| Latest Review Posted | Sigma APO DG OS HSM 150-500mm F5-6.3
This lens surprizes and challenges in the field. Not good for fast sports, AF cannot quite keep up. The instructions verify it takes one second to both autofocus and stabilize. Its provided attributes must be understood to meet its rendering challenges of subject and environment. There are features switches, focus, and zoom controls on the lens body, a balancing support mount "foot", as bear on requirements placed on the camera controls for best employing its attributes. I tried matching it with the various mounting options for supporting and balancing such long lenses coupled to a camera body: large tripods, with and without gimbals, monopods, with and without varied ball heads, crouch low on the ground spreadable lightweight packable tripods, or window mounts with medium to beefy ball heads (for determining a workable shutter speed and aperture combo to achieve focal length sharpness needs, etc.). It is good to put drag on the support mount, but not lock it down if using the OS feature. Add to this the use of two switchable optical stabilizers inherent to the lens, or the one in the selected DSLR. Active users ask when and which to use?
I am challenged living by Rocky Mountain National Park, where resident animal behaviors are easily addressed by the autofocus, and its overrideable manual focus tweaking capability. I love the challenges of orchestration. I use the aps-c format for reach and stability (offers great detailing). The lens is not too big to be easi... |
