Explore Scientific N208CF Newtonian - Astrograph Edition - OTA

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Explore Scientific N208CF Newtonian - Astrograph Edition - OTA

The Explore Scientific N208CF 208 mm (8.25-Inch) Aperture Newtonian - Astrograph Edition OTA offers large aperture and super-wide field at f/3.9.

Field tested and updated by astrophotographers, this 208 mm (8.25-inch) f/3.9 Newtonian produces tight, round stars with the recommended 2-Inch HR Variable Coma Corrector (EX-HRCC02-00). This telescope assembly with its Carbon Fiber tube has very low expansion characteristics to hold its focus position, is also very lightweight, and a lightweight telescope performs better on any mount that it is placed on. 

The very fast f-ratio f/3.9 Parabolic Newtonian with Borosilicate Secondary and Low Expansion H-PZ33 Primary Mirror optics provides a focal length of 812 mm. The already very bright visual images is further enhanced with 97-percent reflectivity EMD coatings. No-tool 3-point push-pull collimatable secondary holder adjustments and no tool adjustments for the clip-less primary mirror holder cell have locks to keep optics aligned for the best images. 

Precise focusing is achieved with the Two Speed 2-inch Rack and Pinion Focuser with 50 mm Extension Tube, and 1.25-inch Adapter.

Other features include a finder scope base to mount an optional Illuminator II correct image 8x50 Illuminated Polar Right Angle Finder Scope (ES-VFEI0850-RA) or the correct image version 8x50 Straight Through Illuminated Viewfinder (ES-VFEI0850–01)

This Newtonian Optical Tube Assembly is handled and supported by metal Cradle Rings with a contoured metal Handle/Grip that is slotted to allow a 1/4x20 attachment bolt for piggyback attachment of a DSLR. The 45 mm Wide, 203 mm Long Dovetail Plate (Vixen-style) mounts to fit a huge range of mounts from Explore Scientific and other brands. This dovetail plate has adjustment bolts with locks to adjust for precision cone angle adjustments. 

The package includes a padded, top-loading Soft Carrying Case to protect the optical tube assembly while transporting the instrument to your backyard or your favorite dark sky site for an imaging run or deep sky visual observations. 


Manufacturer's Part Number: N208CF-01



Aperture208 mm (8.25")
Camera/Eyepiece Connection2" Nosepiece
Dawes Limit0.56 arcseconds
Focal Length812 mm
Focal Ratiof/3.9
Free ShippingYes
Highest Magnification416x
Light Gathering Power883x
Limiting Magnitude15.3
Optical DesignNewtonian
Secondary Obstruction72mm
Tube Length812mm
Tube Weight19.1 lbs