Here is a piece i'm working on using a G6 with a RJ speed booster (notice the blue dot?) and samyang VDSLR lenses and a Takumar smc 50mm. I plan to get the samyang 35mm asap to replace the Tak because I have intense gold color shift :/ (almost corrected in this wip render)

Overall the RJ has great sharpness but if you use it at f14-f22 you will likely have this blue dot issue. Use ND's when possible to keep the aperture open!

Will there be a BMPCC Version of the Lens Turbo? Would be great to have an alternative for the expensive metabones bmpcc speedbooster...

Will there be a BMPCC Version of the Lens Turbo?

I do not know for now, may be. It is just useful to understand that whole BMPCC sales are much smaller than sales even of single m43 or E mount cameras.

I like mine a lot but I can't seem to get it to work with my Nikon 50mm or 18mm, I think because of a protruding piece of metal on those lenses.

@kellar42. My 24mm Nikon AIS didn't work because of a protrusion too. I filed it down and its working now. If you wish to do it. Do it at your own risk. Just make sure you have the back lens and all other areas around the protrusion covered. I used lens tissue to cover the areas.

Will there be minolta md version?

As far as I know answer is positive for Minolta SR mount.

Sorry the silly question, but RJ stands for what? Is Mitakon better than this rj?

Rj speed booster & G6... look at this swiriling bokeh! Lenses : samyang 85t1.5, 14t3.1 and takumar smc 50 f1.4

So, Rj and Mitakon are similar, the first better in corner but some blue dot issue in certain situations, the second better center but worst at corners.

The last question: both of them can't let you adjust aperture, right? Cause i've a lens without aperture ring, and would like to know if i can control from this adapter or from cameera directly (i hope but i don't think so..)

Sorry Vitaliy, i'm trying to decide. I've with me a Nikon G lens as the Sigma 30mm 1.4 is. A very good lens, but it does not have aperture ring. With RJ nikon G adapter can i control aperture without problems? What about infinity focus? Would like to have this combo with omd for ibis, could be a good idea? Also, on Nikon G adapter can i mount Nikon F (Ai-Ais) lens? And the last thing: is the blue dot issue appearing at fast values (1.4) or darker (about f11, for exemple) of F? For the final price and to order, have i to send you pm? Thanks.

"Showing the benefits of the extra stop of light, the reason I purchased the RJ Lens Turbo focal reducer (getting the lens to be a ~35mm is not important, I have other lenses to cover that length). The Nikon 50mm AIS is 'usable' at f1.4, stopping down to f2 makes a big difference in spherical aberration (and, not shown in this test, coma). The focal reducer, though perhaps degrading the image (acceptably or otherwise) at smaller f-numbers, works to make this lens (as well as any lens that improves immediately from stopping down one stop, including a couple of other lenses that I already own, but this was the most important one for me in deciding to purchase the focal reducer) much more usable at a light transmission of 'f1.4'. Overall, early in my ownership of this affordable 'alternative' to the Metabones Speedbooster, I'm happy that I made the purchase.

I did have to make a slight adjustment to my lens, sanding down a few millimetres of a protruding piece of metal, but it was no big deal.

Shot on a GH2 (Moon T7) adjusting camera placement to keep framing the same, and as stated above, stopping down one stop with the RJ Lens Turbo to keep the exposure the same. Focus (using focus-assist) is on "What Can We Learn From Traditional Societies?" Voigtlander F-Mount to M43 is the first shot, follwed by the RJ Lens Turbo F/G to M43 shot.

When I purchase the Sigma 10-20mm (or Tokina 11-16) I will do a wide angle test (getting these lenses to 7-8mm would be the reason to use them on the focal reducer). But for the price, and if you already own a lens where the benefit of one stop makes a big difference such as the 50mm f1.4 AIS, I would already recommend this reducer."

The reducer arrived in Ottawa, Ontario, Canada, from China (with tracking, including with Canada Post for the last leg) within the 2-3 weeks stated (18 days)

@inukhiphop Why don't you add light to the non booster test to remove all the variables. It doesn't make much sense to compare items if you have any sort of variable.