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Heliopan 30.5mm Light Yellow Filter (5) from www.thelafirm.com

Heliopan 30.5mm Light Yellow Filter (5)

HEL-730502
Regular price
$68.93
Sale price
$48.25

Single coatings on both the front and rear offer protection to the glass and help to improve light transmission and image quality.
Constructed from Schott glass for optical clarity.
Brass filter ring helps to prevent jamming and provides additional strength

The Heliopan 30.5mm Light Yellow Filter is a basic contrast filter, primarily for use with black and white film, that is primarily used as a haze filter to subtly darken blue tones and increase overall contrast. There is an approximate 1.5-2x filter factor with this filter, requiring an increase of 0.5 to 1 stop for normal exposure. For all outdoor photographs. Small correction to blue sky, improved contrast in distance photographs.