Lenses -> Tamron 17-50mm F2.8 XR Di-II LD ASP IF Lens - Pentax Fit
The Tamron SP AF 17-50mm F2.8 XR Di ll LD Aspherical (IF) Pentax Fit lens is a lightweight, compact, fast standard zoom lens, designed exclusively for use with digital SLR cameras (APS-C Size). The wide-angle focal length of 17mm (equivalent to 26mm) obtains a wider angle of view than the standard zoom lens without any increase in size or weight. The fast f/2.8 aperture gives a natural out-of-focus effect which is great for portraits, whilst the minimum focusing distance of 27cm over the entire zoom range gives a maximum magnification ratio of 1:4.5 at 50mm. The Tamron 17-50mm f2.8 XR Di-II LD ASP IF lens optimises the overall distribution of optical power via the use of XR (Extra Refractive Index) glass. A Low Dispersion glass element is used to effectively compensate on-axis and lateral chromatic aberrations.
|Specification / Feature||Value||Scores *||Rank **|
|Number of Lens Groups||13|
|Number of Lens Elements||16|
|Optical Zoom ||2.94||9.14||46|
|Max Aperture ||2.8||77.96||17|
|Max Aperture Wide ||2.8||77.96||17|
|Max Aperture Tele ||2.8||49.27||17|
|Focal Length Wide ||17 (or 25.5 in full frame equiv.)||70.24||25|
|Focal Length Tele ||50 (or 75 in full frame equiv.)||51.44||44|
|Magnification Ratio ||0.22x||3.43||25|
|Min Focus Distance ||0.3m||95.85||23|
|Aperture Blades ||7||19.35||9|
|Sensor Format ||APS-C|
|1st/3rd Party ||3rd party|
|Lens Type ||Standard Zoom|
|Image Stabilisation ||No|
|Video Lens ||No|
|Tilt Shift ||No|
|Weather Resistant ||No|
|MF switch ||Yes|
|Filter Thread Size (mm) ||67mm|
|Included Accessories||Flower shaped lens hood|
|Lens Mount ||Pentax K (DA)|
|UK Price ||£299.00 at Amazon.co.uk (affiliate link)|
£299.00 at Wex Photo Video (affiliate link)
|US Price ||$206.85 at Amazon.com (affiliate link)||67.40||28|
* - Scores are calculated by comparing numerical specifications with other cameras. The highest ranking camera for a specification acheives a score of 100. The lowest ranking camera is scored as 0 and all the other cameras are scored in between 0 and 100 according to their merit.
** - Rank is calculated by ordering the scores for all cameras in descending order. The best scoring camera for a particular feature / specification will have a rank of 1.
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