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|Weight||4.33 lb (1.96 kg)|
|Dimensions (dxl)||Approx. 4.1 x 8.6" (10.41 x 21.84 cm)|
|Filter thread||95 mm|
|Aperture||Maximum: f/4.5 - 6.3
|Maximum reproduction ratio||1:3.1|
|Camera mount type||Pentax K|
|Angle of view||46.8° - 5.0°|
|Minimum focus distance||1.64' (49.99 cm)|
|Focal length||50 - 500 mm
Comparable APS-C Focal Length: 75 - 750 mm
|Format compatibility||Pentax Digital (APS-C)|
The Sigma 50-500mm APO DG OS HSM F4.5-6.3 is Sigma's latest version of their 50-500mm superzoom lens, commonly known as the "Bigma". Introduced in February, 2010, it replaces the old 50-500mm F4-6.3 EX DG HSM and features a slightly modified optical formula, losing half a stop at the wide end in...
The first version of this lens earned the nickname Bigma for its 4.25-pound heft and huge size.Now comes Son of Bigma ($1,600, street), lighter at a little less than 4.2 pounds, yet with a number of optical improvements including image stabilization.Like the original, this 50–500mm boasts the...
If your thing is wildlife and you want to lug only one lens you may consider the Bigma as it's versatility can not be beat. At 200mm its useful for those quick shots of dragonflies and butterflies.
Poor in Low Light, Slow Focus
I have not been happy with the auto focus. I have used this lens with both a cannon T3 and a cannon 70D. The problem is it will no come into focus. I have contacted sigma asking if there is anything that can be done about this. I have not yet gotten a reply.
I'm currently in my second two week rental of this lens. Note that is second rental, not second week of the first rental. I think from the fact that I opted to rent it again, you may be able to guess that I rather like it.
Sharp at all focal lengths., Stunningly good bokeh, Good AF., Outstanding OS., Killer Range., 500mm handheld!, Lightweight (relatively speaking), Price
Only f/6.3 at the longest focal length, Still somewhat heavy when compared to say, the 300mm f/4. That said, you get a lot more reach with the Bigma OS., Some minor chromatic aberration, especially in high contrast situations, AF has trouble with cluttered shots (brush in front of the subject).