Explore Scientific 208mm f/3.9 Newtonian Telescope - Carbon Fiber
The Explore Scientific carbon fiber Newtonian is a beautiful piece of work; smooth black lines and a shine to the material that produces a beautiful gleam. Crafted to allow a larger primary mirror with a faster aperture ratio compared to the usual 8'' f/4, the Explore 208mm Newtonian telescope allows deeper shots with the same exposure time. The 'click fix' secondary mirror mechanism is included to permit easy and optimal collimation. The secondary mirror comes out to 80mm, allowing optimal field illumination. All in all, it is a scope of stellar quality, perfect for attaching to any telescope in need of one. It also includes a high quality 2'' focuser with 10:1 reduction; cradle rings with vixen style dovetail rail and carrying handle, all with an option for mounting a camera or other accessory. Yet another advantage of the Newtonian Fiber Scope is that it weighs a fourth of the usual aluminum Bresser versions of similar design, and focus drift is virtually nonexistent during long exposures!
- Primary Mirror Diameter: 208mm
- Secondary Mirror Diameter: 80mm
- Focal Length: 812mm
- Focal Ration: 3/39
- Resolving Power: .6 arc seconds
- Optical Tube Assembly Weight: 18.3lb.; 8kg
- Dovetail: Vixen
- Additional Information
SKU ES-N208CF UPC Code 812257014996 Manufacturer Explore Scientific Telescope Series Explore Scientific Newtonian Optical Design Newtonian Reflector Mount Type None - Optical Tube Only Warranty Lifetime Warranty Telescope Aperture 208mm Telescope Focal Length 812mm Telescope Focal Ratio f/3.9 Tube Color or Finish Carbon Fiber Optical Tube Weight 18.3lb.; 8kg Dew Shield Included? No, Sold Separately OTA Mount Type Vixen-Style Dovetail Diagonal Included? No - Not Required Eyepiece(s) Included None Focuser Size 2" Focuser Style Rack & Pinion Manual or Electronic Focusing? Manual Focusing Speeds Two-Speed Case Included? Yes Tripod Type Included None, Sold Separately
- Included Items
- 208mm Newtonian Optical Tube
- Cradle Ring
- V Style Dovetail
- Finder Scope Bracket
- Soft Carry Case
- Questions & Answers
Product QuestionsQuestion by: Abraham on Dec 21, 2015 4:58:00 PMThe manufacturer does not state if there are internal baffles in this telescope, but from pictures of this scope it does not appear that there are any internal baffles. The interior of the tube is likely blackened and thus may not need any baffling to acheive excellent contrast.Answer by: Chris Hendren (Admin) on Dec 21, 2015 6:11:00 PMHi, I am asking you from Japan.
I would like to know the distance between the focuser connection and the focal plane. The reason why I need to know it is that I want to use The Astrosystems Austria (ASA) 2" Reducer Corrector(Item # A2-2KORRR) in this telescope. Other candidates are the similar telescopes made by Sky Watcher (QUATTRO-8CF) and TS Telescopes (UNC2008).
Thanks for your considerations.I am considering this newt. Could the carry handle be removed and replaced with a dovetail so I can mount my 80mm refractor on this newt?Hello:
Can the 280mm carbon fiber scope be use for visual too. I'm not into photography but would like to put this on the alt -AZ mount.
Thanx for reply,
MarkIs this newt available with a crayford two speed focuser instead of the rack and pinion? Who makes the coma corrector?Question by: Jack Bruner on Mar 13, 2017 10:27:00 PMQuestion by: Jeff on Jul 1, 2017 9:44:00 AMGood afternoon and thanks for asking. This calculation is as dependent on the quality of the telescope as it is on the power of the eyepiece, your age, and the condition of your eyes. I very quickly found a limiting magnitude calculator that you can use here http://www.cruxis.com/scope/limitingmagnitude.htm . Enjoy playing with it or find another that you may like more.Answer by: Charles Walker (Admin) on Jul 6, 2017 1:27:00 PMI would like to know the distance between the focuser connection and the focal plane. The reason why I need to know it is that I want to use the ASA-2Korrr(ASA 2-inch Newton Coma Corrector and 0.73x Reducer) in this telescope. Other candidates are the similar telescopes made by Sky Watcher and TS Telescopes. Thanks for your considerations.Question by: Atsushi Yokota on Mar 2, 2017 9:08:00 AMAccording to Explore Scientific, the back focus distance is in between 90 and 93 mm considering the eye piece ring with and without. Total focuser travel is 33mm. We can assist you with getting the needed ASA parts as well if you need them. Please contact me at email@example.com if you have any questions.Answer by: Chris Hendren (Admin) on Mar 16, 2017 8:38:00 AMES website offers a coma corrector and all accessories you offer at OPT. Is this correct? No coma corrector offered at this price point?
AbrahamShould i get a dew shield/heater for this. It seems like dew is a more problematic for scope with exposed obj lenses.Question by: Chuby Okafor on Sep 24, 2015 11:23:00 AMChuby,
You really don't need a dew/shield for the Newtonian. Like you said, when the objective or corrector plate is close to the opening,
then you need it. The dewshield also acts as a light shield, which the Newtonian already has. I could see some rare instances
when you have heavy dewing that might affect the mirror but generally no.
Answer by: Steve Thornton (Admin) on Sep 25, 2015 1:49:00 PM
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