"requires Ring"

[Bob F.]

I'm not sure what a "ring" is in this context. The vast majority of enlargers have threaded lens mounts (usually 39mm but there are a few others such as larger threads for some 150mm and longer focal length lenses).

I guess there may be un-threaded mounts that need a retaining ring similar to when mounting lenses on large format camera lens panels but I do not think they are at all common - at least, I've not seen one but that is not necessarily a major indicator...

Given the price of these things these days, I'd go for (and already do own) the f/2.8 50mm El-Nikkor rather than the simpler designed f/4 version.

Have fun.

[MattKing]

I'm not sure what a "ring" is in this context. The vast majority of enlargers have threaded lens mounts (usually 39mm but there are a few others such as larger threads for some 150mm and longer focal length lenses).

I guess there may be un-threaded mounts that need a retaining ring similar to when mounting lenses on large format camera lens panels but I do not think they are at all common - at least, I've not seen one but that is not necessarily a major indicator...

Bob:

In North America, a large percentage (possibly a majority) of the enlargers out there are Beseler enlargers. If I understand things correctly, Beseler enlargers are much less common in Europe.

All the Beseler enlargers I have ever worked with have flat boards with a plain hole, and require retaining rings for the lenses.

IIRC Marko has a Beseler enlarger.

Matt

[David Brown]

In North America, a large percentage (possibly a majority) of the enlargers out there are Beseler enlargers. ...
All the Beseler enlargers I have ever worked with have flat boards with a plain hole, and require retaining rings for the lenses.

And the ones that aren't Beselers are mostly Omegas, which can have either kind of mount.

[Bob F.]

Bob:

In North America, a large percentage (possibly a majority) of the enlargers out there are Beseler enlargers. If I understand things correctly, Beseler enlargers are much less common in Europe.

All the Beseler enlargers I have ever worked with have flat boards with a plain hole, and require retaining rings for the lenses.

IIRC Marko has a Beseler enlarger.

Matt

Thanks - once again, I learn something new on APUG!