Sigma 30 mm F1.4 DC DN for M4/3

I've attached a couple of unretouched, straight-from-the-camera examples that hopefully show the sharpness and bokeh of this lens, in low and bright light. What's great about the Sigma 30mm f/1.4? Firstly it's sharp and bright! I was able to get pin-sharp results handheld at night with just a table lamp in the room. Secondly, it feels like quality; with nice weight in the hand and is reassuringly solid to the touch. The focus ring turns like butter: perfect. Value for money, this is a no-brainer: the Sigma lens is easily as good or better than more expensive alternatives. My only possible question about this lens is the bokeh, which I'm still trying to make up my mind about. Purely subjective of course but is it a bit busy in bright light? Overall, this is a definite "buy" if you are looking for a very good quality lens with a bright aperture and don't want to spend a mint.

I have recently switched to Micro Four Thirds from Four Thirds, and this lens has been the best thing about the move. Lives pretty much full-time on my Olympus OM-D EM10 Mk II (a great camera of itself). When I bought that I also got the Olympus 25mm f1.8.....an excellent lens in its own right, if there's a difference between that and the Sigma it's in the latter's colour rendering (I like full, rich colour and the Sigma deivers that in spades, maybe a little saturated for some tastes). And images are pin-sharp 9.5 times out of ten. The Sigma is a much bulkier lens than the Oly, but on the EM10 it adds substance to the overall look and feel of the camera in use. On the EM-5II it looks pretty standard, and is equally a joy to use. The advisory......reading about this lens online brings up references to a tendency to focus-hunt, even stopped down and in good light.....have to say I have seen this on the EM10 and it can be distracting. I will check it out on the EM5 as well. What appears to eliminate it is to set the camera to S-AF/MF, though I will monitor this aspect of performance. I can see that for some it would be a deal-breaker - it isn't for me as the all round optical performance is that good, and I'm finding 30mm a better focal length to work with than 25mm for everyday, carry-around use (though in a bag rather than a pocket given the size of the lens). On Olympus cameras the lens firmware is updated with the lens in-situ, and I'm using the most recent version. It's not a consistent issue, but it is a noticeable one, and hopefully there is a fix somewhere down the pipeline. I'm looking forward to the 16mm f1.4 version of this lens, and it would be a shame if that were similarly afflicted. But if you have an m43 camera, this is a lens you really must have. The focus issue is the only slight downside....in every other respect this is a lens you are likely to become seriously attached to. Go and enjoy.

Feels really well made. Very smooth operation. Staggeringly sharp, even wide open. Lovely colour rendering. Bokeh is excellent, and the f1.4 aperture excels in low light or merely to isolate the subject. I am using this on GH5 and GX85 MFT bodies, so it translates to a 60mm in 35mm terms. Top class glass!

Great fast lens for my GX9. Excellent bokeh and super shallow dept of field, perfect for environmental portraits. However Color fringing is intense with this lens, which not all can be corrected with Lightroom.

I bought this for a Lumix G9 and it takes superb pictures, it is just so sharp. The G9 doesn't have great focus but this lens still manages to focus well and you will end end with super sharp images. The build quality is just superb, it is a bit heavy, but feel the quality. It is a must own lens for MFT users.

with out doubt the best lens I've ever bought, great depth of field, great sharpness, brilliant for portraits, street photography any subject matter really its superb. I'm pleased I've started with the 30mm rather than the 16mm, personally I think it's more versatile for the photography I do. Great auto focus and the picture quality is second to none.

Awesome lens at a bargain price. I loved my old 50mm 1.4 Sigma Art lens when I was using full frame but for the micro four thirds this is an ideal portrait lens

This lens is brilliantly sharp quick focussing. Wonderful smooth background bokeh with a very Shallow depth of field with its F1.4 aperture. Nice focus length for portraits on M4/3 equivalent to a 60mm on a full frame. Although its plastic construction its of a very good quality build the hood could be a little tighter. It's most definitely a very worthy lens and unless I get rid of my M4/3 camera this lens is going nowhere 10 out of 10