Horseman 67mm Center Filter for SW Series Lenses - 2.5x

Horseman 67mm Center Filter for SW Series Lenses - 2.5x

Horseman 67mm Center Filter for SW Series Lenses - 2.5x

B&H # HOCF67P2.5 MFR # 29225
Horseman 67mm Center Filter for SW Series Lenses - 2.5x

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  • 1Description

This Horseman 67mm 2.5x Center Filter is used when working with ultra-wide-angle lenses; the fall-off of illumination towards the corners is sometimes disturbing. For this reason, concentrically graduated center filters have been designed to compensate for this vignetting.

These filters have a transparency which increases gradually from the center to the edges of the filter, where it reaches full transparency. The transmission is independent from the wave length of the visible spectrum.

In order to avoid over exposure, and with consideration of the exposure latitude of the film emulsions, we have not fully compensated for the vignetting of the lens. It must be remembered that, when working with ultra-wide-angle lenses, one should avoid high-contrast films, under-exposure, and non-uniform field illumination as much as possible.

This center filter is designed to mate with Horseman wide-angle lens units with 67mm filter threads.

Type Center filter
Size 67mm
Grade 2.5x
Filter Factor 1 1/3 Stops
Multi-Coated Yes
Rotating No
Effect Prevents light fall off on edges of frame
Application Wide angle photography
Color Temperature Not Applicable
Construction Glass
Front Filter Thread Size 86mm
Front Lens Cap Size 86mm
Packaging Info
Package Weight 0.55 lb
Box Dimensions (LxWxH) 7.7 x 6.8 x 1.1"
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