I've bought the nikon to 4/3 speedbooster and more on connection the gh2 than I've with any cheap adapter. Anyone else bought got the same?

@brianc1959 that's damn impressive!

I am pretty sure that @brianc1959 is Brian Caldwell who developed the focal reducer in the MB Speedbooster. Thanks for posting more good results about edge sharpness on the MB SB!

I use the SB with my collection of Contax lenses, which are some of the finest manual glass ever made, and they shine on the SpeedBooster too. It saved me from buying the single lens I couldn't afford, the 21mm by using the wonderful 28mm instead.

The makers of these sorts of adapters claim that their condensing nature actually increases sharpness. For my usage, sharp lenses produce sharp results with the Lens Turbo, although even sharp lenses do see some softness towards the far edges. Softer lenses (like the Tamron 14mm in the edges, frankly) produce softer results. Lacking a glassless adapter to compare, I uploaded a full-resolution un-sharpened image taken with my Super-Multi-Coated Takumar 100mm f/4 macro lens, which is a consistently sharp lens.

Likewise, lenses which vignette without the adapter also vignette with the adapter.

Via: http://www.pentaxforums.com/news/pentax-lens-turbo-for-sony-nex-cameras.html

I wonder if that's the lens or the SB

It is out of focus stuff. And pretty normal thing with lens like Pentax FA* 85mm f/1.4 .

@dtr

Correct :-) My bad :-) But it is almost same shit and flowers are pretty, so I'll let it reside here also.

"Correct :-) My bad :-) But it is almost same shit and flowers are pretty, so I'll let it reside here also."

The Metabones Speed Booster for micro four thirds is specially designed for that format, and has particularly good center-corner sharpness.

@dtr yep. They send through FedEx (which I just hate). You'll likely have to pay import taxes and VAT (according to your country's laws)

Correct me if I am wrong: it is not possible to have an adapter WITHOUT lens (lens=garbage) and WITH infinity focus to attach m42 lenses to Nikons, since Nikon flange distance is greater than m42 flange distance (the m42 lens should go IN the Nikon body). The flange distance difference is afaik 1 mm. BUT, wouldn't it be possible to create a special lensless adapter for m42 lenses to attach to the Nikon Speedbooster, since there is no such "body intrusion" problem? That would be an ordinary lensless m42 to Nikon adapter machined to make the lens go 1 mm closer to the sensor. Would it work?