Olympus UK E-System User Group

Olympus UK E-System User Group (https://e-group.uk.net/forum/index.php)
-   Converters, adapters and extension tubes (https://e-group.uk.net/forum/forumdisplay.php?f=39)
-   -   Laowa MSC Magic Shift Converter (https://e-group.uk.net/forum/showthread.php?t=46777)

Harold Gough 12th December 2017 06:21 PM

Laowa MSC Magic Shift Converter
 
This is custom made for Laowa's 12mm f/2.8 Zero-D lens:

http://www.venuslens.net/product/lao...m-f2-8-zero-d/

This 12mm lens is made with the following mounts (via adapters): Canon EF, Nikon AI, Sony A, Pentax K and Sony E.

The Converter has high refractive index elements which opens up the 43mm image circle of a 35mm film lens by x1.4 to 60mm making it suitable for shift function*. It can shift up to 10mm left or right or, by rotating it, up or down or any position around 360 degrees.

http://www.venuslens.net/product/lao...ift-converter/

(Web page out of date, AI version is now available).

This available, so far, only for EOS or Nikon AI (lens which will fit it), according to the mount version of the 12mm purchased. However, the enlarged image circle permits many 35mm legacy lenses in EOS or AI mount to be shifted. I have, so far, tried (no photos yet) Tamron SP 17mm, Pentax K 15mm rectilinear and Nikkor-N Auto 24mm. All look good through the viewfinder.

Harold

Petrochemist 13th December 2017 09:26 AM

Re: Laowa MSC Magic Shift Converter
 
Looks interesting!
A teleconverter with a twist (well slide) :)
Look forward to seeing some pictures...


I hope they do a MFT version.

OM USer 13th December 2017 09:49 AM

Re: Laowa MSC Magic Shift Converter
 
Hmm, a very nice optically corrected 12mm lens against a 17mm shift (12mm + shift TC). Why not just use the 12mm and crop?

Harold Gough 13th December 2017 09:59 AM

Re: Laowa MSC Magic Shift Converter
 
Quote:

Originally Posted by Petrochemist (Post 435023)
Looks interesting!
A teleconverter with a twist (well slide) :)
Look forward to seeing some pictures...


I hope they do a MFT version.

Not a TC. It doesn't affect the FL. More like one of those speed reducers. As it spreads the whole image circle, unlike just the inner part with a TC, it must need one stop more exposure, just as with a x1.4 TC.

They could do a version for m4/3, for their 7.5mm, but I am not optimistic. If they were to look to a market for other makes of m4/3 UWAs, they might do.

Harold

Petrochemist 14th December 2017 04:50 PM

Re: Laowa MSC Magic Shift Converter
 
Quote:

Originally Posted by Harold Gough (Post 435030)
Not a TC. It doesn't affect the FL. More like one of those speed reducers. As it spreads the whole image circle, unlike just the inner part with a TC, it must need one stop more exposure, just as with a x1.4 TC.

Harold

I'd have to disagree with you there. The focal length does change (as it does with focal reducers but in the opposite direction).


It can't create imaging light from nowhere. It spreads the image just as a TC does, the difference being the extra image circle is not blocked by baffles & the mount is designed to move to make use of the larger circle.


If you re-read the second article you linked too you should see:
'converts the Laowa 12mm f/2.8 Zero-D to a 17mm f/4 lens with +/- 10mm Shift capability without any vignetting'
12mm to 17mm looks like a change in focal length much the same as produced by a 1.4x TC & the 1 stop change is entirely consistent with that.

Harold Gough 14th December 2017 05:26 PM

Re: Laowa MSC Magic Shift Converter
 
Quote:

Originally Posted by Petrochemist (Post 435161)
I'd have to disagree with you there. The focal length does change (as it does with focal reducers but in the opposite direction).


It can't create imaging light from nowhere. It spreads the image just as a TC does, the difference being the extra image circle is not blocked by baffles & the mount is designed to move to make use of the larger circle.


If you re-read the second article you linked too you should see:
'converts the Laowa 12mm f/2.8 Zero-D to a 17mm f/4 lens with +/- 10mm Shift capability without any vignetting'
12mm to 17mm looks like a change in focal length much the same as produced by a 1.4x TC & the 1 stop change is entirely consistent with that.


Quite right. Too many other distractions here this week. I haven't even taken any pictures through the converter, after many months of waiting.

Even at 17mm, that is a wider shift lens than I had for film, where I had/have 24mm. Knowing how a 17mm rectilinear is a bit of a beast to use to full advantage, a shift version could be quite interesting.

Harold
Of course, all those lenses are normal FL direct on the camera.


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