APS-C / 1.52x
No
9 mm.
14 mm.
1.00x
No
No / n.a.
Diaframma
f/2.8
7
Sì
No
No
Messa a fuoco
No
Sì
Diretta
Sì
12 cm.
0.13x (equiv. in 35mm)
Costruzione
No
15/10
2 asferici, 3 a dispersione extra bassa
49 mm.
No
No
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Link utili
OpticalLimits 7.3/10
It's super-sharp in the image center and if you avoid f/2.8 the borders/corners are decent. Lateral CAs are generally not an issue. Image distortions are extremely low for a lens of this focal length. The primary weakness is vignetting which is rather extreme at max aperture, at medium aperture settings, it's a lesser issue. Flare in strong contra-light can produce quite a bit of glare. All-metal construction and tight control rings.