A 100mm f/14 Maksutov-Cassegrain on the EXOS Nano EQ3 German equatorial mount — pairing the most compact optical tube in the FirstLight line with equatorial tracking for steady, high-magnification planetary observation.

The 100mm Mak-Cass packs 1400mm of focal length into a tube just 12.6 inches long and 4 pounds. The f/14 focal ratio delivers sharp, high-contrast views of lunar craters, Saturn's rings, and Jupiter's cloud bands. The sealed meniscus corrector means no collimation and no dust — maintenance-free optics. Fully multi-coated throughout.

The EXOS Nano EQ3 mount adds equatorial tracking with dual slow-motion cables — essential at the high magnifications this telescope is designed for. Once polar-aligned, a gentle turn of the RA cable keeps planets centered in the eyepiece for extended observation without the constant two-axis corrections an alt-az mount demands.

Key Features

• 100mm f/14 Maksutov-Cassegrain, fully multi-coated
• 1400mm focal length in a 12.6" sealed tube
• EXOS Nano EQ3 German equatorial mount (15 lb capacity)
• Dual slow-motion cables and 2.5 lb counterweight
• 25mm Plossl eyepiece (56x), 1.25" 90° diagonal, red-dot finder
• Smartphone camera adapter included

Ideal For

• Planetary specialists wanting tracking — the EQ mount keeps Jupiter and Saturn centered at high power
• Compact-setup observers — the 4 lb tube and folding tripod travel easily to dark-sky sites
• Lunar imagers — equatorial tracking and the long focal length support detailed smartphone and webcam lunar photography