... neutral density filter is needed to photograph the partial eclipse. A filter density of 5.0 is recommended. Such a filter appears nearly opaque. That filter, or adequate combinations of less dense filters, apparently are not available ...

... neutral density filter always be located in the path of vision between the .sun and the eye, whether the sun is viewed directly or through some optical such as a camera lens, a viewfinder, a telescope or binoculars. viewing 'to taking ...

... neutral density filter of metallic silver of from 5.0 to 6.0 density to be placed in front of the eyes or in front of the camera lens when viewing the stages of the eclipse. Such a filter can be made easily. Take a roll of Veri- chroome ...

... neutral density filter of minus four will diminish the light hitting the film by two f /stops. A minus two neutral density filter will cut down the light by one f /stop, the mi mis two and four NO fillers are easily found in local ...

... neutral density filter over the lens: With color films of from 25.32 ASA speed, shoot stills at 1/100 at f/5.6, movies at f/11. With films of ASA 64, close down one stop hi each case. With films of 125-160 ASA, close down two stops ...

... neutral density filter is needed to photograph the partial eclipse. A filter density of 5.0 is recommended. Such a filter appears nearly opaque. That filter, or adequate combinations of less dense filters, apparently are not available ...

... neutral density filter of metallic silver of from 5.0. 1!>fi3. f'«tint*r«. to fi 0 density to he placed in front of the eyes or in front of the camera lens when viewing the stages of the ecliDse Such a filter can be made easib Take a roll ...

... neutral density filter of 5.0: Kodachrome-X film (ASA 64), a shutter speed of 1-60 and lens opening of f/11. Kodachrome 11 film (ASA 25), l-125th at f/5.6. Panatomic-X film (SAS 32), M6th at f-8. During totality, remove the filters and ...

... neutral density filter permits you to photograph with fast film in Intense light without overexposing. The polarizing lense, mentioned in an earlier column, can be used to darken skies with color film as well as black and white It also ...

... neutral density filter between the ob servers In the courtroom and one of the two screens when the color slides were shown. When the courtroom was dark- ened, both pictures appeared to be of the same brightness But 'When the room was ...