Sporting a distinctive large aperture and deep light bucket, the Explore Scientific FirstLight 254mm f/5 Dobsonian Telescope gives users a simple yet highly effective platform. The fast f/5 focal ratio, hexagonal rack-and-pinion focuser, and the ability to detach the OTA from the rockerbox and mount it on an equatorial mount make the FirstLight a good choice for imaging. A Vixen-style dovetail plate is included for use with an EQ mount. The 2.5" focuser allows the use of both 1.25" and larger 2" eyepieces and accessories.

The heavy base provides a rock-steady platform with very low vibrations, and can be disassembled into flat sections within minutes for easy transport. Dual mounting rings allow the OTA to be precisely balanced for smooth movement. The telescope comes with a red dot finder, a red-beam flashlight with lanyard, a Tirion Double-Sided Multi-Latitude Planisphere, and a double-sided moon crater map.

Large 254mm Aperture    1270mm Focal Length, f/5 Focal Ratio    Base Disassembles for Easy Transport    OTA Can Be Mounted on EQ Mount    2.5" Focuser with Helical Gearing    Uses 1.25" & 2" Eyepieces    1.25" 25mm Super Plossl Eyepiece    Red-Dot Finder    Red-Beam Flashlight with Lanyard    Double-Sided Multi-Latitude Planisphere

• 254mm (10") aperture
• f/5 focal ratio
• 1270mm focal length
• Optical Design: Dobsonian-variant of a Newtonian reflector

• Alt-az rocker design
• Large aluminum altitude wheels allow for smooth movement and tracking with reduced vibration
• Teflon pads on ground plate enable smooth 360° rotation
• Adjustable mounting rings enable precision balancing when using lighter or heavier accessories for smoother motion
• Mounting rings allow the altitude wheels to be removed and replaced with included Vixen-style dovetail for attachment to an EQ, alt-az, or GoTo mount head for tripod/pier use

• Large hexagonal 2.5" helical rack-and-pinion design
• Provides strength and rigidity to handle heavy eyepieces and imaging rigs with little backlash, tilt, or shifting
• Includes 2" and 1.25" eyepiece adapters to allow use of a variety of eyepieces and accessories

• 25mm SPL eyepiece
• Red-dot finder
• Astro R-Lite Red Flashlight with lanyard
• Tirion double-sided multi-latitude planisphere
• Double-sided moon crater map

Related Questions and Answers

Q: 1. If it weighs 18 lbs. why does it say its Package Weight is 15 lbs?

A: A correction order has been submitted to the B&H web content team.

Q: 2. Hi, I would like to know The dimensions of the tube, the Ota, how long is the tube, please?

A: The OTA is 24.25 inches in length. 4.38 inches in diameter and weighs approximately 5.60 lbs.

Q: 3. I see the telescope comes with a 1.25" reducer adapter to accommodate 1.25" eyepieces. What is the diameter of the focuser?

A: The reducer that is part of the diagonal in this FirstLight 114mm F/4.3 Reflector Telescope is 1.25" diameter .

Q: 4. What materials are the tube and cradle rings made of?

A: Explore Scientific FirstLight 150mm f/5 Reflector Telescope has an aluminum tube and cradle rings.

Q: 5. The image from the telescope is upside down and backwards. How do I fix this?

A: You would just need to add a 90 Degree Star Diagonal. The Celestron 90° Star Diagonal (1.25") will work. Link: https://bhpho.to/3t4ZEMK

Q: 6. Is this the Generation II scope?

A: It is the second generation.

Q: 7. Is there a computerized tripod for the Explore Scientific Firstlight 130mm f/4.6 Alt-Az Newtonian Telescope?

A: The Explore Scientific FirstLight 130mm f/4.6 comes with the manual Twilight I Alt-Azimuth Mount. You could replace the manual mount with this computerized Explore Scientific iEXOS-100-2 PMC-Eight Equatorial Go-To Tracker System: https://bhpho.to/3qouVtc

Q: 8. what is its shipping box's packed weight ?

A: Unfortunately the question you're asking cannot be answered with our Q+A feature. Please contact our Sales directly for assistance.Email: Sales@bhphotovideo.com

Q: 9. Is this generation 2 telescope?

A: Yes it is!

Q: 10. what's the mount size?

A: There is no mounting socket at the bottom of the base to mount it on any tripod.