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Explore Scientific  |  SKU: FL-AR102600TN

Explore FirstLight 102mm f/6.5 Doublet Refractor Telescope with Twilight Nano Mount


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Ships from US warehouse in 1-2 business days

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Explore FirstLight 102mm f/6.5 Doublet Refractor Telescope with Twilight Nano Mount



  • 102mm / 4" Aperture
  • 660mm Focal Length
  • f/6.5 Focal Ratio
  • Fully Multi-Coated Optics
  • 1.25" 25mm Plössl Eyepiece
  • 90° Diagonal
  • 40mm Draw Tube Focuser
  • Smartphone Adapter
  • Twilight Nano Manual Alt-Az Mount
  • 1.25" Stainless Steel Tripod with Accessory Tray


The versatile Explore FirstLight 102mm f/6.5 Doublet Refractor with Twilight Nano Mount provides users with a powerful observational platform for viewing the Moon, planets, and bright deep-sky objects.

Its 102mm (4") aperture gathers enough light to see lunar and planetary details and resolve distant star clusters. The doublet design uses a pairing of glass lenses separated by a cushion of air to minimize chromatic aberrations.

The OTA easily attaches to the lightweight manual Twilight Nano mount via a vixen-style dovetail plate. Although lightweight, the mount can still hold up to 15lbs of equipment. The Twilight Nano alt-azimuth mount also has a panhandle control that makes it easy to position the telescope. Supporting the mount is a full size adjustable-height stainless steel tripod that includes an accessory tray to keep eyepieces handy and provide additional stability.

This model comes with a 25mm Plössl eyepiece, a 90° diagonal for more comfortable viewing and a red dot viewfinder to aid in object location. Plus, a built-in dew shield slows moisture build-up on the objective lens and reduces interference from ambient light.

As an added benefit, each package includes an adapter that allows you to use your smartphone to easily capture and share the beauty unfolding in your eyepiece. With FirstLight, the only thing you need to provide is a desire to discover.

FirstLight AR102mm White Tube Refractor with 660mm focal length f/6.47 telescope with fully multi-coated glass; Twilight Nano Alt/Az mount; 40mm draw tube focuser; 1.25" 90° Diagonal; Plossl 25mm eyepiece; and HD132 Red-dot Finder; and Smartphone Camera adapter.

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Customer Reviews

Based on 1 review
Andy U. (Grand Junction, Colorado, United States)
Absolutely love this telescope! The glass is so clear.

ES ar102/600 with nano mount. Absolutely love it. Do wish there was info on the scope. Instructions were basic at best. Mostly pictures. The altitude does not lock down. It's all about balance. Put the explore scientific logo between the rings then push the scope forward about a inch. Will hold phone weight and not slip. Again scope is amazing. Seller is amazing! Very fast shipping. Well packed. Pics are of mars, Sirius. And the moon on a 25mm that came with it. I did split a double star in orion constellation. Blew my mind. Love it. Btw mars is crazy far away right now but I'm jacked about the picture with my cell phone.

Explore FirstLight 102mm Doublet Refractor Telescope with Twilight Nano Mount - FL-AR102600TN 812257018024

Explore FirstLight 102mm f/6.5 Doublet Refractor Telescope with Twilight Nano Mount





102 mm | 4"

Focal Length

660 mm

Focal Ratio


Field of View



Fully multi-coated

Barrel Size



36 - 45" (91.4 - 114.3cm) tripod adjustable height


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