Starfield Newtonian 150mm f/4 Reflector Telescope (OTA Only)

View and photograph deep-sky objects like galaxies and nebulae with the Newtonian 150mm f/4 Reflector Telescope from Starfield. This fast optical tube assembly features a BK7 glass primary mirror with dielectric and quartz coatings that is mounted in a cell with six collimating knobs and center marked for easy collimating with a laser. The design allows a nearly 2° diagonal field of view for a camera with an APS-C sensor, accommodating large objects such as the Andromeda galaxy or the Orion nebula.

The rigid linear-bearing 2" Crayford focuser can handle the weight of a DSLR or dedicated camera plus imaging accessories. The interior of the tube is matte black to reduce stray reflection. Felt-lined hinged rings won't mar the exterior and M6 screw holes allow you to add a second dovetail on top. A cooling fan for the primary mirror runs on eight AA batteries. The OTA is offered here without a tripod or mount head.

Optical Performance

• Aperture: 150mm
• f/4 focal ratio
• 600mm focal length
• Newtonian reflector optical path
• Dieletric BK7 primary mirror with quartz layer for durability
• Mirror is center-marked for easy laser collimation
• 2" linear-bearing two-speed Crayford focuser supports DSLR or CCD/CMOS cameras, filter wheels, off-axis guiders
• 2 to 1.25" eyepiece adapter

Mounting

• Optical tube assembly (OTA) only—separately available mount and tripod are required for proper use
• Vixen-style dovetail plate is compatible with a wide array of alt-az, EQ, and GoTo mounts
• Felt-lined cradle-ring assembly allows the position of the OTA and focuser orientation to be adjusted for precise balancing, comfortable use, and to avoid interference with other equipment
• 2" extension adapter
• Integrated carry handle offers stable handling during setup and breakdown
• M6 screw holes allow adding an optional second dovetail on top of rings

Finderscope

• 8x magnification ensures a wide field of view for alignment and star-hopping navigation
• Large 50mm aperture
• Illuminated crosshair reticle ensures objects are properly centered