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Projection lenses

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Fred_S View Drop Down
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Post Options Post Options   Quote Fred_S Quote  Post ReplyReply Direct Link To This Post Topic: Projection lenses
    Posted: 07 November 2020 at 20:09
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.








 



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Fred_S View Drop Down
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Post Options Post Options   Quote Fred_S Quote  Post ReplyReply Direct Link To This Post Posted: 14 November 2020 at 19:38
Another zebra: The USSR Triplet 2.8/75mm



Here's the improvised mounting on the A7R2 with a clamp, helicoid, tube (all m42) and m42-NEX adapter.



And some first test shots






Testing the bubble potential


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Fred_S View Drop Down
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Post Options Post Options   Quote Fred_S Quote  Post ReplyReply Direct Link To This Post Posted: 05 January 2021 at 20:52
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
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dCap View Drop Down
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Post Options Post Options   Quote dCap Quote  Post ReplyReply Direct Link To This Post Posted: 05 January 2021 at 21:04
I really like the photos in today's posts.
Pretty amazing!

Wonder, have you ever bought/found/used a 'security camera' lens?
I was under the impression that a LOT of the 'exciting/new' manual focus f/1.something and f/0.something lenses were re-branded $20 security camera optics with a substantial mark up (is this a complete myth?).
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Phil Wood View Drop Down
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Post Options Post Options   Quote Phil Wood Quote  Post ReplyReply Direct Link To This Post Posted: 06 January 2021 at 13:10
I like the Elmaron results - very nice.
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Fred_S View Drop Down
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Post Options Post Options   Quote Fred_S Quote  Post ReplyReply Direct Link To This Post Posted: 06 January 2021 at 21:17
Thanks both! Yes, it's a nice lens. A bit bulky to use, but I like its bokeh.

@dCap: Interesting question, but no, I don't have experience with 'security camera lenses'
You can find plenty of them, especially when you look for C-mount lenses on the web. I may try one later. The rumour about rebranded security lenses is new to me. Maybe others know more about that?
 



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Purelightglow View Drop Down
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Post Options Post Options   Quote Purelightglow Quote  Post ReplyReply Direct Link To This Post Posted: 30 January 2021 at 22:00
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
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Post Options Post Options   Quote Purelightglow Quote  Post ReplyReply Direct Link To This Post Posted: 30 January 2021 at 22:35
The advantage of a lower contrast lens shown with edit information
Voigtlander Projector lens compared_MG_8742_2 by Warren Bell, on Flickr
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Post Options Post Options   Quote Purelightglow Quote  Post ReplyReply Direct Link To This Post Posted: 30 January 2021 at 22:56
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
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Fred_S View Drop Down
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Post Options Post Options   Quote Fred_S Quote  Post ReplyReply Direct Link To This Post Posted: 31 January 2021 at 11:34
Nice to get some company here and welcome to Dyxum Warren!
Thanks for sharing the comparison shots. I never have the patience to do something like that . There are a few unknown to me lenses too.
The Elmaron shot is very creative ! I like it .
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Miranda F View Drop Down
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Post Options Post Options   Quote Miranda F Quote  Post ReplyReply Direct Link To This Post Posted: 31 January 2021 at 21:56
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.
Miranda F & Sensorex, Sony A7Rii, A58, Nex-6, Dynax 4, 5, 60, 500si/600si/700si/800si, various Sony & Minolta lenses, several Tamrons, lots of MF primes and *far* too many old film cameras ...
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Fred_S View Drop Down
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Post Options Post Options   Quote Fred_S Quote  Post ReplyReply Direct Link To This Post Posted: 09 August 2021 at 20:30
Holiday, at home and poor weather: a good time to get an earlier aquisition going .
It is the Old Delft Delitar f/3 F=10.5cm projection lens, from a Delita slide projector. The projector (ca. 1950) has its own built in transformer for 33, 110 and 220 Volt.


#1 Unboxing



#2 Delitar f/3 f=10.5cm


It was easier than expected to detach he lens. Just unscrewing three tiny screws to remove it from the helicoid contstruction.
I had found only one 'Delitar' picture on the web. That was very swirly. I haven't found the swirl yet, but it's certainly a lens with character and potential.


#3 Mounted



And some test shots, mainly to find out the character

#4



#5



#6



#7



#8



#9





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