| Review statistics for BigMackCam | | | Lenses Added | 2 (View Lenses Added) | | Reviews Posted | 3 (View Reviews) | | User's Lens View Count | 27,195 | | Latest Lens Addition | 
MIR 10A / 10M 28mm F3.5 | | Latest Review Posted | Sigma DC Macro HSM (Contemporary) 18-300mm F3.5-6.3
I've owned this lens for almost four months now and have used it quite extensively.
It's surprisingly sharp in the centre from wide open, but border performance is lacking unless you stop down to f/10 - f/11, and even then it's not great - but it's a superzoom, and that's one of the compromises for enjoying such a wide focal length range. Another compromise is the maximum aperture at each focal length, which means this a lens to use in good light only - otherwise, you quickly find yourself shooting at high ISOs. Bokeh is very nice, so long as you ensure sufficient distance between the subject and background. As with Tamron's superzooms and Pentax's own 18-270, there is a tendency to reproduce just-out-of-focus specular highlights as tiny donut shapes - it's annoying, but common with this type of lens and you simply have to be aware of it and work around it. There is a tiny amount of purple fringing noticeable in very high contrast areas, more pronounced in the borders and corners than in the centre, but it's not intrusive - in fact, it is so minor that I rarely bother removing it in post-processing, but it's easy enough to do if required. Autofocus is silent, accurate and reasonably quick. Manual focus isn't ideal because of the short focus ring throw, but it feels nice enough and is actually surprisingly effective - however, you have to switch both the lens and camera to MF; there is no full-time override. Build quality is surprisingly good for a consumer-grade lens - it ... | |
