APS-C / 1.52x
Focals
fixed focal
50 mm.
76 mm.
1.00x
No
No / n.a.
Aperture
f/1
9
Yes
No
No
Focus
Yes
Yes
Indirect
No
DC motor for AF
70 cm.
0.08x (35mm. equiv)
Build
No
12/9
1 aspherical, 2 extra low dispersion
77 mm.
Yes
Yes
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8.4/10
It is a unique option for users of X-mount cameras, offering the widest aperture you can get while still featuring autofocus. It's far from optically perfect, soft and with significant purple and green fringing at its wider apertures, but that's not the point – if you're after the sort of 'look' this lens offers, then the lens itself is worth a look.