Product Overview

Digitarium Delta 4

The Digitarium Delta 4 is our entry level planetarium system, designed to be easy to transport, set up, and teach with. It projects high contrast 1080 pixel diameter imagery over a full dome with no blind spots or cut-outs. It is the culmination of years of development effort, with our own innovative proprietary lens design.

The Digitarium Delta 4 offers not just a compact size but quick set up, intuitive user interfaces, high resolution, excellent projection quality, and wealth of other features. Digitalis sells inflatable domes in several diameters for a complete portable solution.


See also Digitarium general specifications.

Maximum Dome Diameter
Approximately 24 feet/7 meters.
Brightness is the main issue, since the larger the dome, the larger the surface area the light from the projector must cover.
Pixel Diameter 1080
Projected Resolution 0.92 megapixels
Field of View 180 degrees, full sky.
Pixels per Degree of Sky
6 average
Angle of Projection
~175 degrees
Base Projector Brightness
4500 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 see any of our other models if you need a brighter system.)
Contrast Ratio
Nominal projector contrast is 6,000:1.
Lamp life
Up to 3,000 hours on high, 5,000 hours in eco mode.
Control Unit
Digitarium CU-Z
User Interfaces Included
Audio Output
Stereo with external user supplied speakers.
Software Nightshade NG Basic
100-240VAC, 50-60Hz, 450W
FCC Class A, CE class A, RoHS compliant

The rugged transit case has built in wheels and an extendable handle for easy transport on flat surfaces.

Purchasing Information

US system price: $16,370

Please use our purchase page for ordering instructions. Outside the US contact a local dealer for pricing.


Purchase price includes:

  • One Digitarium Delta 4 planetarium system with set of two Digitarium remote controls (one spare)
  • Wheeled transit case
  • Heavy duty surge suppressor with 25-foot cord (120 VAC countries only)
  • DLP projector remote control.
  • Wireless gamepad control.
  • Comprehensive and easy to use set of user manuals.
  • Set of lesson plans for use with elementary through high school students.
  • Complete set of PASS Curricula for Digitarium Systems. Includes Augmented Lessons ideal for use with our Universal Console interface.
  • 1000 GB portable hard drive with companion media for lesson plans, over 3 GB of royalty-free music, and a number of fulldome video shows:
    • Citizen Sky - Epsilon Aurigae - binary systems
    • Cosmic Castaways - explore galaxies and their stars
    • Back to the Moon for Good - Google Lunar XPRIZE competitors try to land a spacecraft on the Moon
    • Dark - dark matter and cosmology
    • Flight Adventures - the science of flight (free for US customers only)
    • FLIGHT TO THE MOON: LRO and LCROSS Revisited
    • IBEX: Search for the Edge of the Solar System
    • Journey to the Centre of the Milky Way
    • Losing the Dark - light pollution
    • New Horizons for a Little Planet - Pluto and the New Horizons mission
    • Solar Quest - how the Sun and the Earth are interconnected
    • Sunstruck - the Sun's influence on the Earth
    • Two Small Pieces of Glass - history of the telescope
    • Various short fulldome animations

    (Show licensing agreements must be signed and returned before system ships to receive hard drive.)

  • Three year limited warranty (Three year limited warranty on the projection component from NEC.)
  • Free technical support and automated software updates for the life of your system.
  • Lens cleaning kit.
  • Free membership in our Digitarium users community website.
  • Prepaid calendar-year individual membership in the International Planetarium Society.

Please note: these prices do not include a dome, a necessary requirement for system use. Purchase a Digitalis dome with your system and receive a $1,000 package discount.

remote control

Additional Information