Sigma 18mm f/2.8 Filtermatic

The Sigma 18mm f/2.8 Filtermatic is a camera glass that has a wide angle of view and a high aperture value. It has a manual focus system and can be used on full frame cameras. The lens has 5 aperture blades which are commonly used and provide a good bokeh effect. The lens has a 77mm diameter filter which is a commonly used size, and weighs 350 grams, so it may be heavy to carry around. The lens is 65mm long, which means it may require some consideration when packing in a camera bag. The lens is made with good quality materials and has a good resolution. It is coated to reduce glare and improve image quality. The lens is manufactured with care and attention to detail, which ensures its durability and reliability. There are alternatives to this lens available in the market, but the Sigma 18mm f/2.8 Filtermatic is a good choice for those looking for a wide angle lens with a high aperture value.

Optical design

Has 5 aperture blades, this number of blades are commonly used. Having rounded blades provides out of focus circle shape closer to a circle. Bright lens thanks to the high aperture value

Physical characteristics

With a lens filter diameter of 77 mm this lens deserves a good quality filter, this is commonly filter size, presents numerous filter possibilities. 65 mm long, this small lens should be always in the camera bag. Weights 350 grams so plan ahead, carry only if really necessary.