Kenko-Tokina has added the mirrors back into mirrorless with the launch of an ultra-compact Reflex 300mm F6.3 for Micro Four Thirds. This fixed-aperture, manual focus lens revives the catadioptric lens design that was especially popular in the 1970s and '80s for producing small high-magnification telephoto lenses. With a 55mm filter diameter and weight less than 300g, this is possibly the smallest lens of this type that's ever been made for stills cameras. The spec is rounded-off with a minimum focus of 0.8m and 0.5x maximum magnification, making the lens potentially interesting for chasing insects and the like, just as long as you can hold it steadily enough.


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