The Meade Series 4000 Zoom is an excellent addition to telescopes of all types, brands, and price levels, whether 60mm refractor, 8' Dobsonian, 90mm ETX, or 12' LX200 Schmidt-Cassegrain.
Conceived by one of the world's leading designers of photo-optical instruments, this 7- element system provides an apparent field of 40° at the 24mm setting, increasing continuously to a 55° field at 8mm. The internal zoom optics move on smooth, precisely.
machined surfaces which maintain optical collimation at all zoom settings. A scale graduated in 1mm units indicates the zoom focal length in operation. All lenses are multi-coated for maximum light transmission and image contrast, while minimizing internal reflections. The chromed brass barrel is threaded for filters.