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dan_
Joined: 05 Dec 2012
Posts: 1058
Location: Romania
Expire: 2016-12-19
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 Posted: Thu Oct 23, 2014 5:42 pm Post subject: Visionar 100 mm. f/1.6 + Speed Booster - first shots |
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dan_ wrote:
I've just finished the work at my Visionar 100mm f/1.6 projection lens and now it has a diaphragm, a focusing helicoid and a Leica R mount to allow me to mount it on my Leica R - Sony NEX Speed Booster. All the steps of this adaptation can be read in detail here:
http://forum.mflenses.com/forcing-the-visionar-100mm-f-1-6-to-accept-a-diaphragm-t68374.html
The lens is now looking like this:
Used in conjunction with the Speed Booster my Visionar becomes a 70 mm. f/1.15 lens, very convenient for close up and portrait shots. And, taking advantage of a late autumn sunny day, that's exactly what I tested it for.
And an 100% detail:
And some portraits :
And an 100% detail:
And a B&W conversion portrait:
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cyrano
Joined: 15 Feb 2013
Posts: 857
Location: UK
Expire: 2016-12-30
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| Posted: Thu Oct 23, 2014 6:30 pm Post subject: |
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cyrano wrote:
What a fantastic effort Dan, I tip my hat to you. 
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A whole bunch of stuff. |
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Olivier
Joined: 18 Feb 2009
Posts: 5083
Location: France
Expire: 2015-08-06
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| Posted: Thu Oct 23, 2014 9:16 pm Post subject: |
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Olivier wrote:
That's really impressive.
It was worth the effort !
Congratulations for the hard precise work and these great photographs.
I believe you were very satisfied, weren't you ? 
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Lloydy
Joined: 02 Sep 2009
Posts: 7795
Location: Ironbridge. UK.
Expire: 2022-01-01
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| Posted: Thu Oct 23, 2014 10:02 pm Post subject: |
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Lloydy wrote:
Yes, impressive work Dan. Not only on the skilled conversion, but the quality of the images.
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IAZA
Joined: 16 Apr 2010
Posts: 2587
Location: Indonesia
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| Posted: Fri Oct 24, 2014 12:41 am Post subject: |
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IAZA wrote:
beautiful finish Dan.. congratz..
Any hint of F stop on pictures, to see different with and without aperture?
Nice results BTW
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~Suat~ |
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BurstMox
Joined: 04 Dec 2011
Posts: 2018
Location: France
Expire: 2016-08-02
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| Posted: Fri Oct 24, 2014 1:11 am Post subject: |
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BurstMox wrote:
Great job! And nice results
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sovietlenses.fr
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RSalles
Joined: 12 Aug 2012
Posts: 1372
Location: Brazil - RS / South
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| Posted: Fri Oct 24, 2014 1:43 am Post subject: |
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RSalles wrote:
Terrific result! This is a superb lens, very well balanced between sharpness, color sat., color temp., macro & micro contrast, bokeh smoothness, and so on.
The way you've framed the images is also very nice, great work, worth the work done,
Best,
Renato |
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exaklaus
Joined: 11 Aug 2009
Posts: 1633
Location: Niederrhein, Germany
Expire: 2011-12-02
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| Posted: Fri Oct 24, 2014 6:03 am Post subject: |
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exaklaus wrote:
What a nice job! Precisly done. And your great photos show, it was well worth the efforts!
Klaus
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uddhava
Joined: 22 Aug 2012
Posts: 3072
Location: Hungary
Expire: 2021-06-21
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| Posted: Fri Oct 24, 2014 7:13 am Post subject: |
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uddhava wrote:
Really excellent job and photo results! Good work. |
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dan_
Joined: 05 Dec 2012
Posts: 1058
Location: Romania
Expire: 2016-12-19
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| Posted: Fri Oct 24, 2014 5:32 pm Post subject: |
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dan_ wrote:
Thank you very much gentlemen! I appreciate your kind words very much.
So far I like this lens a lot. But, as always happens, it has its drawbacks.
I wouldn't use it for all-sharp landscapes because its region of sharp focus is rather spherical (only noticeable in real life when the lens is focused at infinity), and its weight, while still comfortable at limit, is quite significant.
Olivier
Yes Olivier, I'm quite satisfied with the final conversion and I think it was worth the effort. Thanks a lot for your appreciation.
IAZA
Thank you, Suat. I'll make a comparative test with the lens closed to all diaphragm f-stops in the next day.
RSalles
Yes Renato, I think the lens has a very nice balance, too. Thank you. |
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SVP
Joined: 15 Jan 2009
Posts: 665
Location: Greece
Expire: 2017-12-17
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| Posted: Sat Oct 25, 2014 8:07 pm Post subject: |
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SVP wrote:
Fantastic results, congrats! |
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dan_
Joined: 05 Dec 2012
Posts: 1058
Location: Romania
Expire: 2016-12-19
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| Posted: Sun Oct 26, 2014 11:21 pm Post subject: |
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dan_ wrote:
Thank you, SVP. |
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Kamosor
Joined: 15 Jan 2014
Posts: 16
Location: Poland
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| Posted: Tue Oct 28, 2014 1:04 pm Post subject: |
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Kamosor wrote:
Dan, you did it GREAT conversion and beautiful photos. |
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rebelstar
Joined: 05 Nov 2014
Posts: 194
Location: Minsk, Belarus
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| Posted: Wed Nov 05, 2014 3:14 pm Post subject: |
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rebelstar wrote:
Great work! How did you calculate "boosted" 1.15 aperture of initial f1.6? I have booster too for my nex-5n and wide amount of different lenses. For example what aperture will be for 50mm 1.7 and 100mm 1.8 with booster? |
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dan_
Joined: 05 Dec 2012
Posts: 1058
Location: Romania
Expire: 2016-12-19
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| Posted: Thu Nov 06, 2014 9:50 am Post subject: |
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dan_ wrote:
Thank you Kamosor and rebelstar.
| rebelstar wrote: |
| Great work! How did you calculate "boosted" 1.15 aperture of initial f1.6? I have booster too for my nex-5n and wide amount of different lenses. For example what aperture will be for 50mm 1.7 and 100mm 1.8 with booster? |
The boosted aperture should be an one f/stop larger aperture than the initial one. One stop in ascending order is f/stop x 1.4 (1, 1x1.4=1.4, 1.4x1.4=~2, 2x1.4=2.8, ....) and in descending order is f/stop x 0.7 ( 2.8x0.7=~2, 2x0.7=1.4, 1.4x0.7=~1, ...).
An one stop larger aperture from 1.6 should be 1.6x0.7=1.12, approximated by me to 1.15 because the 0.7 normally used ratio is, in fact, a little greater (=sqt2). The second decimal has no effect on the final image and therefor I always approximate it to the closest 0.05.
The boosted 1.7 should be 1.7x0.7=1.19 (~1.2) and the boosted 1.8 should be 1.8x0.7=1.26 (~1.25). |
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rebelstar
Joined: 05 Nov 2014
Posts: 194
Location: Minsk, Belarus
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| Posted: Thu Nov 06, 2014 10:01 am Post subject: |
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rebelstar wrote:
Thank you for this formula! So basically each time I need use x0.7? So, Canon dream lens 50 0.95 will be ~f0.6  |
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dan_
Joined: 05 Dec 2012
Posts: 1058
Location: Romania
Expire: 2016-12-19
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| Posted: Thu Nov 06, 2014 10:19 am Post subject: |
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dan_ wrote:
Yes, that is the formula.
If you read carefully the Speed Booster White Book on the Metabones site they say that there is a limit for the increase in luminosity with very luminous lenses. Probably the 50 f/0.95 Canon lens exceeds that limit. |
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kuuan
Joined: 14 Jan 2008
Posts: 4569
Location: right now: Austria
Expire: 2014-12-26
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| Posted: Thu Nov 06, 2014 2:20 pm Post subject: |
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kuuan wrote:
wow, congrats Dan, so very well done, and the results are amazing, specially the portrait and the crop of it!
...........
resp. the Canon 0.95, for it being a rangefinder lens there no existing lens turbo, doubt it, but possibly there is enough space to X or E mount for a diy project (?)
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dan_
Joined: 05 Dec 2012
Posts: 1058
Location: Romania
Expire: 2016-12-19
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| Posted: Fri Nov 07, 2014 8:25 am Post subject: |
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dan_ wrote:
Thanks Kuuan! |
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Langstrum
Joined: 16 Feb 2014
Posts: 351
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| Posted: Fri Nov 07, 2014 3:44 pm Post subject: |
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Langstrum wrote:
I'd like to see more fantastic photos from this lens, it's amazing 
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frenched
Joined: 16 Feb 2013
Posts: 395
Location: MD USA
Expire: 2014-06-17
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| Posted: Sat Nov 08, 2014 12:01 am Post subject: |
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frenched wrote:
As others have said, well worth the effort. Magnificent results! |
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moltogordo
Joined: 16 Mar 2014
Posts: 46
Location: Prince George, British Columbia
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| Posted: Sun Nov 09, 2014 11:04 am Post subject: |
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moltogordo wrote:
Ingenuity is alive and well in Romania! Excellent images, too! Bravo!
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dan_
Joined: 05 Dec 2012
Posts: 1058
Location: Romania
Expire: 2016-12-19
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| Posted: Sun Nov 09, 2014 11:34 am Post subject: |
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dan_ wrote:
Thanks Langstrum, frenched and moltogordo. |
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vroger
Joined: 23 Jul 2014
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Location: MN
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| Posted: Sun Nov 08, 2015 3:56 pm Post subject: |
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vroger wrote:
Great results!!!!!!!!!!!!
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For sale: Canon EOS-M and MF Adapters. |
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hoanpham
Joined: 31 Jan 2011
Posts: 2575
Expire: 2015-01-18
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| Posted: Sun Nov 08, 2015 3:59 pm Post subject: |
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hoanpham wrote:
I haven't seen until now. Very nice. More please. |
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