Micro Four Thirds Focal Reducer Shootout

Started Feb 20, 2014 | Discussions thread
OP brian Senior Member • Posts: 1,206
Re: Given your clear vested interest in the results......

dougjgreen1 wrote:

How can we know that you tested equally representative samples of each of these items? Other than the Light Cannon, which is clearly an inferior product, the differences - especially between the Speed Booster and the Lens Turbo, are quite subtle and could easily be explained by sample variations.

How do we know you didn't test a cherry-picked sample of the Speed Booster? It's fairly common practice to use an internally screened sample of one's own product for benchmarking purposes.

Interpret my results however you wish.  However, there was no cherry-picking going on.  In fact, the m4/3 Metabones Speed Booster I have is on the high side of the flange angular runout tolerance of Metabones products.

My test methods aren't exactly complicated.  If you have doubts there is certainly nothing stopping you from repeating my tests and publishing your own results.

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Brian Caldwell

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