Meyer Gorlitz Trioplan 100mm f2.8 - M39

[weihsuan]

Hi all,

I've recently purchased a M39 Trioplan 100mm f2.8 for a moderate sum (slightly lower than a usual M42 trioplan) to my delight.

Lens seemingly uncoated, serial #993***.

I'd like to request some information regarding the lens from the knowledgeable members of the forum, such as the year of manufacture, number of copies made, filter size, etc. Interestingly, in view of the lens being a telephoto lens, it is not RF coupled. How was it used in the past and why was it even made?

Lastly, the hood cant seem to be unscrewed. Any tips on how to get it off? There are some slight engraving on the hood (bummer), so i'll be keen to find a replacement for it.

Some photos of the lens, and a photo using it on the Sony A7ii to demonstrate the "soap bubble" effect.







Thank you all in advance

Cheers
Wei

[calvin83]

The German word 'ohne kupplung' means 'without coupling'.

[luisalegria]

What is the back focus on this?
That should be informative about its purpose.

[weihsuan]

Thanks for replies.

To add, the flange distance for the lens allows for it to be used on Leica/Cosina/etc LTM cameras. Not the old M39 Russian SLR mount. That said, as its without RF coupling, it would be a challenge to accurately focus in view of relatively thin DOF (100mm f2.. Hence, my question on how was it used and intended purpose.

Will appreciate more information on the lens.

Thank you all in advance.

[calvin83]

Not all camera with LTM mount has a rangefinder...

[kypfer]

Is it my imagination, or is that a T2 adaptor or similar on the back of the lens? Could it be that it's a "conventional" SLR-type lens that has been adapted for use on a Leica-screw-mount?