|DC||The lens is designed for APS-C digital cameras.|
|HSM||The lens is equipped with ultrasonic motor to provide very fast and virtually silent autofocus. Learn more|
|| A||Art series lens designed with a focus on sophisticated optical performance and abundant expressive power. Delivers high-level artistic expression.|
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|Diagonal angle of view:||30.4°-15.5° (Canon APS-C)
31.6°-16.1° (Nikon APS-C)
27.9°-14.2° (Sigma APS-C)
|Lens construction:||21 elements in 15 groups, including 3 FLD, 4 SLD|
|Closest focusing distance:||95 cm|
|Number of diaphragm blades:||9|
|Type of autofocus motor:||Ultrasonic (Canon EF)
Ultrasonic (Nikon F)
Ultrasonic (Sigma SA)
|Full-Time Manual Focus:||Yes|
|Weight:||SA: 1490 g|
|Maximum diameter x Length:||SA: Ø93.5 x 170.7 mm|
|Materials:||High-quality plastic barrel, metallic mount|
|Filter size:||82 mm|
The lens barrel is large, heavy, made of high-quality plastic (TSC). The lens mount is metallic.
The lens features AF/MF focus mode switch.
|AF||Autofocus mode with Full-Time Manual Focus.|
|MF||Manual focus mode.|
The lens uses front filters with standard size of 82 mm which are easy to find. However, filters of such size are more expensive and mainly used with professional lenses.
The filter thread does not rotate during focusing which allows convenient use of different types of filters (including but not limited to polarizing and gradient).
Low dispersion elements (AD, ED, LD, HLD, SD, UD etc) and fluorite elements minimize chromatic aberrations and ensure excellent sharpness and contrast even at maximum aperture.
The lens does not feature optical image stabilizer. It is a significant disadvantage for a lens of such class - the need for image stabilization only grows with increasing of focal length. In order to obtain sharp images with this lens, you will need to use a tripod or shutter speeds not longer than 1/100 second (at focal length of 100 mm) which may require in some cases increasing the ISO setting and will lead to noisy images.
|Camera||Canon EOS 50D|
|Sensor size||22.3×14.9 mm|
|Distortion at 50 mm||-0.17 %|
|Distortion at 100 mm||+1.35 %|
|Vignetting at 50 mm F/1.8||-1 EV|
|Vignetting at 100 mm F/1.8||-1.17 EV|
Typical Application1) Distant landscapes with perspective compression effect
|Prime lenses for Canon EOS DSLR cameras|