Sporting a distinctive large aperture and deep light bucket, the FirstLight 254mm f/5 Dobsonian Telescope by Explore Scientificgives 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. Can I change the focuser's position to opposite side of a tube?

A: No, you cannot.

Q: 2. 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: 3. Tube dimension ??

A: The Explore Scientific FirstLight 130mm f/4.6 Alt-Az Newtonian Telescope BH #EXFLN130NT • MFR #FL-N130600MAZ01 (OTA) is about 24" X 6"

Q: 4. The description says the included 25mm eyepiece gives 40x power but spec's give the focal length as 500mm that would yield 20 power; what is correct?

A: You are correct it would be about a 20x. I have notified my web content team of the error.

Q: 5. How much does the OTA weigh?

A: The OTA from the Explore Scientific FirstLight 114mm f/4.3 Reflector EQ Telescope weighs roughly 6 lb.

Q: 6. When assembled, what is the height of the eyepiece from the ground?

A: It's surprisingly low for such a large-aperture scope. Pointed straight up at zenith, the eyepiece is at eye-height for me, 67 inches. At horizon, the eyepiece only about 20 inches off the ground.

Q: 7. how can I use my nikon DSLR camera with this telescope?

A: There are different ways to attach your Nikon camera to the Explore Scientific FirstLight 102mm f/9.8 Alt-Az Refractor Telescope BH #EXFLAR102RT1 • MFR #FL-AR1021000MAZ01 the most secure way would be to attach the Tele Vue SLR Prime Focus Camera Adapter for 2" Focusers BH #TE2CA • MFR #ACM-2000 to the rear of the scope. Attach a T-mount ring to your camera body and those (2) pieces will screw together. The T-mount or ring is specific to the make and model of your camera.

Q: 8. 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: 9. What's the weight of the tube? Thanks

A: The weight of the tube is an estimated 18 pounds

Q: 10. 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