken at Shoeburyness, Essex, England at f5.6 -- not used it at f2 yet.




PostPosted: Tue Aug 21, 2018 3:06 pm    Post subject: Reply with quote
Like 1 Like 1 Like 1


PostPosted: Tue Aug 21, 2018 8:04 pm    Post subject: Reply with quote
I have the same lens/ However, there isn't any "yellowish" tint in my lens. It has cristally clear colors. For example - how it works upon Samsung NX30:

https://scontent-waw1-1.xx.fbcdn.net/v/t1.0-9/35701591_1767072610046735_6096663852848513024_o.jpg?_nc_cat=0&oh=b66785cece345a1318127f4662ef765f&oe=5BEF4785


PostPosted: Fri Aug 24, 2018 5:58 pm    Post subject: Re: 'Radio=Active' Olympus Zuiko MC 35mm f2 Reply with quote
pentaxpete wrote:
Zuiko MC 35mm f2 all 'Yellowed' -- I found out it is 'Radio-Active' with Thorium element like my Asahi Pentax SMC 50mm f1.4 Takumar.
Did you measure radioactivity of the lens? I couldn't find any relevant info about the lens.


PostPosted: Tue Oct 04, 2022 11:44 pm    Post subject: Re: 'Radio=Active' Olympus Zuiko MC 35mm f2 Reply with quote
pentaxpete wrote:
Trying out the 'loaned' OLYMPUS OM-4Ti and lenses I saw the Zuiko MC 35mm f2 all 'Yellowed' -- I found out it is 'Radio-Active' with Thorium element like my Asahi Pentax SMC 50mm f1.4 Takumar.

You can clear the yellow up with UV exposure — perhaps several days worth.

This will do the job.

The radioactive element will only be in "silver-nose" versions of that lens. Later "black-nose" versions are not radioactive.


PostPosted: Wed Oct 05, 2022 10:49 am    Post subject: Reply with quote
Agfa Pan 25 was one of my favorite films.
Very easy to get sharp and clear prints from it.
Using a grain magnifier under it took a little longer, but well worth it.
Some nice imagery there!

Like 1 Like 1

-D.S.
Post new topic   Reply to topic
Home   Manual Focus Lenses
Page 1 of 1