With excellent optics and a fully internal zoom design, this lens is well-suited for lunar and solar photography.

The latter is a very versatile model, also boasting reduced chromatic aberration ... which is a rare example of a Schmidt-Cassegrain telescope that can be used by astrophotographers.

When Canon finally opened its lens mount to third parties, Sigma was the first to deliver, and I've been testing the 16mm ...

The most commonly used and the earliest example of an achromatic lens is the achromatic ... These two elements are placed (cemented) next to each other in such a manner that the chromatic aberration ...

As an avid birder, bird photographer, former safari guide, and founder of Best Binocular Reviews (BBR), I’ve had the privilege of using, testing, and reviewing a huge selection of binoculars. So, if ...

Tokina has announced its first-ever wide angle zoom lens for Fujifilm X-mount cameras. The atx-m 11-18mm F2.8 X joins ...

First released for Sony E-mount, the Tokina atx-m 11-18mm F2.8 will soon be available for Fujifilm X-mount users.

Structural variants in the human genome include cytogenetically detectable and submicroscopic deletions, duplications, large-scale copy-number variants, inversions and translocations. The ability ...

This article was originally published with the title “ The Discovery of Stellar Aberration ” in Scientific American Magazine Vol. 210 No. 3 (March 1964), p. 100 doi:10.1038 ...