The Robtics 8 inch F4 Photo-Newton is a high quality mechanically built Newtonian Telescope with high quality optics offering amazing views of the night sky. With 8 inch aperture and 800mm focal length the Photo-Newton gathers 77% more light than a 6 inch telescope. The Robtics PN8F4 is a great telescope for astrophotography as well as visual observing!
- 203 mm aperture | 800 mm focal length | F4 focal ratio
- High quality optics
- Dual speed 2 inch Monorail focuser
- Finder scope 8x50
- Deluxe dovetail
The Robtics Photo-Newtons is a series of fast Newtonian telescope systems specially designed for astrophotography and visual wide field observation. The optics are of high quality with 95% reflectivity coatings. The enlarged secondary mirror in order to better illuminate larger chips. The over extended metal tubes make the secondary mirror less likely to fog up while the fast F4 focal ratio is keeping the overall length of the tube still very short.
The Robtics PN8F4 is a high quality mechanically built Newtonian Telescope with high quality optics offering amazing views of the night sky. With 8 inch aperture and 800mm focal length the PN8F4 gathers 77% more light than a 6 inch telescope. The Robtics PN8F4 is a great telescope for astrophotography as well as visual observing!
203 mm aperture is capable of showing many details on planets, thousands of craters on the moon and deepsky objects show more than just a fuzzy smudge. An 8 inch Newtonian telescope is a very useful telescope for stargazing and it is amazing for astrophotography!
All components of the telescope are manufactured using high quality materials to make sure you'll have many years of observing fun with your new telescope!
High Quality Primary Mirror
The Robtics PN8F4 has a parabolic primary mirror made of BK7 glass with 95% reflective quartz coating. With 8 inch aperture and 800mm focal length the PN8F4 gathers 77% more light than a 6 inch telescope. The mirror's center mark makes collimation with a laser collimator super easy!
High Quality Primary Mirror Cell with Collimation Screws
Speaking of collimation, the PN8F4 holds collimation very well because of the heavy-duty mirror cell combined with three collimation screws and three extra collimation lock-screws.
High Quality Secondary Mirror
The 70mm secondary mirror is also made of BK7 glass and also has 95% reflective quartz coating.
Sturdy Secondary Mirror Spider
The secondary mirror holder and extra thin (0.5mm) spiders are made from metal and very sturdy making sure that collimation is very stable. Collimation is achieved with allen wrench keys and Robtics advises to upgrade these to Bob's Knobs for easy no-tool collimation.
Dual Speed Focuser
The Monorail focuser outperforms Crayford style focusers and has a load capacity of around 3kg. It runs very smoothly and friction can be adjusted to taste. The focuser comes with a 10:1 reduction providing very fine, ultra precise focusing for crisp images. The 2 inch focuser can hold 2 inch accessories. 1.25 inch accessories can also be used with the included reducing adapter. The focuser and the adapter have an internal compression ring for a very firm grip of your accessories. Extra large knobs with knurling are used to make tightening/loosening even with cold fingers extra easy.
Primary Mirror Fan for Rapid Mirror Cool Down
Warm telescope optics produce terrible images. Robtics advises to bring the telescope out some time before you start observing giving the mirrors time to cool down to ambient temperature. The fan at the back of the telescope blows outside air onto the telescope's primary mirror significantly speeding up the cooling process. More time to observe!
The Robtics PN8F4 comes with high quality accessories. Unpack, set-up, start photographing!
8X50 Finder Scope
The fully adjustable finder scope with integrated cross hairs make finding objects easy. 50mm aperture provides enough light and eight times enough magnification to actually see the object you are looking for instead of guessing the location through a red dot finder.
35mm extension tube
For maximum usability the PN8F4 has an extended back focus and the included extension tube makes sure you can reach focus with all your favorite eyepieces or photographic accessories. The 2 inch extension tube with an optical length of 35mm has an internal compression ring for a very firm grip of your accessories.
The included battery holder accepts four AA-type batteries and powers the primary mirror fan.
- Aperture: 8 inch - 203 mm
- Focal Length: 800 mm
- Focal Ratio: F4
- Primary Mirror: Parabolic mirror made of BK7 glass with 95% reflectivity quartz coating
- Tube Diameter: 230 mm
- Tube Length: 1730 mm
- Weight: 8 kg
- Telescope System
- Optical Tube Only (OTA)
- Telescope type
- Telescope Aperture (mm)
- Telescope Focal Length (mm)
- Telescope Focal Ratio (F)