Comparing the Viltrox EF-M1 adapter versus the Viltrox EF-M2 speedbooster for use on GH5 MFT M43 cameras and a Sigma 18-35mm lens. People think you have to get a speedbooster of some sort to use this setup.
TLDR Filmmaker began thinking differently about that lens/adapter combo and now has decided to replace the speedbooster with a non-boosted adapter with the Sigma 18-35mm. He does some basic tests to show why he feels he no longer needs a Viltrox EF-M2 speedbooster but just a regular Viltrox EF-M1 smart adapter in it’s place.
Viltrox EF-M1 adapter Specs:
Viltrox EF-M1 mount adapter is designed to allow Canon EF/EF-S series lens to be used on M4/3 camera.
By adapter mounting it can achieve functions of EXIF signal transmission, AF(autofocus) and aperture adjustment,etc.
Firmware upgrade can be operated via the USB port.
. Support AF function;
. Support Exif Transmitting;
. Support Electronic Aperture Control;
. Support IS Stabilization;
. Support USB Firmware upgrade
. 1/4 Thread Tripod Foot at the Bottom;
. Aluminum Alloy Made, Powerful and Stable;
-Micro M4/3 Cameras
Panasonic GH3 GH4 GH5 GF3 GF6 GF7 G6 G7 GM1 GM5 GX1 GX7 and More
Olympus E-P5/E-PM2/E-PL5/E-PL6/E-PL7/OM-D E-M1/OM-D E-M5/OM-D E-M5 Mark II/OM-D E-M10 And More
Viltrox EF-M2 speedbooster info:
The Compatibility: Allow for Canon EF mount series lens to be used on Micro Four Thirds cameras. Focus length multiplier: 0.71x.
Support AF Function: Viltrox EF-M2 lens adapter comes with the gold-plating contact, which can help to connect your Canon EF mount series lens to Micro Four Thirds Cameras, auto focusing perfectly.
Support Aperture Control: Designed with internal aperture motor, you can adjust the aperture from camera end directly to control the lens’ actual aperture.
Material & Design: Made of aluminum alloy; convenient for installation; powerful and stable;Gold-plating contact, excellent transmitting effect.
USB Firmware Upgrade: Equipped with USB interface, can realize software upgrade. Can perfect new functions of the lens mount adapter and fix bugs according to follow-up upgrades.