- Express delivery within the EU
TS-Optics 8" f/12 Hyperbolic Cassegrain telescopes are excellent high contrast and optically sharp instruments, particularly well suited for lunar and planetary viewing and imaging.
In terms of optical quality, Cassegrain telescopes are traditionally more advantageous than other similar designs such as SCT's which generally contain more basic spherical mirrors and a larger central obstruction. Being an open ended system, similar to Newtonian designs, these cassegrains are also less susceptible to dew formation and also adapt to temperature changes much more quickly.
Advantages of the TS-Optics Cassegrain design:
- Well corrected field due to parabolic primary and hyperbolic secondary mirror with less field curvature compared with other cassegrain designs.
- These are a pure reflection system without a Schmidt plate, resulting in better sharpness as well as the possibility for IR Photography
- Significantly quicker temperature adaption thanks to Newtonian style open ended design.
- Brighter image due to 96% dielectric coating on primary and secondary mirror.
- No mirror shifting while focusing, because the primary mirror is fixed.
- Includes a high-quality 2" Crayford focuser with micro-gear reduction and compression rings for 2" and 1.25" accessories
- Only 33% obstruction caused by secondary mirror.
- Better sharpness on the optical axis due to precise mirror surfaces and the lack of a front plate
- Several interior baffles for even higher image contrast
- Generous backfocus allowing the use of 2" accessories.
- Compact tube with only 580mm length - so can be operated with smaller mounts
- Primary and secondary mirrors are adjustable
- Optics: Cassegrain optics with parabolic primary and hyperbolic secondary mirror
- Aperture: 203 mm (8")
- Focal length: 2436mm
- F-ratio: f/12
- Colimation aid: Central marks on the secondary mirror for easier collimation
- Suitable for Infrared photography: yes
- Backfocus: Roughly 150mm from the 2" receptacle
- OTA diameter: 230 mm
- OTA length: Approx 620mm
- Weight: 8.2 kg
- Secondary mirror obstruction: 33% (linear)
- Focuser: 2" Crayford focuser with micro-gear reduction
- Connection thread of the focuser: M90x1 on the tube
- Dual Dovetail: Vixen/EQ5 + Losmandy style
- 8" f/12 Cassegrain OTA
- 2" focuser with reduction to 1.25"
- Dual Dovetails
- Dust protection cap for the focuser and front aperture
- Finder shoe (mounted)
- M90 extension tubes
REPUBLIC OF IRELAND
Est. Delivery Time:
5 - 7 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 very large Telescopes over 45kg, it may require special handling instructions and 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 very large Telescopes over 45kg, it may require special handling instructions and 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.
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.