gptkbp:notableFeature
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gptkb:DA-1_action_finder
gptkb:DE-1_plain_prism
gptkb:DW-1,_DW-2_waist-level_finders
gptkb:F2_High_Speed_(10_fps)_variant
gptkb:F2_Medical_variant
gptkb:F2_Photomic_(with_metered_prism)
gptkb:F2_Titan_special_edition
highly collectible
used by NASA
various special editions
interchangeable focusing screens
modular system
used in Vietnam War
DP-1, DP-2, DP-3, DP-11, DP-12 finders
F2 Data back option
F2S, F2SB, F2A, F2AS variants
Photomic metered prisms available
interchangeable viewfinders
mechanical reliability
no built-in light meter (standard prism)
professional durability
titanium shutter curtains (early models)
various focusing screens (Type A, B, C, etc.)
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