Objektive mit Iris Zeiss stecken ?

[kalleboy]

Carl Zeiss Jena Apochromat HI 100x/1.32, 160/ 0.17
Objektive mit Iris Zeiss
- The Iris seems stuck/jammed(stecken). It does not move how can I move it ?
- How does it function ?
- Operations manual ?

[timizas]

Hallo.
versucht?

[JoachimHLD]

Hallo,
don't use WD40, it's creeping on the lenses too! so your lens would be trash.
Try to waem it slow up to 40°C or use some petroleum ether.
Good luck
Joachim

[timizas]

Nicht auf der Innenseite!
Sehr wenig.
Unter dem Ring an der Objektive.

[Klaus Herrmann]

Hello Niklas,

I would also recomend to try first to warm it up. WD 40 is very powerfull, but dangerous to optics

Edit: Hello Niklas,

a friend just called me and told me to ask you: this ring turns in two directions. Now it stands at one end. Can you please try to turn it in the other direction?
This ring moves a smal diapragm (Iris) inside the objetive so you can make darkfield-contrast in combination with a darkfieldcondensor.

[kalleboy]

Does it have a complex james bond style Iris inside or what construction ?
- At what temperature *C does the lamination start to burn off ?
- Hair dryer used. Fingers crossed.

[Klaus Herrmann]

Does it have a complex james bond style Iris inside or what construction ?

Exactly! and this iris goes in two directions open and close. Now it stands at "close" you must go in the other direction!

Temperature of a hairdryer will not destroy the objective! But it needs some time to soften the lubrication.