Optiques Fullum Folded Newtonian 30″ f/3.5
NOTE: These Telescopes are custom-made systems. Please contact us to discuss your specific requirements at [email protected], or feel free to call us during our posted business hours at 1-800-860-3429. The final price can vary depending on your custom requirements. The price does not include crating and shipping.
Fullum-folded Newtonian®: For large telescopes of 30 inches and more, Optiques Fullum developed a unique “Fullum-folded Newtonian” structure. In this configuration, a parabolic primary mirror with a very short focal (F/3.5-F/4) is coupled to a secondary mirror placed much lower than normal, which will redirect the optical axis at a 17.5-degree angle instead of 45 degrees. This results in a more secure focal spot for the observer.
- For example, a 50-inch F/3.5 telescope ocular support would normally be made at a height of 18 feet. By using the unique “Fullum Folded” structure, the ocular support will be at a height of only 8.5 feet.
Specifications:
- Optical design: Newtonian reflector
- Objective diameter: 762 mm
- Focal length: 2667 mm
- Focal ratio: f/3.5
- Resolving power: 0.15 arc second
- Stellar limiting magnitude: 17.11
- Max. magnification: 1905 x (theoretical)
- Light gathering power: 11,850 times the human eye
- SKU: OF-30FOLDED
In the following video, Normand Fullum describes how he developed, and produces, his lightweight Techno-Fusion primary mirrors for the Fullum Folded Newtonian telescopes:
In the following video, the RASC (Royal Astronomical Society of Canada) gets a tour of Normand Fullum’s workshop:
