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That is why I replaced my Nikon 16-85mm (along with a Tamron 17-50 F/2.8 VC) for the Sigma 17-70 C.  Both of my mid-range zooms required one AF fine tune setting for wide angle, and another for...

It's not 16mm F/1.8, but the Samyang 16mm F/2 is awesome.  If you can live with manual focus, I suggest you try it.  Of all the fast glass I've used, it is probably the best I've seen at F/2,...

I flashed mine this morning, the scrolling bug still occurs.That said, this is a phenomenal lens. I had a Nikon 16-85 and a Tamron 17-50 VC and this lens easily replaced both. Both lenses had...

I had the opposite reaction.  My Nikon 16-85mm did not have an AF setting that worked throughout the zoom range.  It required a different AF setting for 16mm, 35mm, and 85mm.  If I set the correct...

Question: Do all F/1.8 lenses have this "focus" issue, or just the Sigma 18-35mm? Or are we mistakenly blaming the Sigma for what might really be a body PDAF issue? What if the PDAF is tuned for...

I normally don't comment, but I hate to see a misunderstanding potentially kill sales of an awesome, innovative lens. PDAF systems are typically designed for an F/2.8 light cone (at the widest). ...

I own and have used extensively a Sigma 150-500 OS on a D90 and D7000 camera. Like others, I wouldn't recommend this lens for birding.  It's a great airshow lens, but birding tends to have you...

Isn't that the truth!  Just yesterday, I was shooting Great Herons nesting with a 5" F/7.5 telescope with my D7000 (about 1400mm FX-equivalent focal length, 950mm native), and the birds are barely...

According to Roger, not even the mighty Nikon 24-70 is weather sealed (other than the mount gasket).  They disassemble these lenses all the time, and when I asked him in his 24-70 teardown article...

You're right, I should have underexposed it even further to eliminate the highlight crushing, but I couldn't easily tell in-camera at the time.  And of course, I'd get better results with a...

One of the things I love about my D7000 is the ability to do one-shot HDR.  Often the dynamic range of a scene is very high, and I want to capture it.  I'll shoot to the right, which generally...

Not sure I agree with that.  From what I've seen, it's an order of magnitude easier and cheaper to get razor sharp pictures from corner to corner with DX than with FX.  With FX, you usually need...

While I generally agree with the rest, I'd try to get an f/1.4.  The main reason for getting an 85mm when you already have the 70-200 is the extra aperture for light gathering (or if you really...

Yes, 5 stops is rather extreme for pushing the shadows, but my D7000 can be pushed that hard without banding.  Sad to see that the D5200 (and likely the D7100) has this banding issue.  Nikon should...

Since you have the 35mm, I'd go with a significantly different focal length for your macro.  My suggestion?  Get either the Nikon 85mm F/3.5 VR, or the Tamron 60mm F/2 macros.  The Nikon is around...

Yes of course.  All this is known.  However, in *this* case, a D800 with an 800mm F/5.6 can be replicated by a 36mp DX camera with a 500mm F/4, even in the morning.  My point was that by dropping...

An alternate would be a DX + 500mm F/4.  The main obstacle would be the lack of a current-sensor pro-level DX camera (e.g. the d400).  Maybe the upcoming D7100 would be good enough? The way the...

Samyang has actually made 2 versions of their 14mm F/2.8 lens.  The earlier version was ok, but the newer version was (and still is) phenomenal (according to the reviews).  Make sure the version...

Actually, it's the aperture that's important, not the focal length.  A 2000mm f/4 will work fine with a 24mp DX sensor, and it will have lots of "reach".  Of course, it'll weigh more than your...

Very true.  I compared a brand new Sigma 17-50 F/2.8 OS to my then 9-month-old Tamron 17-50 F/2.8 VC back in late 2010, and found the Tamron to be as good or better wide open.  And this was before...