Sometimes, you want it all!

discontinued The Obsession 30" is huge. With more than twice the light gathering power of a 20", this is an instrument that will make you the star of the star party. We've redefined the term Large Aperture. We've developed the first 27 point mirror cell in the industry. Other innovations like our clever intermediate connecting ring that permits one person to attach the cage to the trusses with both feet on the ground, just goes to show how Obsession has always been the big Dob leader.

	30" Specifications: Metric info shown in italics Primary Mirror: 30" - 762 mm OMI 2 inch thick mirror 96% reflectivity Enhanced Aluminum Coating and Dielectric Overcoat (a supreme coating) Center marked for precise collimation plus Interferometry certification see Optics page for more info Secondary Mirror: 4.5" - 114 mm United Lens 98% reflectivity at 550 nm. Super enhanced Brilliant-Diamond non-fading multi-dielectric coating see Optics page for more info Focal Length: 135" (± 2") - 3430 mm (± 50 mm) Mirror Cell: 27-point Truss Pole: Length: 89" (± 2") - 225 cm (± 5 cm) Diameter: 1.5" - 38 mm Wall Thickness: 0.065" - 1.6 mm Upper Assembly: Diameter: 36" - 92 cm Height: 19" - 48 cm Weight: 20 lbs. - 9 kg Lower Assembly: (see diagram): A= 43" - 110 cm | B= 41" - 105 cm | C= 32" - 82 cm | D= 38" - 97 cm Mirror Box weight: (what you don't lift): 210 lbs - 96 kg Weight at Handles: (what you do lift at Wheelbarrow handles): 60 lbs - 28 kg Eyepiece Height at Zenith: (approximately) 11' - 335 cm COMPARISON 14 times the light gathering power of an 8 inch Schmidt-Cassegrain Obsession 30" Typical 8" Limiting stellar magnitude: 17.5 14.0 Rayleigh Resolution Limit: 0.20 arc seconds 0.68 arc seconds Contrast limit: (minimum diameter before a nebular object fades from view) 2.9 arc minutes 11.0 arc minutes

Mirror Options: see the Optics page for more info Obsessions are built with premium diffraction limited optics from Galaxy and OMI (Optical Mechanics Inc.). Only OMI supplies mirrors for our 30" Obsessions are also available without optics if you already have your mirrors. Call, fax, or email for price and delivery.

• 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 ($5,000 for 30").

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.