           
Free Obsession DVD product Video
To obtain a hard copy of Obsession literature including our 120 minute product video, e-mail your POSTAL address, or fill out this form and we'll mail it to you at no charge (World-wide).
The video is great for determining which aperture is best for you.
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Stacey Greenhill from Wheeling Illinois and Dave Kriege. Stacey's new 18" UC in foreground and Dave's twenty year old 25" Classic in background. Observing from the House of Obsession, Dave's observatory.
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13mm Ethos eyepiece by Televue.
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This amazing lens has a 100 degree apparent field of view. You might have to turn your head to see from one side to the other as your eyeball can't move that far!
Email for price and delivery info.
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Obsession 18 f/4.2 UC
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Introducing an entirely new telescope. The Obsession 18" f/4.2 UC (Ultra Compact) telescope is for people that want a large aperture telescope that will fit in nearly any car. That's right, this 18 inch telescope fits in the trunk of even subcompacts! Completely new design and extremely compact - but same optical, build quality, price, and ease of use as the Classic 18 inch Obsession. Introduced at the Texas Star Party last May, we are already sold out for 2007. For more info please call or email. More photos and full product info will be posted here on our web site soon.
Cloudy Nights Review
more info
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NEW BInocular Photon Machine
(BIPH) by Night Vision Astronomy
Russ Lederman and Doug Baum have worked together to bring this project to completion and are now offering production models for sale.
This is an excellent accessory to any Obsession Telescope.
If you are interested in the BIPH, and would like to discuss the product further, please contact Doug at 646-772-4138 or you may send an email: doug@nightvisionastronomy.com
http://www.nightvisionastronomy.com
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Now available.
Custom Obsession Telescopes decals for your trailer or vehicle.
Black graphic on white background with a thin black / white border, and includes your scope aperture in the lower right corner. Or get one without the scope aperture.
More info . . .
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OMI - Optical Mechanics Inc.
OMI is expanding with 12 new spindles to increase capacity including two new polishing machines dedicated to our 30 inch mirrors. With new equipment delivery times will be even shorter!
ARGO NAVIS DSC installation
We now fabricate our own steel mounting hardware and cables for the 10K res encoders. When you buy the Argo Navis Digital Setting Circles with your Obsession you get quality factory installation. Encoder arms are easily removed with brass thumb screws. No tools required.
To keep up with orders in 2005, we pre-purchased 200 premium large aperture optics from Galaxy and OMI as well as 200 Brilliant Diamond secondary mirrors from United Lens. All with the highest specs and reflecitivity on the market. Interferometry certification included. (Others provide dreamed up test data or no documentation at all) In fact Torus and Galaxy are so confident of their quality that they post the serial number, test data and interferograms for every mirror they make on the internet. Nobody else does this!
Obsession Telescopes along with Galaxy and OMI-Torus try very hard to produce only finest large aperture instruments. We are obsessed with the best. We have the best optics, the fastest delivery, the highest reflectivity coatings (96% on primary & 98% on secondary), the most advanced digital setting circles in the world, the coolest GoTo tracking system, and of course the highest quality large aperture Dob built in America. With an Obsession Telescope you'll have a lifetime of observing enjoyment.
NEW SUPER RES 10K COUNT ENCODERS
Now when you choose the Argo Navis™ Digital Setting Circles or ServoCAT GoTo options you get super res 10000 count encoders. Standard on all Obsessions, these 10K encoders increase targeting accuracy. Others still use the lower res 8192 or 4000 count encoders.
POWERED GROUND BOARD NOW INCLUDED
The Power Ground Board (PGB) option is now included with all ServoCAT orders at no extra charge. The PGB prevents power cord wrap up as the scope is moved around the sky. No more hassles moving your power scource.
NEW 12.5 f/5 OBSESSION
We are argain taking orders for the new 12.5" f/5 Obsession. Same design and quality. Premium optics from Torus. Small enough to fit in any car. Crisp f/5 images, no coma corrector needed. Full thickness primary mirror. Enhanced coatings. Curved spider so no diffraction spikes. Now everyone can have best!.
NEW ARGO NAVIS™ DIGITAL SETTING CIRCLES
Available now. We can install the awesome "Argo Navis digital setting circles" on your scope. The Argo has been updated with more features, more catalogs, and a smaller box with it's own holster. The Argo Navis brings not only accurate positioning information to your telescope but also provides an enormous detailed database of tens of thousands of celestial objects. Stars, asterisms, galaxies, globular clusters, open clusters, planetary nebula, nebula, planets, asteroids, comets, earth-orbiting satellites and more. Features so advanced we can't describe them all on this page. For more info please click to the links above.
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SERVOCAT GOTO TRACKING DRIVE FOR OBSESSION
Available now. We can install the new Generation 2 "ServoCAT GoTo tracking drive" on your Obsession telescope. Combined with the most advanced "Argo Navis digital setting circles" this system makes your large aperture telescope a fantastic observational instrument. Seamless operation. Precise tracking and GoTo capability at the push of a button to over 29000 objects. Features so advanced we can't describe them all on this page. For more info please click to the links above.
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THE BEST MIRRORS
Obsessions are built with premium diffraction limited optics from Galaxy, and OMI Torus.
To keep up with orders for 2005, we have pre-purchased 200 premium large aperture optics from Galaxy and OMI-Torus as well as 200 Brilliant Diamond secondary mirrors. All with the highest specs and reflecitivity on the market. Interferometry certification included. (No dreamed up test data like some others) In fact OMI Torus is so confident of their quality that they post the serial number, test data and interferograms for every mirror they make on the internet. Nobody else does this! Galaxy Optics and OMI Torus Pro-spec research grade mirrors are tested and certified with laser interferometry to be 1/4 wave or better Peak to Valley ACROSS THE FULL FACE OF THE MIRROR! There is no other way to meet this strict criterion without interferometry. Other opticians may claim their mirrors are 1/10 wave, 1/20 wave etc but don't believe it. Such claims are unsubstaniated and their mirrors often fail when analyzed by interferometry with astigmatism the most common error. There is no better way to test and figure a large aperture mirror than with interferometry. Other opticians measure the figure on the mirror using the Foucault test (there's nothing wrong with this). However this test measures only spherical aberration. From the data acquired in this test you can calculate a P-V wavefront error for spherical aberration only. However they often "infer" the P-V, RMS and Strehl values, as if they had measured the entire mirror and are able to report on all of the other aberrations. The RMS and Strehl values that they report are not valid because they are not collecting the data needed to calculate them. RMS and Strehl are the most important values to the customer, and rightly so. They tell you much more about mirror quality than the simple P-V measurement. Reporting bogus RMS and Strehl data is unscientific and useless. That's why we offer premium mirrors from Galaxy and OMI Torus. With a Galaxy or OMI Torus mirror you can be assured the P-V, RMS and Strehl data are accurate and real because they use interferometry in addition to the Foucault test.
Shown below are Foucalt and Ronchigrams for a 15" f/4.5 mirorr made by OMI-Torus Optical. Notice the exceptional smoothness and lack of ripple. Fully corrected figure all the way to the egde. In addition, we use only 2" thick glass so no bendy astigmatic thin mirrors like others may use. Call, fax, or email for price & delivery
Customer: Sue French • Peak to Valley: .093 • RMS: .017 • Strehl: .988 • F: 68" |
FAST DELIVERY
Because we purchase Galaxy and Torus mirrors in advance, delivery times are often less than a month to you! Each mirror is delivered with an interferometric certification that conforms to the industry standards for research-grade astronomical mirrors. No other telescope company comes even close to Obsession for quality, interferometry certification, and delivery. Primary coatings are 96% enhanced aluminum which are more durable and more reflective than standard 88% aluminum. Now you can have the best mirrors, the best coatings, and best delivery in the business!!!!! Call, fax, or email for price & delivery.
For complete optical specs please see:
Galaxy Optics mirror specs (optics)
OMI Torus mirror specs (optics)
NEW SECONDARY MIRROR & COATING
The secondary mirror is half the optical system. At Obsession we use only the finest optical flats. Precision beveled and free of chipped edges, each Pyrex secondary mirror is guaranteed to be 1/10 wave or better and is certified with interferometry. That's right. Inteferogram with Peak to Valley wave front with every secondary mirror.
Two dozen 3.1 inch flats with 98% reflectivity Brilliant Diamond exiting the coating chamber.
An Obsession exclusive -- Super enhanced Brilliant-Diamond is standard on all Obsession secondary mirrors. This premium nonfading multidielectric coating has 98% reflectivity at 550 nm. The ultimate coating for the deep sky obsessed. This coating is standard on all Obsession secondarys at no extra charge. No one else offers this kind of quality--it's like getting an extra inch of aperture for free! With Obsession you get the best reflectivity on the market. Brilliant-Diamond coatings and precision flats from United Lens are just two of the reasons Obsessions out perform all others. Our competition likes to compromise here to save money. Ask them where do they get their secondary mirrors. Ask them are they are tested and certified with interferometry. Ask them if they have a dielectric fade resistant 98% coating.
NEW 5-COAT FINISH
Obsessions get a gorgeous 5 coat polyurethane finish that is sanded between coatings and professionaly applied with HVLP spray unit: not a crude brush job like some others
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STEEL WHEELBARROW HANDLES
Standard on all Obsessions 15" thru 30" at no extra charge. They're warp proof, stronger and lighter than wood handles and have 10" pneumatic tires. The mirror box, primary mirror, rocker and ground board are transported as a single unit. It is quickly and easily rolled about with the wheelbarrow handles. The wheels carry the weight-not you. No need to lift anything. No heavy mirror cell with delicate primary to lug out and hassle with. No mirror box and rocker to carry around. Why struggle lifting heavy components when you can comfortably roll out everything all together on air filled wheels. Set up is fast and easy so you can enjoy astronomy instead of a workout!
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INDUSTRIAL CONSTRUCTION
Ever wonder why there are no ugly nail or screw holes on Obsessions? The corner joints on our mirror boxes, rocker bottoms and sides are fully braced, glued and NC machine doweled every 2 1/2 inches (64 mm) for incredible strength. That's right, doweled. Cheap Dobs use nails or screws. In addition, Obsessions are constructed with a full Baltic Birch light baffle at the top edge of the mirror box to maximize image contrast and to increase the strength of the box. Others place the baffle (if any) inside the box close to the primary where is does little to no baffling and also leaves the top of the box wide open and unsupported. The result is a weak flexible mirror box and washed out images. No one builds Dobs as strong or as good as we do.
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APPLE PLY CONSTRUCTION
No extra charge for the best. Why Appleply? see Why Buy an Obsession for details. The ultimate plywood that simply blows everything else away. (It's $90 per sheet!)
BRASS ENGRAVING
In addition to our standard cast brass plate (with serial #, date, model, and your name) we now include an elegant computer engraved brass emblem. Mounted by the focuser, it looks great.
IMAGING
Interested in doing CCD or film imaging? How about live video for schools or your friends. Modern CCD and video cameras are so sensitive you can now do things that were in the realm of big observatories only a few years ago. This shot of M76 was taken by Doug Askew with a CCD camera on an Obsession 18. With a large aperture Obsession telescope on an Equatorial Platform you can go deeper than ever with very short exposures. No field rotation on an Equatorial Platform.
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CUSTOM NYLON STUFF SACK
Attractive and functional, every sack is sized properly to store and protect your light shroud. Cord lock closure and monogramed with Obsession aperture.
Also, Obsession light shrouds are made from 100% ripstop nylon tent fabric--not cheap cotton T shirt fabric like most others.
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