Metabones Speed Booster for Pentax K lenses?

Started Apr 14, 2013 | Discussions thread
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Re: Speedbooster works well.
In reply to Ari Aikomus, Apr 16, 2013

Ari Aikomus wrote:

BobORama wrote:

WHY would you want to use a product that reduces contrast and increases CA, when Instagram is free?

Actually it works surprisingly well:

at least 28-135mm range, it is designed for shorter than 200mm FF lenses.

When shooting video, with its astonishing 2MP stills, most of the optical gack introduced by the Metabones FR is concealed.   For video work, it may be passible.

The example stills from DRP's review show significant CA, some edge softness, some loss of contrast.   And of course any increase in real aperture will come with a decrease in contrast.   Look at the DPR stills.   Its pretty telling.

 BobORama's gear list:BobORama's gear list
Pentax K-5 Sigma 10mm F2.8 EX DC HSM Diagonal Fisheye Pentax smc DA 18-55mm F3.5-5.6 AL WR Samyang 14mm F2.8 IF ED MC Aspherical +8 more
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