brian

No. The Speed Booster is designed to accept a maximum aperture of f/1.2 (actually f/(2^(1/3)) = f/1.2599) from the attached lens and then output a maximum aperture of f/0.90 to the camera.

The...

Pixel vignetting, which I call sensor-induced apodization, occurs everywhere in the image, including the center of the field. Its all about marginal ray angle and the reduced sensor sensitivity as...

The Speed Booster gains a full stop of lens speed, e.g., f/1.4 becomes f/1.0.  The lens elements have highly efficient AR coatings, and no filtering is going on.

FWIW, the Speed Booster plus a pancake version of the Nikon 50mm f/1.8 AIS is the smallest and lightest 35mm f/1.2 you can get.  For the combination the weight is 414 grams and the length from the...

Very interesting work!  Did you have to remove the rear baffle of your 10-22 EFS lens in order to  mount the Speed Booster, or did you only do that to reduce the vignetting?

Salvador:
Any similarity between the Nikon E system and the Speed Booster is superficial at best.

The wikipedia article leaves out several critical details that ultimately doomed the Nikon E...

You're welcome!  I'm a big fan of M43, and am personally looking forward to using this version of the Speed Booster.I'm sure there will be plenty of confusion regarding the M43 version.  Below are...

Combined with the SB your 16/2.8 will become an 11.4/2.0, which still might not be wide enough for you.  Image quality should be fine, however. If you want to cover 180 degrees corner-to-corner...

The  M43 version of the Speed Booster will have the same 0.71x reduction factor as the NEX version, so it will boost the aperture by one full stop.  I wanted (and tried) to do a version with...

According to metadata for the wide-open test chart image (as reported in Photoshop) the focal length is 35mm and the aperture is f/1.0. So I assume that at least for this comparison we are looking...

Hi Joe:
Was this the review (17mm TS-E + SB): http://verybiglobo.blogspot.com/2013/01/metabones-speed-booster-review-nex-7_31.html

Its a little surprising that shift-lenses can function with the...

Even with SLR lenses the Speed Booster optics are very cramped.  Unfortunately, a compact general-purpose reducer suitable for Leica M and Contax G lenses would inevitably have too much aberration...

Actually the best objectives will tend to reveal any residual aberrations in the Speed Booster, especially when the image is magnified to pixel-peeing proportions.  Lenses that have significant...

Forgive me - I used to do alot of large format shooting with a view camera, so I tend to think in terms of "rise" and "fall" instead of "shift".  So, the 12mm of rise that I indicated in my quick...

Hi Erik:You have to bear in mind that the 85/1.2 + SB is a 60mm f/0.90 lens.  Even slower lenses, such as the Leica f/1 Noctilux, have a similar bokeh pattern:...

Its true that a reducer will "reveal" the corners of a FF lens when used on a smaller format. Achieving good corner MTF will require using a master lens with good corner performance to begin...

Designing focal reducers to fit 35mm SLR lenses onto mirrorless Sony NEX and m4/3 cameras is most definitely feasible. The design isn't easy because there is very little room to work with, but if...