The Sigma 15mm F1.4 DC Contemporary is an attractive prime lens for APS-C camera owners thanks to its small size, fast ...
Fujifilm has unveiled 14 concept X Mount lenses — none in development yet — spanning F1.0 primes, F1.4 zooms, APD filters, ...
Digital Camera World on MSN
Canon wants to make zooms more compact. But what is a catadioptric lens?
Canon has patented a bunch of lenses with mirrors for full frame cameras and I’ve made some educated guesses why ...
Digital Photography Review on MSN
7Artisans at CP+: two new lenses that are polar opposites
When you use DPReview links to buy products, the site may earn a commission. Photo: Mitchell Clark 7Artisans showed off several new lenses at its booth at CP+, introducing two new autofocus models ...
\(power \ of \ a \ lens \ (D) = \frac{1}{focal \ length \ (m)}\) A lens has a power of -3.33 dioptres. Calculate the focal length and state what type of lens it is.
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