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Viltrox Speedbooster - Compatibility with my Lenses

Started Dec 16, 2018 | Discussions thread
sobrien
sobrien Senior Member • Posts: 1,756
Re: Viltrox speed booster lens compatible on m50

alvingo wrote:

Getting a speed booster for my m50

Has anyone tried sigma 35 art f1.4, canon 135 f2.0 and 70-200 f4 is ii

I've got one in the post and the first two lenses you mention will be amongst the first that I test out.

I found the autofocus of the 135L using the regular Canon EF-EF-M adapter was only ok with my M50. If the focus was way off it would struggle to find focus. I had to manually bring it close first and then AF would be fine. Bit of a funny one. I'll post back here anyway as soon as I can confirm how they work.

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 sobrien's gear list:sobrien's gear list
Canon EOS R Canon EOS R5 Canon EF 85mm F1.8 USM Canon EF 135mm F2L USM Canon Extender EF 2x III +16 more
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