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Canon EF-EOS M Compatibility with Tamron and Sigma Lenses

Started Oct 1, 2020 | Questions thread
nnowak Veteran Member • Posts: 9,075
Re: Canon EF-EOS M Compatibility with Tamron and Sigma Lenses

TheDigitalDonbavand wrote:

I highly recommend the Viltrox Focal Reducer to get the most of those lenses, you gain one stop of light and wider angles. Just make sure to get a good copy.
This is a MUST have accessory when you own FF lenses.

Wouldn't it be better just to get a FF camera eg RP or R?

Absolutely.  Any lens on a speedbooster will always be worse optically than the bare lens on full frame.  With some lenses, the combination is only marginally worse.  With other combinations, the optical quality is atrocious.

Speedboosters really only made sense years ago when crop lens catalogs were extremely limited and full frame mirrorless did not yet exist.

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Graham

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