0.72x Focal Reducer Speed Booster Adapter for M42 mount lens to Fujifilm X mount camera FX - X-Pro1 T1
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0.72x optical glass lens adapter for using Fujifilm X mount APS-C digital cameras with M42 mount (42mm x 1.0) lenses.
(Optional M39-M42 adapter ring for M39 lens)
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 1 stop, also can use it faster by 1 stop.
Switching camera to "Shoot without lens" mode is essential.
Allows focus infinity.
Blue spot will occur if lens is shot to sunlight or lamp directly.
With front and rear caps.