Sigma 150-500mm f/5-6.3 APO DG OS HSM
We’ve given this now obsolete lens a fourstar rating and Great Value awards before Released: 2008 Price new: £700/$800 Price used: From £350/$500 For big telephoto reach without a huge price tag, this Sigma is a long-standing favourite. It boasts a much faster, ring-type ultrasonic autofocus system and a more effective optical stabiliser than Nikon’s original AF VR 80-400mm. It also has a longer available focal length, equivalent to a whopping 750mm on the D7000 and other DX bodies.
Optical highlights include three Special Low Dispersion (SLD) elements to boost sharpness and contrast while reducing colour fringing, and Sigma’s super multi-layer coatings to minimise ghosting and flare. The lens is also well built, but lacks the weather seals featured in Sigma’s current lenses.
At a shade under 1.8kg (3.9lbs), the lens is sufficiently lightweight for short periods of handheld shooting, but comes with a mounting collar to attach it to a tripod or monopod. Key points Autofocus system The ring-type ultrasonic AF system moves the small rear elements of the lens, for fast operation and accurate tracking of moving objects. Full-time manual override is available in Single AF mode. Dual-mode OS The optical stabiliser has two modes of operation, available via a switch on the lens barrel. One is for static shooting, the other is for panning. You can also switch it off. Tripod mounting collar Everything feels nicely balanced when the collar is attached to a tripod or monopod. Unusually, the foot is shaped so that it also works effectively as a finger grip for handheld shooting. Specs Elements/groups: 21/15 Aperture range: f/5 to f/22 Autofocus type: Ring-type USM Minimum focus distance: 2.2m Maximum magnification: 0.19x Filter thread: 86mm Dimensions: 95x252mm Weight: 1.78kg