There is as you would expect a slight lowering of contrast and little bit of veiling flare wide open but appropriate adjustments to the RAW files easily deals with that, chromatic aberration is a little more pronounced wide open but I have seen raw files from the Olympus 17mm f1.8 and I reckon the Big Sig is way better in this respect. So the ergonomics are not perfect but is it worth the hassle, absolutely, it is a superb option for serious shooting, but just so we are all clear this Nikon version is a manual lens when used on M4/3, there is no auto focus option at all and no recording of the lens parameters either.įor most people the prime question would be “does it work well wide open” after all why go this route if you were only planning to shoot at f5.6, in short, yes it is very good wide open, I don’t have the Olympus 17mm f1.8 or 25mm f1.8 for comparison but I feel pretty confident it would be at least as good as they are wide open, albeit with a very considerable weight penalty, it does weight over 800 grams you know! ![]() In the end it actually works fine once you realise the lens not the camera is the primary grip, and it will work far better if you were to purchase one of those add-on alloy base plate grips on eBay that you can get for the EM5 mk2 and Mk 1. What we have here is not so much a lens attached to a camera but more like a camera attached to a lens. On the marriage aspect, the pairing of the Sigma and the EM5 mk 2 is at first a little odd, kinda of like attaching a 4 wheel caravan to a Suzuki Mighty Boy ute, they are just not meant to go together. So the thought then struck, these files are so good that really they should be used as the standard against which all my other lenses are measured, which means friends that I had to go back out that afternoon and shoot some more general type shots to prove the point and whilst I was at it, I may as well write the review of Big Sig first and follow up with reviews of the other lenses later. ![]() God damn, wow, holy cow batman, sh…., those are some sharp files dude! Ah, so the adapter was rubbish after all, phew, well that’s an $800 Aussie Dollar relief. Once home I popped the files onto my 5K iMac and opened them in *Iridient Developer to take a gander, ready for yet more disappointment at the result. With some trepidation last week I took Big Sig down to my regular lens testing ground and shot off a few frames at different focal lengths and then promptly went off for a morning coffee with a mate at my favourite haunt. Whats more, everyone else was saying it was a marvel of modern optics, could be used as a scalpel, make coffee, elevate you to a higher astral plane and all that, I felt it was worth at least further investigation, anyhow I ordered a nice new adapter. So when I got my shiny new EM5 mk 2 I wasn’t super eager to get down and dirty with Big Sig.īut I had a thought, what if the adapter I was using was no good, I really didn’t suspect this initially, as all was fine with my other Nikon lenses ( my Sigma is a Nikon G mount version) but it seemed a waste to have a reasonably expensive lens sitting there unused. In short, I kinda felt well, short changed and I am short enough to start with. Tis like this, when I first tested the Big Sig on my old Pansonic GH2 I was actually quite disappointed, it really only seemed to resolve well in the centre of the frame and was quite variable in performance at different focal lengths. I have yet to take each of the lenses out on an extended variable subject shoot so as I can make some final conclusions and piece together a meaningful reviews for each lens, but nonetheless I know enough about them to make some strong conclusions. I have already ran all the preliminary tests on every lens mentioned in that post and know quite precisely how they all perform, it could be a good read for those interested in some general impressions on M4/3 options (especially Olympus EM5 mk 2 owners), here is the link: ![]() Well as they say, “something funny happened on the way to the forum” and plans in this case got reversed. At the time, I mentioned almost in passing that I would be also testing the Sigma 18-35mm f1.8, but at the end of all the lens testing proceedings. Just a little background info, in the previous post on my blogsite, where I provided some insight into my current explorations of legacy lenses and the M4/3 system (specifically the Olympus EM5 mk2). There are heaps of articles on how great it is for video but it seems not so much (very little in fact) on the stills end of things, especially when shot in RAW. The Sigma 18-35 with the OM-D E-M5 = HIGH GRADE STILLSĪ big hello from Australia Steve, I thought a few of your readers might be interested in how the amazing Sigma 18-35mm f1.8 performs when it is used on the M4/3 format, for stills.
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