Wildlife photographers who shoot with Sony have been limited with lens choices. The Sony 100-400mm GM was released in early 2017, but the price - $2,498, was out of reach for many. Last year, Sony released the 200-600mm G which was a bit more budget friendly at $1,998, but is a pretty large lens to carry around on wildlife hikes. Recently, Sigma announced that their 100-400mm Contemporary lens would be coming out soon for Sony E-Mount and Leica/Panasonic/Sigma L-Mount. We had the chance to test out an E-Mount 100-400 for a few days - read on to see what we thought.
The look of the lens is traditional "Global Vision" Sigma. It has the same black finish, and a little silver "C" inlay. You get a Focus Mode switch (AF/MF - no manual override choice like on the non-mirrorless version of this lens), focus limiter switch (full range, 6m-infinity , and 1.6-6m), OS Mode switch (1, 2, Off), and an AFL button. The lens is missing the Custom Settings switch (C1, C2, Off) that is found on the non-mirrorless version. The lens has a lock switch, which is only enabled at 100mm, and lacks a tripod collar (which can be purchased separately). While it's a lightweight lens, finding good balance might be an inconvenience for those wanting to use it on a monopod without a collar. The optional tripod collar is the same one that comes with the Sigma 105mm f/1.4 ART, and has an arca-swiss foot, but does add some heft to it.
PerformanceWhile at first glance it seems like this lens is just a Sigma 100-400mm with an MC-11 welded on, Sigma says this lens was designed exclusively for full frame mirrorless cameras. The autofocus works well on the variety of Sony bodies we tested it on, including Eye-AF for both humans and animals. Having used the Sony 100-400mm GM a handful of times, there wasn’t much of a difference in terms of autofocus speed and tracking. Compared to the older Sigma 100-400 Contemporary on a Nikon D750 and on a Canon 7D II, the DN version of this lens seems to have faster overall autofocus (when tested on a Sony A7 III, R III, and A9). This is likely due to Sigma’s use of a new stepping motor to provide faster and quieter autofocus. The performance compared to an EF mount 100-400mm with a MC-11 is pretty noticeable, and if you have a MC-11, don’t bother saving the $200 to get the EF version.
While the sharpness may not be equal to the 100-400 GM in the corners, the majority of shooters likely won’t notice a difference, other than the slower aperture and having to bump your ISO a bit. Sigma claims the image stabilization in the lens provides up to 4 stops of compensation, which paired with Sony’s IBIS should allow for photographers to get sharp images at slower shutter speeds.The close focus distance of the Sigma isn’t as impressive as the Sony 100-400mm GM, but when comparing 2 images at 400mm taken at the minimum focusing distance, the Sigma seems to have a slight edge in sharpness in this situation. Vignetting and distortion aren’t too bad, but are definitely the most noticeable at 400mm. Chromatic aberration is minimal, even in high contrast situations.
Real World Use & Sample Images
If you’re looking for a long zoom lens, but don’t want to pay Sony prices, the Sigma is definitely worth taking a look at. At almost a third of the price, the Sigma will allow for more photographers to get the superzoom reach that is needed for wildlife, birding, and sports photography without breaking the bank. It’s also worth looking at if you like to shoot telephoto landscapes. The Sigma 100-400mm DN for E-Mount and L-Mount will be priced at $949, should be available around July 13th, and can be pre-ordered here.