Sigma AF 18-35mm f/3.5-4.5 Aspherical

This camera glass has a range of focal length from 18mm to 35mm, which is useful for landscape and architectural photography. It has aspherical lens elements which helps to reduce distortion and enhance image quality. The lens coating helps to reduce ghosting and flare, making it a good choice for shooting in bright conditions. The build quality of the photographic lens is good and it is durable. It has a maximum aperture of f/3.5-4.5 which allows for good low light performance. The resolution of the lens is high, which means that images will be sharp and detailed. This lens is available in different mounts, making it compatible with different camera brands. There are alternatives available in the market, such as Tamron 17-50mm f/2.8 and Canon EF-S 17-55mm f/2.8 IS USM. This lens can be used with autofocus or manual focus, depending on the user’s preference. Overall, Sigma AF 18-35mm f/3.5-4.5 Aspherical lens is a good choice for photographers who want a versatile lens for wide angle photography.

Positives:
– The build quality of the lens is good and it feels solid in hand.
– The zoom range of 18-35mm is very useful for wide-angle shots.
– Autofocus is quick and accurate.
– The lens is affordable, especially compared to some other lenses with similar specs.

Negatives:
– The color of the photos tends to be on the dull side, especially when compared to other lenses.
– The lens doesn’t have image stabilization, which could be a problem in low light situations.
– The lens is not weather-sealed, which could make it vulnerable to dust and moisture.

Conclusion:
Overall, the Sigma AF 18-35mm f/3.5-4.5 Aspherical lens is a decent choice if you’re on a budget or just starting out with photography. However, it falls short in some areas such as color rendition and lack of image stabilization. If you’re looking for a lens to use for professional work or frequently shoot in challenging conditions, it may be worth investing in a higher quality lens.

Optical design

Has 6 aperture blades, this number of blades are commonly used. Having rounded blades provides out of focus circle shape closer to a circle.

Physical characteristics

71 mm long, requires consideration if you want to carry in the camera bag. 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. Weights 280 grams so consider putting to your camera bag.