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philslizzy
Joined: 07 Aug 2012
Posts: 4745
Location: Cheshire, England
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 Posted: Fri Sep 14, 2012 10:27 am Post subject: S.O.L lens 6inch f4.5 What type of lens is this? |
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philslizzy wrote:
I recently won an 'enlarger lens' on the 'bay. Assuming it would have a 39mm screw thread I thought it would be a great macro lens and good for slide duplication.
However it has a strange large screw fitting, bigger than an M42 possibly bigger than a M44 (same thread pitch though) There is a flange supplied with it presumably for mounting on some sort of lens board. The lens is clean and has a single, bluish coating on it.
I think it may be a duplicating lens or something. Can anyone shed any light on this item and possibly point me in the way of an adapter?
Photo of the lens and its flange.
A photo of the lens sat on a Helios showing the different sizes. The left hand sides are matched up
Thanks for any help! |
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calvin83
Joined: 12 Apr 2009
Posts: 7581
Location: Hong Kong
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| Posted: Fri Sep 14, 2012 11:45 am Post subject: |
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calvin83 wrote:
I guess this is an enlarger made in UK with thread 1.75 inch threads but I am not sure...
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philslizzy
Joined: 07 Aug 2012
Posts: 4745
Location: Cheshire, England
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| Posted: Sat Sep 15, 2012 12:08 am Post subject: |
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philslizzy wrote:
| calvin83 wrote: |
| I guess this is an enlarger made in UK with thread 1.75 inch threads but I am not sure... |
I think so too - maybe, but what film size will need a 6inch lens - 150mm approx? I assume a coated lens makes it late 50's earliest and an expensive one too. |
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luisalegria
Joined: 07 Mar 2008
Posts: 6602
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Sat Sep 15, 2012 12:55 am Post subject: |
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luisalegria wrote:
Quarter plate or 4x5
Medium format used 75 - 105mm
Most British and American enlarger lenses had non-standard non-metric threads
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I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
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philslizzy
Joined: 07 Aug 2012
Posts: 4745
Location: Cheshire, England
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| Posted: Sat Sep 15, 2012 6:44 pm Post subject: |
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philslizzy wrote:
| luisalegria wrote: |
Quarter plate or 4x5
Medium format used 75 - 105mm
Most British and American enlarger lenses had non-standard non-metric threads |
So it's possibly a quarter plate enlarger lens. I think if it was a camera lens there would be a shutter or provision to fit one.. I Think the ring is to mount it on a lens board. Oh well I guess I'll have to make my own adapter.
Thanks guys for your help |
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luisalegria
Joined: 07 Mar 2008
Posts: 6602
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Sat Sep 15, 2012 7:25 pm Post subject: |
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luisalegria wrote:
Thats right, the flange is for mounting on a lensboard.
That was the normal mounting system for enlargers in those days.
It is most likely an enlarger lens because of the orientation of the aperture markings.
The lens is meant to be pointed down at the work, hence the user would see the aperture scale right side up.
A camera lens - and such lenses without shutters could have been used on cameras with focal plane shutters, there were many British makes - would have the apertures engraved to be right side up to the user viewing the scale from above and behind the lens.
Also, 6"=150mm, which would be about right for a 4x5 format. The typical 4x5 enlarger was either 135mm or 150mm for 4x5
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I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
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danfromm
Joined: 04 Sep 2011
Posts: 595
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| Posted: Sat Sep 15, 2012 8:15 pm Post subject: |
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danfromm wrote:
Have you counted reflections? It smells like a tessar type. If it is, it will have four strong and no weak reflections from the front cell, two strong and one weak from the rear. The weak reflection from the rear cell may be very hard to see. |
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Farside
Joined: 01 Sep 2007
Posts: 6557
Location: Ireland
Expire: 2013-12-27
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| Posted: Sat Sep 15, 2012 9:43 pm Post subject: |
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Farside wrote:
S.O.L - I never did find out what it came from or who made it or what its use was. All I know is a paid a fiver for it, stuck it on the front of my Ihagee 9x12 and used it as a lens in barrel.
It's ok... produces reasonable results as a camera lens. I must use it again.
Really glad to see it's not alone in the world 
Click for 1600pix version
This is the cam it screws on to; an Ihagee Zweiverschluss (two shutters) - not the original thread, but very close, enough for a good fit. I presume the factory front lens in shutter simply screwed in - I just use the rear shutter and some barrel lenses.
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philslizzy
Joined: 07 Aug 2012
Posts: 4745
Location: Cheshire, England
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| Posted: Sun Sep 16, 2012 9:07 am Post subject: |
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philslizzy wrote:
| luisalegria wrote: |
It is most likely an enlarger lens because of the orientation of the aperture markings.
The lens is meant to be pointed down at the work, hence the user would see the aperture scale right side up.
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yeah, I figured that out when I was making an adapter. Should have noticed.
| danfromm wrote: |
| Have you counted reflections? It smells like a tessar type. |
Will look at the reflections and count them and take some test shots later today. Edit: I see only 3
| farside wrote: |
It's ok... produces reasonable results as a camera lens. I must use it again.
Really glad to see it's not alone in the world |
Nice to see it has a brother Farside. I wish I had one of those old field/plate cameras, but they go for ridiculous money on 'bay these days. I had a Speed graphic and an 8x10 Thornton Pickard in the 70's. It would be a fab wide lens on the TP!
Last edited by philslizzy on Sun Sep 16, 2012 2:09 pm; edited 1 time in total |
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philslizzy
Joined: 07 Aug 2012
Posts: 4745
Location: Cheshire, England
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| Posted: Sun Sep 16, 2012 2:09 pm Post subject: |
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philslizzy wrote:
Here are a couple of shots taken today, rainy outside, it wouldnt normally bother me but a tripod and bellows combo take some covering up.
My Setup Nikon d3200, adapter to Prinzflex M42 bellows, a home made adapter M44 to M42 and the 6inch S.O.S. on front
Conker, at f11 my wife collects them and loves watching them open. perhaps a timelapse project for the (not too distant) future!
Still life 'Jug and Apples' and a 100% crop. Exposure details: ISO 400, 1/5th sec @ f4.5. Unprocessed apart from resizing the top photo for the forum
Overall It's a pretty good lens and performs well at wide aperture. Getting better 'til about f11.
Image wise the pics are fairly low in contrast and cool, it would benefit from a warming filter.
But I'm happy. Going to try some portraits soon. I'll have to invest in some walkie talkies to keep in touch with the model. LOL |
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