Sigma DC 10-20mm f/3.5 EX HSM

The Sigma DC 10-20mm f/3.5 EX HSM is a camera glass that provides a wide angle view for aps-c cameras. It has a fast and quiet autofocus system and is equivalent to a 15-30mm full frame lens. The photo lens has 7 aperture blades, which helps to create a circular bokeh effect. It weighs 520 grams and has an 82mm filter diameter. The photographic lens is 88mm long, which may require some consideration when carrying it around. The lens has a high-quality build and provides good resolution. The camera glass consists of multiple lens elements and has a lens coating to reduce reflections and glare. The manufacturing time is not mentioned. The aperture of the lens is f/3.5, which is average for this type of lens. There are alternatives available in the market, but the Sigma DC 10-20mm f/3.5 EX HSM is a good option for those looking for a wide angle lens with good autofocus and build quality.

Positives:
– Exceptional wide-angle lens with the ability to capture expansive landscapes and architecture.
– Sturdy build quality with metal construction, making it durable and long-lasting.
– The fast and silent autofocus system (HSM) makes it convenient for capturing moving subjects.
– The maximum aperture of f/3.5 allows for better low-light photography and shallower depth of field.
– The image quality is impressive, with sharpness and contrast that is a clear upgrade from kit lenses.

Negatives:
– The lens can be quite heavy and bulky, making it slightly inconvenient for traveling.
– The minimum focusing distance is relatively far compared to some other wide-angle lenses.
– Distortion and vignetting can be noticeable at the extreme ends of the zoom range, but these can be corrected in post-processing.

Conclusion:
Overall, the Sigma DC 10-20mm f/3.5 EX HSM lens is an excellent choice for enthusiasts and professionals who need a reliable wide-angle lens. It has its flaws, but the benefits of its capabilities outweigh any negatives. The lens excels in landscape photography, architecture, and creative perspectives, making it a valuable addition to any photographer’s toolkit.

Optical design

Full frame equivalent focal length is 15.0-30.0 mm. Average brightness in this league Has 7 aperture blades, mid-grade lenses usually have this amount of blades. Having rounded blades provides out of focus circle shape closer to a circle. It is a ring-type ultrasonic motor designed to provide quick and silent focusing.

Physical characteristics

88 mm long, requires consideration if you want to carry in the camera bag. Weights 520 grams so plan ahead, carry only if really necessary. With a lens filter diameter of 82 mm lens filters in this range can be expensive, purchase lens – and filter – only if you plan to keep them for long time, make a try with used ones.