Type B: Matte/Fresnel field with 3mm¢ fine-ground matte focusing spot and 12mm¢ reference circle. Good for
general photography, especialy with long lenses.
Type C: Fine-ground matte field wth 4mm¢ clear spot and cross hair. For photomicrography, astrophotography
and other high-magnification applications, using parallax focusing on aerial images.
Type D: Overall fine-ground matte field Full specialized close up photography and for use with long lenses.
Type E: Matte/Fresnel field with 3mm¢ fine-ground matte spot, 12mm¢ reference circle, and etched horizontal
and vertical lines. Ideal for architectural photography.
Type G: Clear Fresnel field with extra-bright 12mm¢ microprism focusing spot for viewing and focusing in
poor light. Four models (Gl - G4) are available corresponding to specific focal length lenses. Depth of field
cannot be observed.
Type H: Clear Fresnel field with microprism focusing pattern over the entire screen area. Permits rapid focusing
on any part of the screen with optimum edge-to-edge brightness in poor light. Available in four models (H1 - H4)
corresponding to particular focal length lenses.
Type J: Matte/Fresnel field with central microprism focusing spot and 12mm¢ circle. Good for general
photography.
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