Type M – central 5 mm double cross hairs with marked horizontal and vertical scales.Permits focusing on horizontal or vertical subjects. Type L – Type A, but with rangefinder set at a 45° angle from lower left to upper right.Type J – central 4 mm microprism plus 12 mm etched circle.Intended for sports photography, but not popular because switching lenses might necessitate switching the screen too. Four versions (H1–H4) for use with specific focal length lenses. Type H – fullscreen extra-bright microprism also cannot assess depth of field.Not popular because switching lenses might necessitate switching the screen too. Four versions (G1–G4) for use with specific focal length lenses. Type G – central 12 mm extra-bright microprism without matte background (cannot assess depth of field).Called 'architectural screen' and excellent for 'Rule of Thirds' pictorialist compositions. Type E – Type B with a grid of 5 horizontal and 3 vertical lines. Best screen for use with long telephotos with small apertures. Very bright and useful for photo-microscopy, astrophotography, and parallax focusing method. Type C – central 4 mm clear spot with crosshair reticle.Useful for close ups and long telephotos. Type B – central 5 mm focusing spot plus 12 mm etched circle.Changeover to Type K occurred circa 1976. Type A – central 3 mm split image rangefinder plus 12 mm etched circle.
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