The new Sky-Watcher Quattro Imaging Newtonian with dual-speed focuser incorporates a superb mirror-set with two significant advantages over competing products. A 2" dual-speed 10:1 ratio focuser is included for excellent focusing precision. Additionally, the tube length has been slightly shortened to optimize performance for prime-focus photography.
Even better performance for astro-photography, and visual use, can be achieved when used in combination with the Sky-Watcher Quattro coma corrector.
|Mirror Coatings||94% Aluminum|
|True Aperture (mm)||257|
|Primary Aperture (mm)||254|
|Focal Length (mm)||1000|
|Secondary Obstruction (by diameter)||35%|
|Secondary Obstruction by Area||12%|
|Light Gathering (compared to next size down)||57%|
|Focuser||2" Dual Speed Crayford|
|OTA Length (Retract/Ext.)||36.5"|
|OTA Outer Diameter||11.375"|
|OTA Weight (with accessories)||36.5|
|Included Finder||9x50 Finder|
|Shipping Weights & Dimensions|