Pentax ETH-310 - Manual (Page 45)

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8. Specifications
Telescope
Magnification 30
X
Effective aperture 45 mm
Resolving power 3”
Field of view 1° 30’
Minimum focus distance 1.35 m
Stadia ratio 100
Stadia constant 0
Angle Measurement
Type
Incremental rotary encoder
Detection mode V. angle: Single
H. angle: Dual
Minimum Display (Selectable)
ETH-302 1”/5”
ETH-305 1”/5”
ETH-310 5”/10”
ETH-320 10”/20”
Accuracy (DIN18723, Standard deviation)
ETH-302 2”
ETH-305 5”
ETH-310 10”
ETH-320 20”
Vertical Angle Compensation
Method
Automatic compensation
Stadia Ratio 100
Stadia Constant 0
Display
Type
Dot matrix LCD/Two lines
Display panel Dual display