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Mars photo taken 10/2/05 by Glenn Schaeffer with 20" Obsession @ f/10 with Toucam Pro II.
Big scope Smack Down!
Howard B, 20 inch owner in Forest Grove, Oregon says "My nearly 11 year old 20" had an adventure last Friday that I thought you'd like to know about." read more >
Paul on Kauai with his 20" Obsession
Johan Van Dorp in Sultanate of Oman says, "You see the Ras Al Hamra astronomical society is putting the 20" to good use! It's really a fantastic instrument and a breeze to use". Eastern Hajar dark site on Selmah Plateau, near the Ibra Toumbs (these toumbs are 4000 years old).
Rose Stein on her wedding day passing under 20 inch Obsession arch. Rose and Jeff Stein are obsessed deep sky observers.
Robert D. having first light with 20" at Glacier Point, Yosemite National Park.
New scope and first light at Astrofest. Security officer Dave M. with his 20".
Infra-red photo of star guide and 20" Obsession at a public Star Walk at Copper Breaks State Park near Quanah, Texas. These public astronomy programs are held in cooperation with the Texas State Park system and feature half a dozen Obsession telescopes ranging in aperture from 15 to 30 inchs. Photo taken by Fred Koch.
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Home > Telescopes > 20" Obsession
The Universe has just come into view!
The ultimate large aperture value
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Orders received after July 1st - price will be $6.895
This is truly big aperture.
Thousands of deep sky objects will tempt you. In fact, nearly everything in Uranometria 2000 is within your grasp!
The Obsession 20" is the scope that in 1989 revolutionized the Dobsonian.
Our user friendly design, craftsmanship second to none, one person set up and super smooth operation have since made Obsession the standard by which all other Dobsonians are compared.
The 20" is the ultimate blend of cost, ease of use, and visual impact. If you want an instrument that will provide you with a lifetime of celestial enjoyment, the Obsession 20 is it. It's simply the telescope of choice for deep sky enthusiasts.
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Dennis Dickerson with 20" and ServoCAT GoTo drive at Copper Breaks State Park near Quanah Texas getting ready for "Star Walk" public viewing night.
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Dick Latt with 20". Dick used his Argo Navis to down load and find the current comets at Okie Tex 2004.
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A cold night in Moscow. Mark Leonard with his 20".
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| see more 20" user photos |
Mirror Options:
see the Optics page for more info
Obsessions are built with premium diffraction limited optics from Galaxy and OMI (Optical Mechanics Inc.).
Choose from Galaxy or OMI mirrors when ordering.
Obsessions are also available without optics if you already have your mirrors. Call, fax, or email for price and delivery.
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Standard Options and Accessories
- Choose from four great focusers
The JMI EV3 comes standard on all Obsessions. Or upgrade to the EV1, or EV1 with motofocus, or the awesome Feathertouch by Starlight Instruments. See the Focuser Options page for more focuser options
- Wheel Barrow handles
Comes standard on all Obsessions 15" through 30" at no extra charge.
They're not necessary on the 12.5".
- Primary Mirror Coating
Enhanced Aluminum - 96% reflectivity, with dielectric overcoat (a supreme coating) standard on all primary mirrors.
- Secondary Mirror Coating
An Obsession exclusive - Super enhanced Brilliant-Diamond is standard on all Obsession secondary mirrors. This premium multi-dielectric coating has 98% reflectivity at 550 nm. The ultimate coating for the deep sky obsessed. This coating is standard on all Obsession secondaries at no extra charge. Brilliant-Diamond is just one of the reasons Obsessions out perform all others.
With 96% enhanced on the primary and our standard 98% Brilliant Diamond secondary, the optical system is equivalent to an extra 2" of aperture!
Optional Accessories:
See the Accessories page for more info on these items
- Telrad
- Ripstop Nylon light shroud.
- Barlow-Laser Collimator 2" barrel. Highly recommended. Includes 2" magnetic barlow lens and mask for the new barlowed laser collimating technique. Great visual aid and no better way to accurately align fast Newtonians. learn how
- Argo Navis digital setting circles with super res 10K encoders. more info
- ServoCAT Goto Drive System. more info
- Counterweight kit - (you supply the lead shot or sand) Recommended if you intend to use heavy barlow/eyepiece combinations, a Paracorr coma corrector, a traditional finderscope, or the Argo Navis digital setting circles.
- Dew heater for secondary mirror - Secondary mirror heating system automatically senses the air temperature and the mirror temperature, then maintains the secondary at a preset (adjustable) temperature above the ambient air temperature to prevent dewing or icing. more info
Ordering Information:
A Deposit is required to place an order ($2,000 for 20").
Mail the deposit to:
Obsession Telescopes
PO Box 804
Lake Mills, WI 53551
USA
You can e-mail your order, or mail it with the deposit.
- With your order, please list any options and/or accessories you want, your mailing address, e-mail address if any, and phone number(s).
- After we receive it, we will send you an order confirmation letter.
- Delivery is usually 1 to 2 months from time of order.
- Please e-mail for current delivery times.
- Balance due prior to shipment.
- Prices do not include shipping and crating. We ship throughout the world via UPS.
- Any questions, please call or e-mail.
- NOTE 10% order cancelation charge.
Need more information?
E-mail your postal address and we'll send you the Obsession brochure and video at no charge.
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