Sigma 100-400mm F5-6.3 DG DN OS Review
There aren't too many telephoto zoom lenses for Sony Alpha cameras, so it's great to see Sigma joining the party with the launch of the 100-400mm F5-6.3 DG DN OS.
Commendably, it's not just an exact copy of the DSLR version, with an extra AFL button, a closer focusing distance at 100mm, and a new optional tripod collar.
On the negative side, it seemed to be more prone to hunting during focusing than the DSLR version, no longer has a distance scale, and you have to pay extra for that nigh-on-essential tripod collar.
Thankfully, the Sigma 100-400mm F5-6.3 DG DN OS offers very good image quality throughout its versatile focal range, whilst being light and compact enough to make it suitable for hand-holding.
Optically, though, it's no match for the admittedly pricier and heavier Sony FE 100-400mm F4.5–5.6 GM OSS, which is probably the telephoto zoom lens that Sony users most aspire to.
The Sigma 100-400mm F5-6.3 DG DN OS is still tack-sharp at both the centre and edges of the frame when stopped down by one-stop at all the focal lengths, with the exception of 400mm. Obvious vignetting at wide-open apertures is the only other real optical issue of note, and this can be easily corrected in post-production.
Build quality is very good, with the sober all-black design adding to the high-quality feel and the dust/splash-proof construction adding some peace of mind, plus there's a decent lens hood included, although the lack of a case/soft bag and even more importantly that all-important tripod collar are clearly concessions made to hit the aggressive price-point.
Overall, the Sigma 100-400mm F5-6.3 DG DN OS is a welcome addition to the rather sparse range of Sony full-frame telephoto lenses, especially priced at £899 / $949. You may have to also budget for the TS-111 tripod collar, but at least Sigma have seen fit to offer the option on this version of the lens.
If you're in the market for a versatile telephoto zoom that won't break the bank, then this new offering from Sigma should be at the top of your list.
|Ratings (out of 5)|
|Value for money||4.5|