Specifications for this Bushnell telescope include:

• Power/Obj.: 100x4.5"
• Style: Reflector
• Focal length: 500mm
• Features: Pre-Assembled, Cradle Mount, Precision Rack & Pinion Focuser, Tripod Adaptable, 1.25" Format Eyepieces, Convenient Shoulder Strap, Camera Adaptable

Tech Talk
Magnification (Power): The magnification of a telescope is determined by dividing its focal length by the focal length of the eyepiece being used. For example, a 500mm telescope with a 5mm eyepiece would magnify objects 100x. Thus, a telescope can provide nearly any magnification required depending on the focal length of the eyepiece used.

Objective Lens Size (or Aperture): The size of the telescope’s objective lens, or aperture, limits the amount of power that can be used effectively. As the magnification of an object increases, the brightness of the image decreases. This is because the light gathered by the telescope is being spread over a larger area.

Reflectors: Reflectors feature larger apertures for a wide range of viewing at an affordable price. Designed with the eyepiece located at the top of the tube, reflectors are more comfortable to use for viewing night-sky objects such as nebulae, the Moon, planets and galaxies. Reflectors tend to be heavier and larger than refractors.

Focal Length: The measured light path of the optical system (tube length), typically measured in millimeters.

Product Description
Focal length: 400mm Eyepieces: 4mm 25mm Magnifications: 16 100 Cradle mount Precision rack and pinion focuser Tripod adaptable 1.25 format Convenient shoulder strap