- Express delivery within the EU
The EdgeHD optics (Edge High Definition) combine the compact design of a Schmidt-Cassegrain with a significantly improved flat field at the edge of the mirror for imaging. This optical system not only offers the properties of astrographs, but also produces completely undistorted, sharp images right up to the edge of the large visual and photographic field of view. Not only is the coma outside of the optical axis corrected - but also the field curvature!
Many optical systems are promoted as "astrographs", however, they produce the coveted "pinpoint" star image along a curved image plane. On images taken with modern CCD cameras, the result is a noticeable field curvature that increases towards the edge of the image field and becomes stronger the larger the chip is; i.e. the stars remain round, but are blown up into small rings ("donuts") towards the edge.
With the Celestron Edge HD telescopes, this field curvature is corrected right up to the edge in addition to the coma, so that even images taken with large CCD chips are able to remain completely sharp right into the corners of the image field.
This also significantly improves resolution and limiting magnitude compared to competing optical systems with a similar aperture. The Celestron XLT multi-coating also helps the Edge HD optics to achieve a significant increase in performance compared to similar systems on the market.
The EdgeHD optics produces a three-times flatter image in the field plane than a standard Schmidt-Cassegrain. The stars are imaged diffraction-limited across the entire chip of a Nikon D3 or Canon 5D for example.
Spec:
- Optical design: EdgeHD
- Optical coating: Starbright XLT (Fully Multi-Coated)
- Telescope aperture: 203.2mm (8")
- Resolution (DAWES): 0.57 arc seconds
- Resolution (RAYLEIGH): 0.69 arc seconds
- Focal length: 2032mm
- F Ratio: f/10
- Secondary mirror obstruction: 6.9cm
- Secondary mirror obstruction relative to diameter: 33.80%
- Secondary mirror obstruction relative to the surface: 11.40%
- Limiting size: 14mag
- Highest useful magnification: x480
- Light-gathering capacity (compared to the human eye): x843
- Focuser size (inches): 2" SC thread, 1.25"
- Telescope series: EdgeHD
- Tube (material): Aluminum
- Tube weight: 6.35kg
- Tube length: 17in (432mm)
- Dovetail compatible: CGE (3" Losmandy-Style)
Whats included:
-
Focal length eyepiece: 40mm
- Including accessories: 8" EdgeHD telescope with EQ rail (CG-5/Vixen-Style) 9x50
-
finder, 1.25" star diagonal, 1.25" 40mm Plössl eyepiece.
-
Viewfinder: 9x50
- Zenith prism: 1.25"
REPUBLIC OF IRELAND
Est. Delivery Time:
5 - 10 Working days after dispatch
Standard Tracked Delivery:
Republic of Ireland Nationwide: from €8.95 upwards
Note: The exact shipping charge will depend on the size of your order and will be calculated at the checkout. Some large and bulky Telescopes may also be shipped to you directly from our Manufacturer. This is a special agreement we have with our suppliers to ensure our customers enjoy the cheapest possible shipping rates for large bulky Telescopes.
For some large Telescopes & orders, it may require special handling instructions and in this case you will be asked at the checkout to contact us for a special delivery quotation.
Mainland EUROPE (EU)
Est. Delivery Time:
3 - 5 Working days after dispatch
Standard Tracked Delivery:
Mainland Europe: from €4.95 upwards
Note: The exact shipping charge will depend on the size of your order and will be calculated at the checkout. Some large and bulky Telescopes may also be shipped to you directly from our Manufacturer. This is a special agreement we have with our suppliers to ensure our customers enjoy the cheapest possible shipping rates for large bulky Telescopes.
For some large Telescopes or orders, it may require special handling instructions and in this case you will be asked at the checkout to contact us for a special delivery quotation.
EU Additional Info:
If your country is not listed below please contact us for a specialised quote.
Standard EU Delivery Regions:
Germany, France, Belgium, Poland, Luxembourg, Netherlands, Denmark, Portugal, Spain, Austria, Italy, Poland, Croatia, Malta, Greece, Monaco Norway, Sweden & Switzerland.
NON EU Regions
Est. Delivery Time:
7 - 14 Working days after dispatch
Standard Tracked Delivery:
Non-EU: from €8.95 upwards
Note: The exact shipping charge will depend on the size of your order and will be calculated at the checkout. Some large and bulky Telescopes may also be shipped to you directly from our Manufacturer. This is a special agreement we have with our suppliers to ensure our customers enjoy the cheapest possible shipping rates for large bulky Telescopes.
For some large Telescopes or orders, it may require special handling instructions and you will be asked at the checkout to contact us for a special delivery quotation.
Standard NON-EU Delivery Regions:
United Kingdom, Switzerland & Norway
Note: For Non-EU countries, in some cases additional Tax or Customs Duty fees may apply on delivery. Unfortunately this is outside of our control and this varies between different regions. For questions about Customs & Import fees or to find out if they apply in your region, please refer to your local Tax office for more information.
IMPORTANT: It is essential when placing an order, that you include a valid 'Contact Telephone Number' for the delivery address or for the person receiving the item. This is necessary to avoid potential delays, return delivery costs or problems with your delivery.
Shipping Disclaimer: All of our parcels are sent via a 3rd party registered courier service to ensure safe and prompt delivery. While we endeavor to ensure that all parcels are delivered within the specified time frame, 'Horizon Astronomy' can not be held responsible for delays due to adverse weather conditions or other courier/technical related issues outside of our control.