Watch the video: What is focal length? Take two 50mm lenses: an f/1.8 and an f/1.2. Even though they both have the same 50mm focal length, they're not the same physical length – and neither of them is ...

Sigma has unveiled the Aizu Prime line, billing them as the world’s first lineup of large-format cinema lenses to achieve an aperture value of T1.3 across all focal lengths. Sigma likes making big ...

OPPO has taken the wraps off its next-gen hybrid optical zoom technology. The new camera technology still uses a periscope lens but with a new configuration. OPPO says the next-gen camera tech brings ...

Replay: Do we really need to keep using 35mm as our baseline for focal lengths, or is there a much better way? Why do we keep reading descriptions like ‘3.7 mm to 92.5 mm (equivalent to 28.8 mm to 720 ...

RONKONKOMA, N.Y.—Sigma Corp. of America has introduced the Aizu Prime Line of cinema lenses, billing them as the world's first lineup of large-format cinema lenses to achieve an aperture value of T1.3 ...