0. 72x focal reducer speed booster adapter for m42 mount lens to canon eos m ef-m mount camera – m5 ii m50 m100

0.72x optical glass lens adapter for using canon eos m ef-m mount aps-c digital cameras with m42mount (42mm x 1.0) lenses.
(optional m39m42adapter ring for m39lens)

reduces focal length to 0.72, adjust the image size to near 1:1, so that the focal length of the image is close to actual focal length of the lens, e.g. 50mm x 1.5 x 0.72 = 54mm.

helps to increase the maximum aperture to 1stop, also can use it faster by 1stop.

switching camera to “release shutter without lens” in custom menu c.fn7 is essential.
allows focus infinity.
blue spot will occur if lens is shot to sunlight or lamp directly.
with front and rear caps.