Author Topic: Projection lenses  (Read 131980 times)

Akira

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Re: Projection lenses
« Reply #150 on: August 10, 2017, 23:07:00 »
The Visionar images are amazing!  Extremely different from the TV-Heligon 100/1.6 for sure!
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Dr Klaus Schmitt

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Re: Projection lenses
« Reply #151 on: August 11, 2017, 23:04:00 »
The Visionar images are amazing!  Extremely different from the TV-Heligon 100/1.6 for sure!

Cannot compare those, the VISIONAR is the latest and best Carl Zeiss Jena projection lens they ever made, with very high resolution and contrast (avaliable up to a f1.9/200mm). It is quite an elaborated double gauss lens, optimized for larger distances, but suprising well behaved if used for close ups. Also works very well with speedbooster.
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Dr Klaus Schmitt

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Re: Projection lenses
« Reply #152 on: November 15, 2017, 09:20:25 »


S Kiptar 1.5/100 on GH4
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Dr Klaus Schmitt

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Re: Projection lenses
« Reply #153 on: November 18, 2017, 10:49:17 »



(same lens)
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Dr Klaus Schmitt

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Re: Projection lenses
« Reply #154 on: November 18, 2017, 10:56:00 »
At a friend's deco shop...







S Kiptar 1.5/100 on GH4
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Dr Klaus Schmitt

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Re: Projection lenses
« Reply #155 on: November 25, 2017, 10:23:43 »
Visionar 1.6/100mm + Speedbooster on Panasonic GH4











Not the greatest lighting there, but oh well...
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Matthew Currie

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Re: Projection lenses
« Reply #156 on: December 10, 2017, 23:03:11 »
I was rummaging in the barn and remembered that back in about 1951 my dad bought a rather exotic German microfilm reader, which I have ended up with.  It took a reel of 35 mm. microfilm and projected it on either its own fold-out screen or, with a trick 90 degree attachment, on a wall or ceiling. Anyway, it has a Steinheil 60 mm. F4.5 Culminar as its main lens, and it occurred to me to try it out.  I bodged up a mount with a piece of a zoom lens and a piece of Exakta extension tube and a couple of setscrews.  The DOF is terribly shallow, it's hard to hold steady, and it's not ideal for focusing without bright lights, being so dark, but it has a kind of nice look to it.  I probably will put the microfilm reader back together, but thought I ought to throw this one into the general projection lens roundup....

These are with a D7100, unassisted daylight, and even with live view the focus is pretty iffy.  Very little room for error.



Dr Klaus Schmitt

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Re: Projection lenses
« Reply #157 on: December 11, 2017, 00:59:12 »
Looks quite nice to me!
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Dr Klaus Schmitt

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Re: Projection lenses
« Reply #158 on: December 12, 2017, 18:21:58 »
To member SEAPY (as I cannot respond to PM...blocked)

Well Robert,

I guess I know a bit what you are after and I would recommend to start with something rather less expensive and see if this is "yours".

Have a look here https://www.flickr.com/photos/kds315/sets/72157670428350566, this is a russian sharp, but not expensive projection lens f1.8/100mm which covers FF, a double Gauss design, which I find rather pleasing. It has a rather long back focal distance, so a Nikon camera should be no problem to adapt it to. It needs such a lens, a lens adapter ring, a focusing helicoid and a camera adapter ring, all available on ebay for not much $$.

I recommend to use my modular method described here: http://photographyoftheinvisibleworld.blogspot.de/2015/09/how-to-modularily-mount-projection-or.html just with a shorter helicoid.

If this then works for you, you would be able to mount a variety of other lenses to it (as I have done and do), possibly just needs a different lens adapter ring.

What would you think of that?

Cheers + Happy Holidays,

Klaus
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Seapy

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Re: Projection lenses
« Reply #159 on: December 12, 2017, 23:19:21 »
Thank you kindly Klaus,  will follow up your links.

You do indeed have a good idea of what I seek to achieve.

Robert

Robert C. P.
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Dr Klaus Schmitt

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Re: Projection lenses
« Reply #160 on: December 12, 2017, 23:40:55 »
Thank you kindly Klaus,  will follow up your links.

You do indeed have a good idea of what I seek to achieve.

Robert

OK, let me know how you proceed!

Btw. I have a few of such russian lenses here, just in case. Since we both are in the EU...
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Seapy

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Re: Projection lenses
« Reply #161 on: December 13, 2017, 00:54:01 »

Since we both are in the EU...

For now...  We better be quick before somebody pulls up the drawbridge!  ;D

Have sent you an eMail.

All the best seasons greetings to you and yours.

Robert
Robert C. P.
South Cumbria, UK

Jack Dahlgren

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Re: Projection lenses
« Reply #162 on: December 13, 2017, 05:42:40 »
To member SEAPY (as I cannot respond to PM...blocked)

Well Robert,

I guess I know a bit what you are after and I would recommend to start with something rather less expensive and see if this is "yours".

Have a look here https://www.flickr.com/photos/kds315/sets/72157670428350566, this is a russian sharp, but not expensive projection lens f1.8/100mm which covers FF, a double Gauss design, which I find rather pleasing. It has a rather long back focal distance, so a Nikon camera should be no problem to adapt it to. It needs such a lens, a lens adapter ring, a focusing helicoid and a camera adapter ring, all available on ebay for not much $$.

I recommend to use my modular method described here: http://photographyoftheinvisibleworld.blogspot.de/2015/09/how-to-modularily-mount-projection-or.html just with a shorter helicoid.

If this then works for you, you would be able to mount a variety of other lenses to it (as I have done and do), possibly just needs a different lens adapter ring.

What would you think of that?

Cheers + Happy Holidays,

Klaus

How is such a lens at greater distances (3 meters, infinity ...)?

Dr Klaus Schmitt

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Re: Projection lenses
« Reply #163 on: December 13, 2017, 07:26:13 »
How is such a lens at greater distances (3 meters, infinity ...)?

The further the better actually! Remembert, those are projection lenses, designed and computed to project a film onto a further away screen!!
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Dr Klaus Schmitt

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Re: Projection lenses
« Reply #164 on: January 05, 2018, 09:57:28 »














MEOPTA 1.7/109mm projection lens on Panasonic GH4
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