Projection lenses

This is to start thread for all kind of projection lenses.

I'll start with a new find, the Isco Gottingen Kiptagon f1.3/15-30mm.
Picked it up for a few euro's.

It was used on 8mm film projectors (eg. Rollei P8 and Eumig Eupronet).

#1 The lens


It's a small lens with some 32mm mount diameter. I liked the zebra design.
I have put it in a M42 lens cap. I screwed the cap on some m42 tubes and a helicoid to mount it on my A7R2.

The 8mm is a bit of a challenge on modern digital camera's since it has a small field of view.
In the 15mm it is almost unusable, at 30mm it creates a planet view on full frame.

#2


In APS-C mode, and cropped to square it is usable, but with limited options.
It has a tendency to swirl, but the 8mm field of view is just to small to show that in full glory.

#3



#4



#5




#6



#7


It helped to use center meeting. Multi segment method gave an over-exposed centre.

All in all an nice experiment for just a few euro's.

Feel free to add your projection lens experiments and pictures to this thread.

Next in line: The Leitz Wetzlar Elmaron 2.8/150m projection lens.
This lens came from my fathers Leitz Pradovit slide projector.



This one is in a focussing helicoid tube.



The tube has a 54mm thread at the bottom. With an adapter ring I converted that to m42 thread, which enables easy mounting via macro tubes/helidoid to A or E mount.

I have two other versions with different FL's too (2.8/100mm and a 3.6/200mm).
The collection is not complete yet, there are at least Elmaron projection lenses like 2.8/50mm, a 2.8/85mm, a 2.8/120mm and a 3.2/150mm too.

The Elmaron has a good centre sharpness and a nice characterful bokeh, which can bubble too. Here some examples.

#1 Leaf (On Fuji C200 film with lens on Minolta AF7000)



#2 Zeeuws knoopje (with lens on A99)



#3 Swing (with lens on A99ii)



#4 Tulips (with lens on A99ii)


#5 Birdhouse (with lens on A99ii)
Empty - DSC08822.jpg by Fred St, on Flickr





Edited by Fred_S - 05 January 2021 at 21:01

I like the Elmaron results - very nice.

Some of the lenses aren't showing their better quality here although most of these are similar. Various levels of flare, ring and some swirl bokeh

_MG_8745 comparison by Warren Bell, on Flickr

Edited by Purelightglow - 30 January 2021 at 22:30

Leitz Wetzlar Elmaron 150mm 2.8 sunset grass low light so it's heavily edited for contrast and colour. It's got a loose element and was tilted for the painterly out of focus, no motion blur.
DSC00322 by Warren Bell, on Flickr


Edited by Purelightglow - 30 January 2021 at 23:10

I read somewhere that many projection lenses were based on Peztval portrait lenses (a design from the 1850s), so it's interesting to see some images from them. I have a few Rolleis I must try to dig out.