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The Heliopan 40.5mm #13 Green Filter is a basic contrast filter, primarily for use with black and white film, that darkens blue and red tones while lightening green tones. It is especially useful for portraiture as well as outdoor scenes with foliage. There is an approximate 3x filter factor with this filter, requiring an increase of 1.5 stops for normal exposure.
The front and rear surfaces of the filter both feature a single anti-reflection coating. Each coating helps to increase light transmission by reducing reflections, scattered light, and ghosting. Additionally, they offer protection to the filter substrate while helping to keep the glass clean for longer than uncoated glass.
This Heliopan filter is constructed from Schott glass for increased optical clarity and color fidelity. It features a brass filter ring for durability as well as jamming prevention.
Green contrast filter for black and white film darkens blue and red tones while lightening greens.
Ideal for portraiture and still life applications, as well as outdoor shooting with foliage.
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.
Dual threading with 40.5mm front filter threads permits combining with other filters.