Thinking About a New Scope? Think Big!


920-648-2328

Atlas

Made in the USA

Telescopes


15" f/4.5$4,895

Plus Shipping & Crating


Medium Aperture, keep your feet on the ground!

Now everyone can own a piece of the dream.

The Obsession 15 has the same quality and award winning design as our other telescopes at a really great price.

Four times the light gathering power of an 8 inch scope so you get much bigger and brighter images.

With an Obsession 15 you can really see the universe.

Easy to set up and use, the eyepiece height is always less than 5 1/2 feet off the ground. Most observers won't even need to use a ladder!

Wheelbarrow handles included at no extra charge.


4 times the light gathering power of an 8 inch Schmidt-Cassegrain Obsession
15"
Typical
8"
Limiting stellar magnitude: 15.5 14.0
Rayleigh Resolution Limit: 0.36
arc seconds
0.68
arc seconds
Contrast limit:
(minimum diameter before a
nebular object fades from view)
5.7
arc minutes
11.0
arc minutes

Customer Comments

Bill L., 15" owner in Brea, California

Received my 15" scope last week, all was in good order. Took it out for first light last Sunday night and Monday night. I saw some great cosmological views, including Seyfert's sextet in Serpens Cauda. The core of M 13 resolved almost to the center. Same for M22, M55, M5, and M92. The Video on collimating and other tips came in really handy. Everyone loves the ease of operation and no need for a ladder. I would like to say that I am totally Obsessed! I would like to congratulate your company for a great instrument! The OMI optics are supperb.

Ron O., 15" owner in Erie, Pennsylvania

Hello Dave: Thank you for a magnificent instrument. My first night out was fantastic. I never knew what detail could be captured in a quality 15" system vs. my old 8" LX200. I am permanently hooked on my Obsession. Folks who were with me felt that the optics on my 15 were superior to other 18's on site.

John A. 15" owner in Surrey England

Suffice to say, on the occasions when I have managed to coincide with reasonable viewing I have been gobsmacked by what I can see. I remember thinking after my first sight of M13, "I can now die a happy man" - mindblowing! Thanks again for a wonderful telescope all the best!

Read more 15" customer comments

M108

M108 CCD image by Doug Askew

Helix Nebulae

Helix Nebulae by Pierre Schmidt and Eduard von Bergen in Austria

NGC 2903

NGC 2903 CCD image by Doug Askew

M27

M27, the Dumbell Nebulae in Vulpecula by Pierre Schmidt and Eduard von Bergenin in Austria

M51

M51 CCD image by Doug Askew

Abell 1367

Abell 1367 CCD image by Doug Askew

M13

M13 CCD image by Doug Askew

M27

M27 CCD image by Doug Askew


return to top

15" Specifications:

Metric info shown in italics


Primary Mirror:

  • 15" - 381 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:

  • 2.6" - 66 mm United Lens 1/10 wave or better
  • Interferogram included
  • 96% reflectivity at 550 nm
  • Super enhanced Brilliant-Diamond non-fading multi-dielectric coating

see Optics page for more info


Focal Length:

  • 68" (± 2") - 1727 mm (± 50 mm)

Eyepiece Height at Zenith:

  • (approximately) 66" - 167 cm

Mirror Cell:

  • 9-point

Truss Pole:

  • Length: 45" (± 2") - 114 cm (± 5 cm)
  • Diameter: 1.25" - 32 mm
  • Wall Thickness: 0.035" - 0.9 mm

Upper Assembly:

  • Diameter: 19" - 48 cm
  • Height: 10" - 25 cm
  • Weight: 8 lbs. - 3.6 kg

Lower Assembly:

  • A= 25" - 63 cm | B= 23" - 58 cm | C= 19" - 48 cm | D= 21" - 53 cm

see diagram


Mirror Box weight:

  • The heaviest component (what you don't lift): 60 lbs - 27 kg
  • Weight at Handles: (what you lift at Wheelbarrow handles): 9 lbs - 4 kg

return to top

Mirror Options:

Obsessions are built with premium diffraction limited optics from Galaxy and OMI (Optical Mechanics Inc.). See Optics page for more info.

Only OMI supplies mirrors for our 15".

Interferometry certification included on all mirrors, both primary and secondary. Ion deposition 96% enhanced coatings standard on all mirrors.

return to top

Standard Features and Accessories:


Choose from four great focusers

The JMI EV3 comes standard on all Classic Obsessions. Or upgrade to the EV1, or EV1 with motofocus, or the awesome Feathertouch by Starlight Instruments. See the Focuser Options page for more information.

JMI EV3

JMI EV3 (standard on all Classics)


JMI EV1 with motofocus

JMI EV1 with motofocus

JMI EV1

JMI EV1


Feathertouch by Starlight Instruments

Feathertouch
by Starlight Instruments


Wheelbarrow handles

Comes standard on all Obsessions 12.5" through 25" at no extra charge.


Primary Mirror Coating

Enhanced Aluminum - 96% reflectivity, with dielectric overcoat (a supreme coating) standard on all primary mirrors. See Optics page for more info.


Secondary Mirror Coating

An Obsession exclusive - Super enhanced Brilliant-Diamond is standard on all Obsession secondary mirrors. This premium multi-dielectric coating has 96% 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 96% 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


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.


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


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

return to top

Ordering Information:

A Deposit is required to place an order ($1,600 for 15" Classic)

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.