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| Safely waiting darkness (18" and 25" Obsession) | Water vapor from interior evaporates, passes through, droplets from the exterior run off. |
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| Safely waiting darkness (18" and 25" Obsession) | Water vapor from interior evaporates, passes through, droplets from the exterior run off. |
Effectively cover your Obsession both at star parties and in storage. This white, 400 denier, polyurethane coated nylon fabric will reflect the sun, resists dust and moisture and is long-lasting. Our cover allows positioning in the horizontal when not being used so that high winds won't knock them over. It has a draw cord at the bottom to give a snug fit around the bottom. A sturdy 1" nylon strap is provided to attach a weight to the top end, keeping the wind from standing the scope up or turning it into a cosmic weathervane. The water and dust resistant polyurethane inner coating rounds out a complete protection package for extended observing sessions in the bush. The cover exterior is sprayed with a water repellant to add further protection from the elements. This unique combination offers protection from the elements while still having breathability, a must when covering a wet, dewey telescope. The Newtonian cover comes with a storage bag and secondary mirror cover, both with draw pulls. Worth every penny in strength, longevity and protection. The AstroSystems cover is not intended for continuous outdoor exposure. To retain the maximum water repellency, it is recommended you respray the cover once a year with silicone water repellant. A 12 oz. aerosol can will spray a 18" N cover twice. Available at hardware or discount stores for under $5. We use the brand "Silicone Water-guard", brown can with orange top made by Atsco products.
| Ship Weight | ||
| Obsession 12.5" | $80 | 8 |
| Obsession 15" | $90 | 10 |
| Obsession 18" | $100 | 11 |
| Obsession 18" UC | $100 | 11 |
| Obsession 20" | $115 | 12 |
| Obsession 25" | $190 | 15 |
| Obsession 30" | $260 | 20 |
| Obsession 36" | $360 | 25 |
*New* Now supplied with a 110v float charger to allow continuous charging without fear of overcharge. Eliminates battery loss due to the batteries staying undercharged for long periods of time.
The Cooling Fan Power Supply can be used with any 12V dc cooling fan(s). The power control will operate the fan(s) with an on/off switch, charge the batteries with either 110V ac (household) or 12 V dc (auto) and indicate that the batteries are charging with an LED indicator. Complete with control panel and battery mounting hardware. The system uses two 6V batteries wired in series to obtain 12V. The 3 amp hour batteries have plenty of capacity to operate 2 fans for 2-3 days before recharging. A higher capacity 7 Ahr battery is available for more than 2 fans or to supply other devices such as digital setting circles, dew removal or illuminated finders. It is recommended that the total power needs in amps be 25%-50% of the battery rating.
Battery dimensions:
1.3 Ahr 2" tall, 5.25" wide and 1.3" thick 11 oz. each battery (fits 12.5" - 15")
3 Ahr 2.5" tall, 5.25" wide and 1.3" thick 1.5 pounds each battery (fits 15" - 25")
7 Ahr 4" tall, 6.0" wide and 1.3" thick 2.9 pounds each battery (fits 18" - 30")
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| Parts Included | |
| Control Plate with Electronics | 1 |
| Control Plate Screws | 4 |
| Battery Jumper Wire | 1 |
| Gel Cell Batteries | 2 |
| Auto Charger | 1 |
| AC Charger (float) | 1 |
| Wire Ties (battery mount) | 4 |
| Wire Connectors | 2 |
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The new Flash 4 Sky Commander transforms your telescope into an efficient observing tool. Locate and identify objects within seconds, even in light polluted skies. Spend valuable observing hours at the eyepiece instead of hunting objects. "Zero-in" the telescope to celestial objects. Just move the scope until the "difference reading" of the object you selected is zero. It's just that easy! Identify unknown objects in a real time search and identify mode. Any object within 0.5 degrees is identified and displayed instantly. Other features include 32 character super twist LCD information display with backlight dimmer control, battery monitor, magnitude filter. Best of all, the Flash 4 uses the simple, time tested two star alignment. The Sky Commander has an extensive 15,000 object data base upgradeable to 30,000, including NGC, Messier, UGC, IC, planets and 60 programmable objects. Complete with computer, 10,000 step encoders, custom made cables and truss telescope mounting hardware, (drilled azimuth pivot is required).
The Flash 4 Sky Commander is supplied with a computer interface cable for free downloads from the Sky Comm web site.
| Catalog Size | 15,000, upgradeable to 30,000+ |
| Processor | 8 bit 68HC11 |
| User Catalog | Yes |
| Display | 32 character LCD, yellow Green |
| Display Brightness Settings | 3 |
| Display | RA/DEC or ALT/AZ |
| Display Resolution | 0.1 deg, upgradeable to 0.01 deg. |
| Display Heater | Yes |
| Sidereal Timer | Yes |
| Encoder Resolution | 10,000, upgradeabe to 32,767 |
| Encoder Test Mode | Yes (in upgrade) |
| Encoder Mode Display | Yes, (via RS-232) |
| Encoder Sample Rate | 2000/sec. (moving) 1000/sec. (stationary) |
| Search Mode, Magnitude | Yes |
| Search Mode, Constellation | Yes |
| Search Mode, Radius | Yes, 0.5 degree |
| Catalog by Name | Yes, Double Stars |
| Planet Position | Yes, better that 0.1 arc minute |
| Equatorial Platform Compatible | Yes |
| Platform Two Star Align | Yes |
| Polar EQ Mode | Yes |
| Realign on Object | Yes |
| Serial Support | Yes |
| ServoCat Support | Yes |
| Sky Tracker Support | Yes |
| Weight | 8 oz |
| Battery Monitor | Yes |
| Power | 9V gives ~40 hours operation |
| ShipWeight | |||
| Complete Set | Flash 4 computer, 10K encoders, cable set, serial interface cable, mounting hardware set 2 | $525.00 | 4 lbs. |
| Flash 4 Computer | Computer only | $295.00 | 1 lb. |
| Encoders | 10,000 step with low profile phone plug module | $80.00 | 1/2 lb. |
| Cable Set | specify cable lengths or telescope size (up to 22") | $30.00 | 1 lb. |
| Cable Set | specify cable lengths or telescope size (24" to 36") | $45.00 | 2 lbs. |
| Hardware Set 2 | Telescopes with exterior mount blocks (Obsession, Starsplitter, at right above) | $95.00 | 2 lbs. |
| Mirror Box Mount | Baltic Birch Mirror Box Mount with Hardware | $25.00 | 1 lb. |
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This 210 denier sealed nylon case will protect your upper cage while the telescope is being stored or transported. They feature a drawstring and cord lock.
| Obsession Scope Size | Width (inside) | Length (inside) | |||
| 12.5" - 14.5" Telescope | $32.00 | ShipWeight 1 lb. | 31 | 29 | |
| 15" - 16" Telescope | $37.00 | ShipWeight 2 lbs. | 34 | 32 | |
| 18" Telescope | $40.00 | ShipWeight 2 lbs. | 40 | 32 | |
| 20" - 22" Telescope | $42.00 | ShipWeight 2 lbs. | 44 | 37 | |
| 24" - 25" Telescope | $52.00 | ShipWeight 2 lbs. | 50 | 44 | |
| 30" - 32" Telescope | $62.00 | ShipWeight 3 lbs. | 62 | 52 |
| Obsession Scope Size | Cage Case |
| 12.5" Classic | 12.5-14.5 |
| 15" Classic | 16 |
| 18" Classic | 18 |
| 20" Classic | 20-22 |
| 20" Classic f/4 | 20-22 |
| 25" Classic | 24-25 |
| 25" Classic f/4 | 24-25 |
| 30" Classic | 30-32 |
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This heavy duty nylon case protects your truss poles when traveling or storage. Shoulder strap is included. Sized to hold trusses up to 2.5" (total) diameter to accommodate foam covered trusses.
| A - up to 40" trusses | $37.00 | Shipweight 2 lbs. |
| B - up to 50" trusses | $42.00 | Shipweight 2 lbs. |
| C - up to 60" trusses | $47.00 | Shipweight 3 lbs. |
| D - up to 72" trusses | $52.00 | Shipweight 4 lbs. |
| E - up to 96" trusses | $65.00 | Shipweight 4 lbs. |
| Obsession Scope Size | Truss Length | Truss Case Size |
| 12.5" Classic | 41 | A |
| 15" Classic | 45 | B |
| 15" Ultra Compact | 48 | B |
| 18" Classic | 55 | C |
| 18" Ultra Compact | 55 | C |
| 20" Classic | 70 | D |
| 20" Classic f/4 | 55 | C |
| 22" Ultra Compact | 70 | D |
| 25" Classic | 87 | E |
| 25" Classic f/4 | 70 | D |