DAS Activities

DAS Public Nights

Public Nights
Tuesday and Thursday at
DU's Historic Chamberlin Observatory
Current start time is 7:30 pm
Costs to the public are:
$4.00 adults, $3.00 children

To book, please click:

Public Night

The “D Files”

For many years, the “D Files” was a semi-regular column in the DAS newsletter, The Denver Observer. Members of our society submitted articles about their scopes and/or equipment. The equipment that they wrote about did not have to be completely home-built. The articles could be reviews, experiences, or modifications of equipment that was store-bought.

Many of these original articles are made available below.

The original D-Files will be augmented with recent articles from the Observer on astronomical observing techniques and lore, equipment, and ATM projects, as well as technical articles contributed by DAS members.
Some of these articles are PDF documents. You will need the free PDF reader to download them. If you need a PDF reader, click the link below:

Available Articles

Clifford A. Brown

Chuck Carlson

Darrell Dodge

Jack Eastman

Edgar Everhart


Tim Geoghegan

Ron Mickle


Ron Pearson

David Shouldice

Dave Trott’s Web Site

The following articles are no longer available online.

If you have a copy, please send it to the Webmaster.
Terry Chatterton’s SCT modifications

Bert Harless’ reflector modifications

Bert Harless’ reflector modifications, part 2

Dale Keller’s Amateur Telescope Making Site

BinoQuest, an Epic Optics Adventure, by Pat Ryan (PDF)