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Sigma 24-70mm f/2.8 EX DG Macro Pentax Fit Lens
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|Shipping||—||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping|
|Sold By||Available from these sellers||Camera Centre UK||Amazon.co.uk||OvisTech||Amazon.co.uk|
|Item Dimensions||—||8.4 x 9.9 x 8.4 cm||7.3 x 7.3 x 9.2 cm||7.6 x 8.9 x 7.6 cm||8.84 x 10.92 x 10.92 cm|
|Item Weight||0.72 kg||0.57 kg||0.51 kg||453 grams||0.79 kg|
|Max Focal Length||70 mm||50 mm||75 mm||270||70|
|Min Focal Length||24 mm||16 mm||28 mm||18||28|
|Mounting Type||Pentaxbayonet||Pentaxbayonet||Canon EF||Pentax K||Pentax|
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Large aperture standard zoom lens provides superior performance both for Digital SLR Cameras and 35mm Film SLR Cameras To achieve an F2.8 aperture at all focal lengths, it employs three aspherical Lens to provide optimum aberration compensation. Two Special Low Dispersion (SLD) glass elements are provided for color aberration compensation, to assure high image quality. Optimized for digital SLR cameras It incorporates Super Multi Layer Coating to reduce the influence of harmful light caused by reflections from the digital image sensor. Excellent correction of aberrations Two SLD elements, one Glass Mold Aspherical plus two Hybrid Aspherical lenses provide excellent correction of various aberrations and a high level of optical performance. Minimum focusing distance of 40cm The lens has a minimum focusing distance of 40cm at all focal lengths and is capable of macro photography with a maximum magnification ratio of 1:3.8. DF (Dual Focus) System This lens incorporates a Dual Focus (DF) system that is designed to make the lens easy to hold during autofocusing, and yet provides a large focus ring for easy manual focusing. Petal Type Hood Since the front of the lens does not rotate, a Petal-type hood and circular polarizing filters can be easily used.
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This lens came at a good price, especially in the Pentax mount for some reason, and I given it's widest setting is (I think) a throwback to film rather than digital.
The lens has really nice build quality and gives lovely results. It's a fair size and weight but sits nicely on my K-r and feels well balanced. It's chunky size means it partially blocks the built in flash so factor in buying a separate flash.
Also bear in mind you will need to slide the lens collar to switch to manual focus, merely switching to manual focus on the camera body is not enough.
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BTW, I've also tried Simga 18-50 f/2.8 EX DG and I've returned it in favor of Sigma 24-70 f/2.8 EX DG.
Once I got the second copy, it has been pleasure using the lens. I'll just point out the highlights:
1) Excellent optical quality, no issues with CA or distortions at all focal length.
2) Image Quality at f/2.8 is very good and outstanding at stop down and peaks at f/5.6 in all focal length. If you're into sharp images this lens will deliver.
3) AF is relatively fast and not too loud.
4) 24-70 is still a great range for indoor use even with 1.5x crop factor.
1) it's big and heavy.
2) related to size, better to use external flash due to shadow with built-in flash with lens fully extended/at the widest end.
All in all, this is the lens I use for indoors most of the time, however it performs even better with full sunlight at outdoors. If you don't mind the bulky size or the extra weight, this lens will be one of the best glass you can buy in the range of 24-70mm on a pentax mount. If I ever make a switch/or add canon/nikon body, then this is the lens I'll buy again for the other body.
Drawback: Because it's such a big glass, I can no longer take pictures with the built in flash, if I do, it shows a shadow (part of the glass) so I have to always carry my exteral flash as well.
Otherwise it's a great glass! it works for macro and regular picture taking so long as you focus on the subject you are shooting.
My two samples were also slightly flawed but perhaps I just got unlucky because otherwise the lens is very well regarded.
I shoot with Pentax, Nikon, and Fuji cameras and the Sigma 24-70mm 2.8 DG lens is the only lens that I bought two of (one for my Nikon /Fuji cameras and one for my Pentax cameras).
I wouldn't call it the best lens in the world, but if I had to choose only one zoom lens to cover the 24-70mm focal lengths then this lens would be the one I choose.