Digitarium® Alpha 2 Portable Digital Planetarium System
This model has been discontinued. Please see our current models.
See also Digitarium general specifications.
|Maximum Dome Diameter
||Approximately 33 feet/10 meters. Brightness
is the main
issue, since the larger the dome,
the larger the surface area the light from the projector must cover.
||768 pixels across a diameter
|Field of view
||180 degrees, full sky.
|Pixels per degree of sky
|Angle of Projection
|Base Projector Brightness
||3500 Lumens with non-fisheye lens (Provided for comparison purposes with other systems. Actual brightness with a fisheye lens is significantly less due to not projecting the whole video rectangle and differing lens properties. Please contact us if you may be interested in a brighter system.)
||Approximately 900:1 (Actual measured value with fisheye lens and projector in normal contrast mode.)
||Up to 1500 hours on high/2000 hours on low (4000 hours with dimmer long life lamp)
||Some violet color separation is present, however we do not believe that this will distract from your teaching. This is a tradeoff in the interest of an affordable system and has been
improved from the previous model.
||1 TB standard.|
North America: 120VAC, 50/60Hz, 640 Watts
Elsewhere: Contact your local distributor.
||FCC Class A, CE class A (RoHS compliant)|
||Direct power off (fan properly cools down lamp even if the power is cut off), dust filter, sealed optical block, shutter, LAN control and reporting
System: 16 x 16 x 24 inches for storage (40 x 40 x 60 cm),
16 x 16 x 34 inches for use (40 x 40 x 87 cm)
Transit case: 19 x 21 x 31 inches (47.5 x 52.5 x 77.5 cm)
System: 58 pounds (26.4 Kg)
Transit case: 34 pounds (15.5 Kg)
Total: 92 pounds (41.8 Kg)
The transit case has built in wheels and extendable handle for easy transport on flat surfaces.
Product photos may differ slightly from actual models.
[Our Zeiss starball] projector itself was great but we could not find any 'good' new shows for this format (slides). I told my boss it was like having a perfectly running car that required leaded gas to run. It works fine but no fuel available... Thankfully our entire group decided... to move into the digital age.
— Jim Duke, Henderson State University, Arkadelphia, AR