![]() Besides, if I need 50mm I still have my nifty fifty which I also love, so the 18-35 is no hassle. Like I said, it is an ART lens, and the quality they produce is simply unbeatable for 1.5x sensors. It seems hit and miss, and I think if I can get my hands on a few different ones, then surely one will be just fine. Some D7200 users have no issues whatsoever, some do. This lens let the AF systems of the camera (A77/A58/A55) hunt for focus, but almost never nailed it right, in manual mode, excellent sharpness from corner to. Maybe what I can do is go look at the second hand lenses people are selling and try out multiple different Nikon mounted versions of it, and test its’ AF consistency. There’s plenty of canon users who have equal as many problems as Nikon users, but it does seem the D500 has the most. For crop sensor cameras, I just don’t see you getting any lens that is just so sharp from corner to corner at f/2.8, let alone f/1.8. But the key thing I’ve found especially some friends I’ve seen use it, is that it truly is an ART lens. Yes the focal length is fairly narrow, and yes the lens looks to have issues with half of its users. I dunno.I think you need to ask yourself WHY you want the lens it's a 2x, 18 to 35mm zoom.that's a pretty narrow focal length range for a zoom that starts at 18mm.For APS-C, there are 18-55, 18-140mm, and up to 18-400mm zooms.Do you want the f/1.8 aperture option? Sigma has had so,so many autofocsuing problems over the years that they invented their accessory "dock", so users can tune their lenses so they work right.and yet.at times according to dPreview, even after microadjustment, there can still be focusing issues. So.as one can see, there is an actual AF issue with this lens, for some people. However, while double checking I found some not so raving reviews about autofocussing issues (both through viewfinder and LiveView) on the 'newer' Canon crop sensor models, such as the 70D, which I own.
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