I know what you’re thinking: Scope rings are pretty much the same. Oh, how wrong you are. The wrong rings can impede your accuracy, no matter how consistently your rifle shoots. Their one job is to ...

Best overall The best lens for astrophotography overall The Sigma 14mm f/1.4 DG DN Art lens is great for astrophotography thanks to its speedy autofocusing, but it can handle hybrid shooting as well.

The risk of nodules being cancerous increases as they become larger. By definition, a nodule is smaller than 30 mm. Diameter Risk of being cancerous more than 10 mm These nodules have about a 15.2 ...

Fluid couplings are torque-transmitting couplings that use hydraulic oil or water to transmit power. They differ from torque converters in that the input torque is equal to the output torque (no ...

All sizes except 1/2" comply with Mil-Spec A-A-59326 for interchangeability. 1/2" x 1/2" are not specified under Mil Specs. Polypropylene material is glass-filled for added strength and durability.

(From Tamron lens literature) The optical system of the new SP AF 14mm F/2.8 Aspherical (IF) lens, composed of 14 elements in 12 groups, includes two Hybrid Aspherical lens elements. These large ...