Celestron - C9 1/4-SGT Advanced Series with STARBRIGHT XLT Coatings

$ 1999.00

11046XLT

Click here for recommended accessories

Celestron - C9 1/4-SGT Advanced Series with STARBRIGHT XLT Coatings

CG-5 Computerized - GoTo convenience and GPS compatibility for precision accuracy 
We are proud to offer
a computerized GoTo version of Celestron's sturdy CG-5 mount. Couple this solid mount with the included computerized control
system to utilize many of the same functions and features - like the NexStarcomputer control system and an Autoguider port for
long exposure deep sky astrophotography - as Celestron's most advanced GoTo telescopes. 
GoTo models are also upgradeable to GPS with the optional CN16 GPS Accessory (#93966) allowing your telescope to pinpoint your
position on the earth, the date and 

StarBright XLT Coatings
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. 


Suggested Optional Accessories
	

 
		
WHCT - WHT Accessory Kit: 10mm Eyepiece - 8mm Eyepiece
	

$ 29.90
$ 79.90


	

		
	
		WHTKIT2
	


		
Celestron - Accessory Kit - 1-1/4 inch Eyepiece and Filter Kit
	

$ 149.95
Reg.$ 230.95
SAVE $ 81.00


	

		
	
		94303
	


		
Celestron - CN16 GPS Accessory for the CGE Series
	

$ 249.00
Reg.$ 368.95
SAVE $ 119.95


	

		
	
		93967
	


		
Celestron - LPR Filter (Model A - for 1-1/4 inch Eyepieces)
	

$ 65.00


	

		
	
		94126A
	


		
Celestron - MOON FILTER Filter - 1-1/4 inch
	

$ 13.95
$ 15.95


	

		
	
		94119-A
	


		
Celestron - Contrast Booster Filter - 1-1/4 inch
	

$ 36.00
Reg.$ 69.95
SAVE $ 33.95


	

		
	
		94121
	


		
Celestron - Car Battery Adapter (for U2000, all NexStars)
	

$ 15.95
$ 19.95


	

		
	
		18769
	


		
Celestron - Flashlight Night Vision
	

$ 15.95
$ 21.95


	

		
	
		93588
	


		
Celestron - VSP - Vibration Suppression Pad
	

$ 39.95
Reg.$ 65.95
SAVE $ 26.00


	

		
	
		93503
	


		
Celestron - Powertank 7
	

$ 59.95
Reg.$ 84.95
SAVE $ 25.00


	

		
	
		18774
	


		
Celestron - Powertank 17
	

$ 89.95
Reg.$ 143.95
SAVE $ 54.00


	

		
	
		18777
	


		
Celestron - Sky Map
	

$ 24.95
$ 35.95


	

		
	
		93722
	

 
		
TeleGizmos - Cover for 8 inches-10 inches   EQ Mounted SCTs			
Tube length up to 28 inches, major height 38 inches
	

$ 139.00


	

		
	
		T3G1