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Celestron - CPC 925XLT with STARBRIGHT XLT Coatings
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$ 2499.00
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Click here for recommended accessories |
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Celestron’s CPC Series with revolutionary SkyAlign Alignment Technology redefines everything that
amateur astronomers are looking for - quick and simple alignment, GPS, unsurpassed optical
quality, ease of set-up and use, ergonomics, enhanced computerization and, most important,
affordability.
Features:
* Available with optional Starbright® XLT High Performance Optical System - Celestron’s
finest optical coatings provide sharp, bright clear views.
* SkyAlign Alignment Technology - Fast, easy alignment. Simply choose three bright stars. The
telescope does the rest.
* 8”, 9.25”, and 11”models.
* Convenient remote hand control holder - Allows you to view information hands-free while
using the scope.
* 40,000+ object database.
* Ergonomic design - Comfortably lift and move the telescope from location to location.
* Re-designed drive base and drive mechanics - Quiet operation; large drive gears, quick
release clutch; Auxiliary ports for AutoGuider, PC; easily mounts to tripod.NexRemote™-
compatible.
* Permanent PEC
* Newly - designed heavy-duty tripod.
Technical Specs
* Optical Design: 9.25” Schmidt-Cassegrain
* Focal Length: 2350mm F/10
* Finderscope: 50mm Finderscope w/ quick release bracket
* Mount: Dual Fork Arm
* Optical Tube: Aluminum
* Eyepiece: 40mm Plossl (59x)
* Star Diagonal: 1.25”
* Accessory tray: Leg Brace / Eyepiece holder
* Tripod: Heavy Duty Steel Adjustable
* Power Supply: Car battery adapter
* Telescope Control System: NexStar Computer Control System
* Hand Control Ports: RS-232 communication port on hand control
* Motor Ports: Aux Port, Autoguide Ports
* Database: 40,000 Object Database
* GPS: Internal 16 channel
Software Specs
* Motor: Type: DC Servo motors with encoders, both axes
* Resolution .1406 arcsecond
* Slew Speeds: Nine slew speeds: 3º /sec, 2º /sec, .5º/sec, 64x, 16x, 8x, 4x, 1x, .5x
* Software Precision: 24bit, 0.08 arcsec calculations
* Tracking Rates: Sidereal, Solar and Lunar
* Tracking Modes: Altazimuth, EQ North & EQ South
* Alignment Procedures: SkyAlign, Auto Two Star Align, One-Star Align, EQ Align, Solar System
Align
* Periodic Error Correction: Permanently Programmable
Mechanical Specs
* Fork Arm: Dual fork arm, cast aluminum w/ detachable HC cradle
* Gear: 5.625” hard anodized gear in both axes, 180 tooth, brass worm
* Bearings: 9.8” azimuth bearing
Optical Specifications
* Highest Useful Magnication: 555x
* Lowest Useful Magnification: 34x
* Limiting Stellar Magnitude: 14.4
* Resolution: Rayleigh .59 arc seconds
* Dawes Limit: .49 arc seconds
* Photographic Resolution: 200 line/mm
* Light Gathering Power: 1127x unaided eye
* Field of View :standard eyepiece: .7º
* Linear FOV (@1000 yds:) 38 ft.
* Optical Coatings: Standard: Starbright Coatings or Optional: Starbright XLT Coatings
* Secondary Mirror Obstruction: 3.5”
* by Area: 13%
* by Diameter: 36%
* Optical tube length: 22 inches
* Telescope Weight: 58 lbs
* Tripod/Mount Weight: 19 lbs
Electronic Specifications
* Power Requirements 12VDC 1.5A
* Idle Current: 340mA
* Slew one axis: 640mA
* Slew both axes: 900mA (with 1A spikes)
* Cord Management: Software
Celestron has brought its renowned StarBright technology to an even higher level of light
transmission with the introduction of our new optional StarBright XLT High Performance Optical
Coating System.
StarBright XLT Optical System Design - You’ll See The Light.
One of the most important factors in the evaluation of a Schmidt-Cassegrain telescope’s optical
system performance is its transmission - the percentage of incoming light that reaches the focal
plane. The design of the XLT System accomplishes two crucial objectives: Develop a coating system
that is optimized for visual use and for CCD/Photographic imaging.
The StarBright XLT System - What Makes It Different Makes It Better
There are three major components that make up our StarBright XLT high transmission optical system
design:
1. Unique enhanced multi-layer mirror coatings
Our mirror coatings are made from precise layers of Aluminum (Al), SiO2 (quartz), TiO2 (Titanium
Dioxide), and Si02. Reflectivity is fairly flat across the spectrum, optimizing it for both CCD
imaging and visual use. Click here to see a plot of the reflectivity of XLT’s Mirror Coatings.
2. Multi-layer anti-reflective coatings
Made from precise layers of MgF2 (Magnesium Fluoride), and HfO2 (Hafnium Dioxide) A rare element
costing nearly $2000 per kilogram, Hafnium gives us a wider band pass than Titanium, used in
competing coatings. Click here to see a plot of XLT’s corrector transmission.
3. High Transmission Water White glass
Celestron Schmidt-Cassegrain optical systems with optional StarBright XLT coatings use Water
White glass instead of Soda Lime glass for the corrector lens. Water White glass transmits about
90.5% without anti-reflective coatings. That is 3.5% better transmission than uncoated Soda Lime
glass. When Water White glass is used in conjunction with StarBright XLT’s anti-reflective
coatings, the average transmission reaches 97.4% - an 8% improvement! Click here to see a plot of
water white glass versus soda lime.*
These three components of our StarBright XLT coatings result in one of the finest coatings
available. The peak transmission for the systems is 89% at 520 nm. The overall system
transmission is 83.5% averaged over the spectrum from 400 to 750 nm.
Celestron’s CPC Series with revolutionary SkyAlign Alignment Technology redefines everything that
amateur astronomers are looking for — quick and simple alignment, GPS, unsurpassed optical
quality, ease of set-up and use, ergonomics, enhanced computerization and, most important,
affordability.Features:
* SkyAlign Alignment Technology — Fast, easy alignment. Simply choose three bright stars. The
telescope does the rest.
* 8”, 9.25”, and 11” models.
* Convenient remote hand control holder — Allows you to view information hands-free while
using the scope.
* 40,000+ object database.
* Ergonomic design — Comfortably lift and move the telescope from location to location.
* Re-designed drive base and drive mechanics — Quiet operation; large drive gears, quick
release clutch; Auxiliary ports for AutoGuider, PC; easily mounts to tripod.NexRemote™-
compatible.
* Permanent PEC
* Newly - designed heavy-duty tripod.
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