The Telescope Authority
Since 1947

View Shopping Cart

Your Cart is Empty

Explore Scientific Bresser 208mm Newtonian f/3.9

SKU : ES-BR-N20839

- Read
Add to Wishlist

52D158B8-B55E-4DF3-8064-D4A13DFFDDC4 Request stock alerts and we'll let you know when the item is back in stock

Got questions? Click for live chat

  • Bresser 208 mm Newtonian f/3.9 OTA
  • Manual Focuser
  • Focal Length: 812 mm
  • Focal Ratio: f/3.9
  • Accepts 1.25 Inch and 2 Inch eyepieces
  • Tube weight: 22 lb


Product Details

  • The Explore Scientific Bresser Series 208mm Newtonian Reflector f/3.9 OTA has a large aperture (8.19 Inches) and short focal length of 812 mm (31.97 Inches) produces a fast, rich-field optical design. 

    The Bresser N20839 is perfect for wide-field deep sky astrophotography and visual observations of stellar clouds, nebulae, and galaxies.  This fast Newtonian Reflector features a no-tool collimation knob for the primary and secondary mirrors to make precise collimation adjustments easy.  Use with the optional HR Coma Corrector for pinpoint stars across the field of view.


    OPT Product Number: ES-BR-N20839


  • specifications

    Aperture208 mm (8.25")
    Focal Length812mm
    Focal Ratiof/3.9
    Optical DesignNewtonian
  • included items

    • Bresser 208 mm Newtonian f/3.9 OTA
    • Manual Focuser
    • Dovetail Viden-Style plate/ Rings/ Handle
    • Finder mounting plate only
    • Explore Scientific USA Limited 1 Year Warranty



Product Reviews

Customer Reviews
4.0 Based on 1 Reviews
5 ★
4 ★
3 ★
2 ★
1 ★
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
  • bolt
  • EQ6R
  • issue
  • reason
  • look
  • tape
  • plan
  • rings
  • dovetail
  • observatory
Mike B.
United States United States

Excellent astrophotography newt if you're willing to tinker a bit.

I've logged a lot of hours with this telescope now, had it for a few months. It's permanently mounted on a pier in my observatory on an EQ6R-PRO. The mirrors/optics are fantastic. The focuser tube that it comes with is suprisingly good too - it handles the weight of my imaging train with filter wheel and a motorized focuser without issue. You will have to adjust the tension though depending on what you have loaded on it. Some issues lets see... the stock rings/dovetail are too close together. You'll have all kinds of flex issues, focus/collimation changing slightly after meridian flips, etc. I bought two 13" bars to spread the rings nice and far apart. One of the rings is now just below the focuser tube and I get zero issues with focus tube flex. So... plan on another X bucks for longer bars at least. The metallic "puck" suspended by the spider vanes holding the secondary was installed upside down on mine. If you find that for whatever reason you cannot center the secondary exactly to the focuser tube like it just can't get "high" enough, take a look at that. Otherwise, tear it down, flock the inside of the tube with some good dark flocking tape, install a primary fan, QC every nut and bolt make sure good and tight - you got yourself a sweet little photo newt for a good price!