Description
iOptron’s 250mm (approx. 9.8") f/4 Newtonian optical tube assembly (OTA) with a fast F/4 focal ratio is perfect for imaging deep-sky objects with a DSLR or dedicated astronomy camera. The 3.25" Crayford-style focuser, dual split-hinged mounting rings, an 8x50 straight-through finder, and an 13" Vixen style dovetail plate make it ready to attach to your mount and start using.
Features
- Dual speed 3.25" Crayford-style focuser with 1.25" adapter iEAF ready
- BK7 optical glass primary mirror with a protective quartz layer
- 8 x50mm finder scope
- 13" Vixen style dovetail plate with solid full circumference mounting rings
- Front dust cap
- Optional iOptron iEAF Focuser (#8453)
Package includes
#6313 10" Fast Newt OTA
- 10" Optical tube assembly
- 8x50 mm straight-through finder with bracket
- Tube mounting rings
- 13" Vixen-style dovetail rail
- 2" 35mm extension tube
- Front dust cover
| Optical Design | Newtonian |
| Clear Aperture | 250mm |
| Focal Length | 1000mm |
| Focal Ratio | f/4 |
| Focuser | Dual speed Crayford-style |
| OTA Length | inches |
| Outside diameter | 12 inches |
| OTA weight | 34lb. 1oz |
| Extension tube | 2" diameter 35mm L |
| Warranty | One year limited |
Additional Resources
What can I see with this telescope?
Max reasonable eyepiece power (no Barlow) in good seeing is approximately
— mm (—×)
Bright objects such as the Moon and planets may allow you to use approximately
— mm (—×)
Larger aperture (diameter) telescopes will produce a brighter view of objects
Viewing location and sky conditions can vary and will affect actual results.