photo:sigmamft30mm
Sigma 30mm lenses for Micro Four Thirds
introduction
Sigma 30mm f/1.4 lens
specs
9 rounded blades
AF stepping motor
close focus 30cm
52mm filter
64.8×73.3mm
265g
$US460?
reviews
Sigma 30mm f/2.8 EX DN asph lens
version II lens
version I lens
extremely sharp in the centre and reasonably sharp edges wide open but for best central sharpness use f/4 and for best edge sharpness, use f/5.6
slight barrel distortion at 0.8% should not be much of an issue
CA is well controlled
the main downsides are:
why buy it when you have a kit lens covering this focal length?
wider aperture for lower light situations and improved ability to blur the background
nicer bokeh than most zoom lenses
sharper with less aberrations than consumer level zoom lenses
it is so cheap
specs
30mm focal length = 60mm in 35mm film terms = nice standard lens
f/2.8-f/22 aperture = an extra stop light and DOF performance compared to the kit lenses
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internal focusing
closest focus 30cm
7 elements in 5 groups = high optical quality with lovely bokeh
135g
61mm x 39mm long
reviews
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centre sharpness best at f/4-8 while edges are are best at f/5.6-f/8
“it may not offer the fastest aperture, best build quality or most features in its class, but it does deliver sharp results and snappy auto-focusing for a modest financial outlay. ”
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photo/sigmamft30mm.txt · Last modified: 2016/10/12 08:13 by gary1