field curvature

[′fēld ‚kər·və·chər]

(optics)

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95) features a proprietary field-flattener lens system to correct for field curvature and other optical aberrations across its entire 76.

Astronomy binoculars

Standard lens has inherent optical aberration called field curvature.

Getting started with macro photography

Generally, in any riflescope, distortion and field curvature are greater at lower powers.

Parallax and distortion: how to adjust your scope

Field curvature is still present so the point image is not on the FPS.

Maximising lens appearance: dispense with confidence part 1 C-19373 O/D

In addition, the StitchArt plus option integrates many automatic procedures and adjusting functions, including, among others, autofocus, automatic contrast and brightness optimization, automatic orientation of the scan field, and precise first order correction of the objective's residual field curvature.

New LSM: makes doing a better job easier: an innovative high-tech laser scanning microscope makes using state-of-the-art equipment a breeze

The lens' optimized power distribution helps to minimize field curvature, prevent a loss of image quality at the edges of photographs and produce outstanding image quality.

Sigma Corporation Announces Four New Lenses at CP+ Camera and Photo Imaging Show 2013

At the prime focus is an additional four-element lens that corrects field curvature, critical for sharp images across the entire imaging plane.

Celestron's: superfast astrograph: Celestron's update of the Schmidt astrograph delivers super-sharp images across an expansive field. Is there a catch?

This 2-inch unit inserts into your Newtonian telescope's focuser in front of the eyepiece or camera, correcting distorted stars near the edge of the field due to coma and field curvature.

Coma fix

How will a particular telescope's field curvature affect images that you shoot through it?

Optical tell-all

Designed to correct the field curvature of f/6 to f/8 refractors, the unit is ideal for the AT106 apo reviewed by Alan Dyer this month.

A new name in apos: the AT106 refractor: a 4.2-inch triplet apo for $2,100? Is this a price breakthrough or something that's too good to be true?

As with most triplet apos, however, the scope's inherent field curvature meant star images were sharply focused across only a central 15-mm-diameter image circle.

Short and sweet: does TMB's new 92-mm refractor live up to the claim that it's a replacement for the legendary Astro-Physics Stowaway?

With a DX-format DSLR camera attached to the scope and squared to the optical axis, I could see the effects of field curvature only at the corners of the frame.