Problem IM35

[Rene]

Hello all, on behalf of a friend of mine with a Zeiss inverted:

The image quality is good on the left side of view, but gradually decreases towards the right side. Very noticable with a 25x neofluar on test diatom G. balticum. Less noticable with the 63x oil, hard to see with the 10x achro.
Turning the objective does not make a difference, turning the binocular does not move the problem together with the binocular. Filament (led) nicely in the middle. So I suppose the problem must lay within the frame.

What should I do next??

Thanks,
René

(apologies for my use of english, replies in Deutsch welcome)

[reblaus]

Hallo -
ist dieser Fehler auch auf dem Bild durch die Fotoeinrichtung (vorne, unten) zu sehen oder nur durch das Binokular (mit Fototubus?)?
Gruß
Rolf

[Rene]

Thanks Rolf,
Unfortunately, no camera attached, so only the observation through the binocular tube. Could try a Canon, is there a simple adapter ring from the Zeiss front port to Canon?

Best wishes, René

[Jürgen Boschert]

Hi Rene,

this sounds like a delamination somewhere in the gutts of the IM35 to me. Check the lens of the objective turret. Then try and check with a phase telescope, with which you may possibly be able to locate the problem. Just give us a feedback then.

Regards !

JB