Viltrox Ef-Efm M2 speed booster 0.71x


powergoo

Senior Member
Dec 13, 2005
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Hi everyone,

Anyone have a hands on with the above spped booster adapter that gives your M series cam with a full frame viewing and a 1 stop aperture advantage.

Sold in amazon and viltrox homepage for USD 156.

Thanks.
 

raphl87

New Member
Oct 21, 2018
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Hi I have it. Work like a charm and I have another extra(cos people were saying the Amazon seller was a fake and so I shopped around for another.

If you are keen to transact I can let go at $250.
 

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powergoo

Senior Member
Dec 13, 2005
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Hi, what body and lenses did u use with. I am still deliberating if i should buy it. Thanks
 

Bamboopictures

Senior Member
Hi I have it. Work like a charm and I have another extra(cos people were saying the Amazon seller was a fake and so I shopped around for another.

If you are keen to transact I can let go at $250.
Can I ask if iyou have tried it with any APS-C (EF-S) mount lenses? Any vignetting?
 

koiboi

New Member
Apr 7, 2011
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Can I ask if iyou have tried it with any APS-C (EF-S) mount lenses? Any vignetting?
According to spec, only FF EF lenses. EF-S, EF-M won't work.
 

powergoo

Senior Member
Dec 13, 2005
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Bought my Viltrox sppedbooster.

Great for STM lenses.like my 40mm pancake. However, not so great on old micro motor lenses.
 

powergoo

Senior Member
Dec 13, 2005
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Anyone tried using adapted FF manual lenses like M42 or nikkors on it?
 

powergoo

Senior Member
Dec 13, 2005
1,238
0
36
Can I ask if iyou have tried it with any APS-C (EF-S) mount lenses? Any vignetting?
It will only mount EF lenses, not EF-s, so cropp 3rd party lenses can be mounted like sigma 18-35mm f1.8
 

powergoo

Senior Member
Dec 13, 2005
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The focusing spped is slightly slower. but fine with me.