PRECISION: Rotary mount to set the filter effect (light reduction: 1.5–2 EV) | QUALITY: High-quality glass featuring ZEISS T anti-reflective coating | COMPATIBILITY: High-fit accuracy for fast filter change. Can be used with a lens shade. Can be used with non-ZEISS lenses | EFFECT: Minimizes light reflections on non-metallic surfaces and increases the color saturation of long-distance shots

A twist of the zoom eyepiece housing changes focal length from 21mm to 7mm, providing a variety of viewing magnification powers. Excellent contrast and sharpness - making the zoom also of interest for planetary observing. | Exceptionally long 16mm-to-33mm eye relief range allows eyeglass wearers to enjoy the entire view while still wearing their corrective lenses without vignetting. The Zoom eyepiece lets you change magnification power without physically changing eyepieces. | Apparent field of view is 30- degree at 21mm and 43- degree at 7mm. Rubber traction ring ensures a good grip. The 1.25" barrel is threaded for filters. Actual magnification range will depend on the focal length of your telescope. It works equally well for astronomical or terrestrial viewing. | Eyepiece consists of four elements which are fully coated with anti-reflection coatings for clear, high contrast views. The particularly large eye lens coupled with the long eye relief means the Zoom provides particularly good viewing comfort, the eyecup can folded down - handy for spectacle wearers. | Comfortable viewing at every focal length setting - superior to most fixed focal length eyepieces, especially at the shorter focal length settings, precise and stepless adjustment from 7mm to 21mm. A nice value in a quality zoom eyepiece!

WIRELESS STREAMING: The receiver rack mount features a premium built in Bluetooth 2.1 wireless streaming receiver. Making the receiver compatible with all your favorite devices, like iPhone, Androids, tablets, etc. It has a wireless range of 30’ plus | HOME STEREO AMP: The rack mount home theater amp is a complete sound system. It acts like an FM radio with a digital LCD display with ID3 tag readout displaying each song title. Also features a 2.1 channel audio amp design | CONNECT TO EXTERNAL DEVICES: The rack mount home theater amp features USB flash and SD memory card readers, as well as a 3.5mm aux input jack and multi source RCA audio input connectors | RELIABLE & DURABLE: The home theater receiver is made of heavy duty metal and aluminum alloy panel to protect your gear for years to come. The package includes sturdy removable rack mount brackets for trustworthy and easy installation | WHAT'S IN THE BOX: The audio receiver rack mount comes with everything you need to get started. This exclusive bundle from Pyle features our top of the line amplifier receiver, wireless remote control, detachable hardware rack mounts and FM antenna