Built to be basic yet powerful, the FirstLight 150mm f/5 Reflector Telescope OTAis a portable observation platform that delivers bright and detailed views of the moon and planets, with the ability to resolve brighter deep-sky subjects.

Its Newtonian reflector design has a rack-and-pinion focuser placed at the front of the optical tube and adjustable mounting rings that allow users to place their eyepiece in the optimum position for viewing. A large aperture and a relatively short focal length produce a fast f/5 focal ratio to improve resolution and sharpness, while reducing exposure times during astrophotography.

Offered here without a mount or tripod, this version of the FL 150mm reflector is ideal for users who already have a reliable support system and are looking to add to their observation arsenal, or for those building an a la carte rig. The included cradle ring assembly has a standard Vixen-style dovetail bar that makes it compatible with a wide variety of mounts on the market. Explore Scientific includes several accessories, including a 25mm eyepiece that yields 30x, a universal smartphone eyepiece adapter for easy astrophotography, and a wide-field unmagnified red-dot finderscope.

150mm Newtonian Reflector OTA    750mm Focal Length, f/5 Focal Ratio    Fully Multi-Coated Optics    1.25" Rack-and-Pinion Focuser    Cradle Ring with Vixen-Style Dovetail    1.25" 25mm Plössl Eyepiece    Red-Dot Finder with Bracket    Universal Smartphone Digiscoping Adapter    OTA Only—Mount & Tripod Required

• Large 150mm (6") primary mirror gathers a vast amount of light for deep sky viewing without the weight of a complicated refractor lens system
• Fast f/5 focal ratio makes the scope an excellent platform for astrophotography
• Short 760mm focal length helps to produce the fast focal ratio and keeps the scope short for easy portability
• Newtonian reflector design overcomes the aperture limitations of lens systems to provide a lightweight optical tube assembly (OTA) that can gather copious amounts of light
• Fully multi-coated optics improve light transmission to limit loss and diffraction, delivering accurate colors and crisp resolution
• Sturdy rack-and-pinion focuser with tension control knob
• Circular drawtube with 1.25" holder

• Optical tube only; mount and tripod required for proper use
• Cradle ring assembly allows the orientation and position of the scope, relative to the mount, to be adjusted for proper balance and to prevent interference with equipment or cables
• Vixen-style dovetail bar is compatible with a wide variety of mounts on the market, including Alt-Az, EQ, and GoTo
• Integrated carry handle adds security and safe handling during setup and breakdown
• Weight of 18 pounds

• 1.25" 25mm eyepiece yields 30x magnification
• Universal smartphone adapter attaches over eyepiece for astrophotography
• Unmagnified red-dot finderscope allows for fast subject acquisition and star-hopping techniques; mounting bracket included

Related Questions and Answers

Q: 1. I own the Celestron Nexstar 4SE and wondering if I can use my tripod with this OTA?

A: Probley not. Your tripod head would have to be able to accept Long Vixen-style dovetail plate.

Q: 2. 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: 3. What type of finder scope and diagonal are required to use this scope? As in, what are the specifications to purchase the right items to fit on the scope?

A: On the diagonal. You have to decide on 45 degrees or 90 degrees. also a regular diagonal or an erecting prism diagonal. When you look through a telescope the view is always inverted with out the use of some kind of erecting device. B&H most popular finder scope is the Celestron StarPointer Finderscope BH #CEFSSP • MFR #51630 https://www.bhphotovideo.com/c/product/202036-REG/Celestron_51630_Star_Pointer_Finderscope.html https://www.bhphotovideo.com/c/product/202036-REG/Celestron_51630_Star_Pointer_Finderscope.html

Q: 4. What is the manification?

A: The Explore Scientific FirstLight 150mm f/5 Reflector Telescope (OTA Only) BH #EXFLN150750 • MFR #FL-N150750 has a 750mm Focal Length, f/5 Focal Ratio Magnification will be determined on the millimeter of the eyepiece being used.

Q: 5. Is this a Bird Jones design?

A: Explore Scientific does not indicate if the Explore Scientific FirstLight 114mm f/4.3 Reflector Telescope BH #EXFLN114NT • MFR #FL-N114500TN has a spherical primary mirror in place of a parabolic one, with spherical aberrations corrected by sub-aperture corrector lens usually mounted inside the focusser tube or in front of the secondary mirror.

Q: 6. they are making shipments to Mexico?

A: B&H will ship the iOptron Photron 150mm f/9 Ritchey-Chrétien Catadioptric Telescope (OTA Only) BH #IO6111 • MFR #6111 to Mexico via DHL

Q: 7. Thanks for the detailed answers so far. I consider replacing my Celestron slt5 (similar to 127 sllt but Shmidt Casagrian) with this tube (150 RC f/9). Howwvar I am not sure if I'll have a significant improvement in visible result. Though I ma tempted for the doual speed focuser. Can you lease advice?

A: You will have about a 17 to 22% increase in brightness. The brighter the scope the more objects can be seen and identified.

Q: 8. 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: 9. 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: 10. 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