35
Version 1.5 rev 26 Sep
2016
Apogee Astronomy
Alta and Ascent Manual
8.2 Alta – General Specifications
PC Interface
USB 2.0
Digital Resolution
16-bit to 8 MHz
Exposure Time
20 milliseconds to 95 minutes
(2.56 microsecond increments)
Image Sequencing
1 to 65535 image sequences under software control
Frame Sizes
Full frame, subframe
Cooling (typical)
Thermoelectric cooler with forced air.
Maximum cooling up to 50°C below ambient temperature*
Temperature
Stability
+/- 0.1
o
C
Operating
Environment
0 to 40
o
C. Relative humidity: <70% non-condensing.
Recommended
storage conditions
-25 to 50
o
C. Relative humidity: <70% non-condensing.
Power
75W maximum power with shutter open and maximum cooling. AC/DC “brick” supply with int’l
AC input plug (100-240V, 50-60Hz). Alternate 12V input from user’s source.
Overvoltage
Category
CAT II. An overvoltage category of CAT II means that the equipment is designed to cope with
transient voltages above the rated supply that would be experienced by any product
connected to a mains socket in a building.
Rated Pollution
Pollution Degree 2. Normally only non-conductive pollution occurs. Occasionally, however, a
temporary conductivity caused by condensation must be expected.
Remote Triggering
LVTTL input allows exposure to start within 25 microseconds of rising edge of trigger.
Camera Head Size
Refer to Mechanical Specifications
Back Focal
Distance
Refer to specifications sheet.
Mounting
5.125” bolt circle. 2.5” 24 TPI thread.
Optional Nikon F-mount or Canon EOS/EF or FD mount.
OS Support
Windows, Linux
*
Ambient temperature 25°C
