Sentences with phrase «with neutral density filters»

Brightness of a 5 ° spot was varied with neutral density filters (minimum steps of 0.1 log) until a response was obtained that was double the background activity, yielding the threshold level for that point on the visual field.

In these words, Juan Valderrama y Aguilar, a 17 - year - old amateur astronomer, described what he saw from Madrid on 10 September 1886 with his small telescope, with an aperture of just 6.6 cm and equipped with a neutral density filter to dim the solar light.

Not exact matches

macjohn is a neutral density filter on a DSLR with short exposures and small aperture enough to prevent damage to my camera?

Photo Tip: I used a neutral density filter to capture this shot because I wanted to slow down my shutter speed in order to get a feather effect with the water.

Designed with a built - in Neutral Density filter, the lens gives the user greater control over exposure time in different conditions and gives photos a more neutral appearance even when over-eNeutral Density filter, the lens gives the user greater control over exposure time in different conditions and gives photos a more neutral appearance even when over-eneutral appearance even when over-exposed.