vignetting

This lens has shown to have lower vignetting than other Canon 50mm lenses.

This marginal coverage field produces images with often pronounced vignetting.

The 25mm Switar just abouts gets away with little vignetting.

Characteristic vignetting focuses the viewer's eye and adds to visual impact.

Image quality suffers particularly between 28-35mm and 80-90mm however, and there is heavy vignetting when used wide open.

It includes a permanent internal mask to create a soft vignetting on the corners of your image.

The smaller the aperture, the more abrupt the vignetting as a function of angle.

Such lenses will give noticeable vignetting if used on a 35mm film or full frame sensor camera.

These lenses give 40 of coverage, and are free from mechanical vignetting at f/22 and above.

Typically the image circle produced by a lens is large enough to cover the film or sensor completely, possibly including some vignetting toward the edge.

Vignetting, or light falloff, darkens images near the corners.

The drawback is the system will have a high focal ratio, with a correspondingly dim image, and some vignetting.

Criticism includes occasional vignetting, and some chromatic aberration.

Because of this, if the lens is used on a non-crop body, such as a Nikon D700, it will cause significant mechanical vignetting.

Unlike the previous types, natural vignetting (also known as natural illumination falloff) is not due to the blocking of light rays.

An additional reason is that the lenses produce a smaller image circle of even illumination (circle of no vignetting).

Fortunately, it is possible to fix smaller (67mm and larger) filters within the recessed front opening of the lens without causing excessive vignetting.

"toy" lenses that mimic the vignetting and variable sharpness of classic Holga or Diana plastic cameras.

However, those lenses produce unacceptable vignetting when used with 35mm film or full-frame digital SLRs.

Optical vignetting is sensitive to the lens aperture and can often be cured by a reduction in aperture of 2-3 stops.

Wideangle rangefinder designs and the lens designs used in compact cameras are particularly prone to natural vignetting.

Some modern lenses are specifically designed so that the light strikes the image parallel or nearly so, eliminating or greatly reducing vignetting.

All DA lenses can be mounted on Pentax film bodies, albeit with increased vignetting.

The front cap adaptor ring causes severe vignetting at the shorter focal lengths (wider fields of view), if it is not removed.

The lens of the Vidster is extremely small, resulting in an image with slight vignetting of image sharpness.