Explore Scientific FirstLight 90mm f/5.5 Doublet Refractor Telescope with Alt-Az Mount

A complete 90mm doublet refractor telescope kit with a yoke-style alt-az mount, tripod, and two eyepieces — everything a beginner needs to start observing the Moon, planets, and bright deep-sky objects at the lowest entry price in the FirstLight lineup.

The 90mm air-spaced doublet objective gathers enough light to show lunar craters, Saturn's rings, and Jupiter's cloud belts. The erect-image diagonal delivers correctly oriented views for daytime terrestrial use as well. Two Kellner eyepieces (9mm and 20mm) provide low and high magnification out of the box.

The yoke-style alt-az mount moves smoothly up/down and left/right with no alignment required — just point and look. The full-size aluminum tripod with accessory tray sets up in under a minute.

Key Features

• 90mm f/5.5 air-spaced doublet refractor
• Yoke-style alt-az mount with adjustable aluminum tripod
• Two Kellner eyepieces: 9mm (56x) and 20mm (25x)
• 1.25" erect-image diagonal for correct orientation
• Red-dot finder and smartphone camera adapter included

Ideal For

• First-time telescope buyers — the simplest setup in the FirstLight line
• Kids and families — no alignment, no learning curve, just point and observe
• Daytime use — the erect-image diagonal makes this a capable spotting scope