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ForenSeil
Joined: 15 Apr 2011 Posts: 2726 Location: Kiel, Germany.
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Posted: Thu Dec 01, 2011 11:20 pm Post subject: Helios rear elements as (fun)lenses - The element of suprise |
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ForenSeil wrote:
When I was playing around with lens parts I recognized that the rear elements of Helios/Biotars are able to project.
Here's a rear element (I hope I remember correctly) of a Helios 44M 58mm 1:2
I clamped it to a leftover of an Industar 61 (Leica M39 mount) whose helicoid was used for focusing. I didn't measure the focal distance but I guess it's possible to reach infinty on M42 etc. if you find a way to adapt it which allows focusing
Not very beautyful but it works very well.
First tests:
Very soft focus
@Infinity
Raindrops on the window
(defocused, it's not easy to focus with such a soft lens )
(also defocused, over infinty, but not by accident)
Any experience with that? I would love to see this lens used on some flowers with raindrops (and a hood) but the weather my day's shedule are not friends of this projekt
PS: Contrast could be much better. My copy is hazed a little. _________________ I'm not a collector, I'm a tester
My camera: Sony A7+Zeiss Sonnar 55/1.8
Current favourite lenses (I have many more):
A few macro-Tominons, Samyang 12/2.8, Noritsu 50.7/9.5, Rodagon 105/5.6 on bellows, Samyang 135/2, Nikon ED 180/2.8, Leitz Elmar-R 250/4, Celestron C8 2000mm F10
Most wanted: Samyang 24/1.4, Samyang 35/1.4, Nikon 200/2 ED
My Blog: http://picturechemistry.own-blog.com/
(German language)
Last edited by ForenSeil on Fri Dec 02, 2011 5:20 pm; edited 8 times in total |
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iangreenhalgh1
Joined: 18 Mar 2011 Posts: 15679
Expire: 2014-01-07
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Posted: Fri Dec 02, 2011 12:57 am Post subject: |
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iangreenhalgh1 wrote:
What you have there is the rear 3 elements.
I took the rear group out of a Helios-44 and use the lens with just the front group, which made it a triplet with an effective focal length of 116mm. You should try that, works really well. _________________ I don't care who designed it, who made it or what country it comes from - I just enjoy using it! |
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ForenSeil
Joined: 15 Apr 2011 Posts: 2726 Location: Kiel, Germany.
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Posted: Fri Dec 02, 2011 1:10 am Post subject: |
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ForenSeil wrote:
iangreenhalgh1 wrote: |
What you have there is the rear 3 elements.
I took the rear group out of a Helios-44 and use the lens with just the front group, which made it a triplet with an effective focal length of 116mm. You should try that, works really well. |
I already tried that but I prefer the focal length of the rear element which is somewhere around 50mm I guess _________________ I'm not a collector, I'm a tester
My camera: Sony A7+Zeiss Sonnar 55/1.8
Current favourite lenses (I have many more):
A few macro-Tominons, Samyang 12/2.8, Noritsu 50.7/9.5, Rodagon 105/5.6 on bellows, Samyang 135/2, Nikon ED 180/2.8, Leitz Elmar-R 250/4, Celestron C8 2000mm F10
Most wanted: Samyang 24/1.4, Samyang 35/1.4, Nikon 200/2 ED
My Blog: http://picturechemistry.own-blog.com/
(German language) |
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gmonkman1
Joined: 08 Jun 2011 Posts: 45 Location: se of Winnipeg Manitoba
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Posted: Fri Dec 02, 2011 1:22 am Post subject: |
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gmonkman1 wrote:
nice.....you could call this " the element of surprise ."....lol |
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ForenSeil
Joined: 15 Apr 2011 Posts: 2726 Location: Kiel, Germany.
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Posted: Fri Dec 02, 2011 11:35 am Post subject: |
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ForenSeil wrote:
gmonkman1 wrote: |
nice.....you could call this " the element of surprise ."....lol |
Aaaand it's done _________________ I'm not a collector, I'm a tester
My camera: Sony A7+Zeiss Sonnar 55/1.8
Current favourite lenses (I have many more):
A few macro-Tominons, Samyang 12/2.8, Noritsu 50.7/9.5, Rodagon 105/5.6 on bellows, Samyang 135/2, Nikon ED 180/2.8, Leitz Elmar-R 250/4, Celestron C8 2000mm F10
Most wanted: Samyang 24/1.4, Samyang 35/1.4, Nikon 200/2 ED
My Blog: http://picturechemistry.own-blog.com/
(German language) |
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martinsmith99
Joined: 31 Aug 2008 Posts: 6950 Location: S Glos, UK
Expire: 2013-11-18
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Posted: Fri Dec 02, 2011 12:26 pm Post subject: |
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martinsmith99 wrote:
gmonkman1 wrote: |
nice.....you could call this " the element of surprise ."....lol |
*shudder* _________________ Casual attendance these days |
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Lightshow
Joined: 04 Nov 2011 Posts: 3666 Location: Calgary
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Posted: Fri Dec 02, 2011 12:51 pm Post subject: |
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Lightshow wrote:
It should give interesting results for portraits. |
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ForenSeil
Joined: 15 Apr 2011 Posts: 2726 Location: Kiel, Germany.
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Posted: Fri Dec 02, 2011 3:00 pm Post subject: |
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ForenSeil wrote:
Lightshow wrote: |
It should give interesting results for portraits. |
It might be also very interesting for filming and to to get a special feeling... for example to get a feeling like beeing drunken, very tired, on drugs, etc. _________________ I'm not a collector, I'm a tester
My camera: Sony A7+Zeiss Sonnar 55/1.8
Current favourite lenses (I have many more):
A few macro-Tominons, Samyang 12/2.8, Noritsu 50.7/9.5, Rodagon 105/5.6 on bellows, Samyang 135/2, Nikon ED 180/2.8, Leitz Elmar-R 250/4, Celestron C8 2000mm F10
Most wanted: Samyang 24/1.4, Samyang 35/1.4, Nikon 200/2 ED
My Blog: http://picturechemistry.own-blog.com/
(German language) |
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DSG
Joined: 04 Mar 2007 Posts: 544 Location: London, UK.
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Posted: Mon Dec 05, 2011 12:59 am Post subject: |
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DSG wrote:
ForenSeil wrote: |
Lightshow wrote: |
It should give interesting results for portraits. |
It might be also very interesting for filming and to to get a special feeling... for example to get a feeling like beeing drunken, very tired, on drugs, etc. |
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leilacandy
Joined: 29 Aug 2011 Posts: 3 Location: Italy
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Posted: Tue Dec 06, 2011 6:15 pm Post subject: |
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leilacandy wrote:
Wow! |
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ForenSeil
Joined: 15 Apr 2011 Posts: 2726 Location: Kiel, Germany.
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Posted: Tue Dec 06, 2011 8:11 pm Post subject: |
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ForenSeil wrote:
I've just tried the Helios 40/Cyclop 85mm F1.5 rear element... similar effect, sharper and more contrasty in center but with a longer focal length _________________ I'm not a collector, I'm a tester
My camera: Sony A7+Zeiss Sonnar 55/1.8
Current favourite lenses (I have many more):
A few macro-Tominons, Samyang 12/2.8, Noritsu 50.7/9.5, Rodagon 105/5.6 on bellows, Samyang 135/2, Nikon ED 180/2.8, Leitz Elmar-R 250/4, Celestron C8 2000mm F10
Most wanted: Samyang 24/1.4, Samyang 35/1.4, Nikon 200/2 ED
My Blog: http://picturechemistry.own-blog.com/
(German language) |
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vilva
Joined: 04 Mar 2007 Posts: 785 Location: Porvoo/Borgå, Finland
Expire: 2015-05-27
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Posted: Sat Dec 10, 2011 1:28 pm Post subject: |
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vilva wrote:
This rear element (or actually group) can be used as a pretty good soft-focus lens with a hard to beat bokeh, and mounting it backwards provides a very compact design but without an aperture mechanism. I glued the original rear end of the group onto an M42 macro reversal ring so the group could be mounted totally inside an M42 17-32 mm focusing helicoid. I had previously removed the thread section from the other end of the reversal ring so the lens assembly adds only less than 3 mm to the thickness of the helicoid, which means the total thickness is less than 20 mm, i.e., roughly that of a CZ 45/2.8 Tessar*. The focusing range is from about 40 cm to almost infinity, which is quite OK as I see no need for infinity focus when using a soft-focus lens.
Here is a slightly cropped test shot:
and an intentionally out of focus shot through a glass door showing the bokeh behavior when there are no very bright highlights:
Veijo _________________ Mainly Schneider-Kreuznach Radionar (1938), VPK Meniscus Achromat (1915), TTH Cooke Anastigmat (1917), TTH Cooke Aviar (1937), Goerz Dopp-Anastigmat III Dagor (1912), Voigländer Heliar (1928) or Aldis Uno Series III (1903 design) mounted on EOS 5D or EOS 350D |
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martinsmith99
Joined: 31 Aug 2008 Posts: 6950 Location: S Glos, UK
Expire: 2013-11-18
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Posted: Sun Dec 11, 2011 12:34 pm Post subject: |
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martinsmith99 wrote:
That's a nice result. _________________ Casual attendance these days |
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