GSO 2" 2x ED Barlow Lens # GS22B

Our Price: $75.00
Free shipping for this item in the US Click here for more info

Continental US Customers:
All items we sell ship for free within the Continental US. Shipping will be via the cheapest shipping method which will vary depending on the items in your order. During checkout, you may also be shown other optional faster shipping choices.

US Customers in Hawaii and Alaska:
Free shipping applies to almost all products. A few large telescopes and mounts are excluded from this free shipping offer. For these items, please contact us to obtain a shipping quote before you check out using the online shopping cart.

International Customers:
Free shipping does not apply to international orders. During check-out, you will be presented with several shipping choices and costs. However, the export of some items may be restricted outside the US due to size or manufacturer restrictions.

In stock (10+ Available)
Ships by Next Business Day
Our Product ID: OBAR-GS-GS22B
Manufacturer SKU: GS22B
Item Can Ship: Worldwide
GSO 2" 2x ED Barlow Lens # GS22B

More Views

  • GSO 2" 2x ED Barlow Lens # GS22B
  • GSO 2" 2x ED Barlow Lens # GS22B

Quick Overview

  • GSO's 2" 2x achromatic Barlow increases the magnification of each eyepiece and effectively doubles or triples the number of eyepieces at your disposal
  • Full unit increases magnification of eyepiece by 2x
  • Barlow element can be separated from main tube and threaded directly into a 2" eyepiece for approximately 1.5x increase in magnification
  • Two-element, fully-multicoated lenses with excellent color correction, sharpness, and image brightness

Product Details

GSO's 2" 2x ED Barlow is perhaps the best barlow of its kind on the market today, and one of our perennial best-sellers. This barlow uses two-element, fully-multicoated lenses made from special ED (Extra-Low Dispersion) glass for excellent color correction and sharpness. The lens edges are blackened to maximize image contrast. The clear aperture is 37mm so you can use even 2" wide-angle eyepieces without vignetting.

The body is precision CNC-machined from aluminum and sports a handsome finish that you would usually find on much higher priced items. The barlow comes with a 2"-1.25" adapter so it can be used with 1.25" or 2" eyepieces. The barlow tube and the 1.25" adapter both feature brass compression rings so the set-screw will not scratch your eyepiece barrels.

A really nice feature of this GSO barlow is that the barlow element is housed in a separate metal cell at the bottom that can be unscrewed from the upper tube (see photos). You can then screw the barlow cell directly into 2" eyepieces with a standard 2" filter thread to increase the magnification of that particular eyepiece while still maintaining a low profile. When screwed into an eyepiece, the barlow will yield approximately 1.5x of magnification. So, for example, a 30mm eyepiece can be used with the barlow element screwed on as a 20mm eyepiece, or with the complete barlow as a 15mm eyepiece. That's like having three eyepieces in one! You can also use the tube by itself without the barlow element as a 27mm (1.1") extension tube for 2" eyepieces and accessories.

Note that the use of any optical element like barlows and focal reducers changes the focus point of your telescope, requiring additional in-focus or out-focus travel. This GSO 2" 2x ED barlow will require at least 19mm (0.75") or more of additional in-focus travel. The exact amount of focus travel required will depend on the optics and mechanics of your specific set-up (telescope, diagonal (if used), barlow, and eyepiece). Hence, be aware that you may not be able to reach focus with all eyepieces or in all configurations with a given barlow.

Specifications:

  • Barrel Size: 2 inch (50.8mm)
  • Magnification Factor: 2x
  • Coatings: Fully multicoated, Blackened lens edges
  • Weight:13.7oz
  • Height (Total):116mm
  • End Caps: 2
  • Other: Includes 2" to 1.25" conversion adapter with brass compression ring
  • Made in Taiwan

Product Questions & Answers

No questions yet. Be the first to Ask a Question.

You May Also Be Interested In...

GSO 2" SuperView Eyepiece - 42mm

GSO 2" SuperView Eyepiece - 42mm

Our Price: $70.00
Agena 1.25" Cheshire Collimating Eyepiece for Newtonian Reflectors

Agena 1.25" Cheshire Collimating Eyepiece for Newtonian Reflectors

Our Price: $29.00
GSO 1.25" Plossl Eyepiece - 15mm

GSO 1.25" Plossl Eyepiece - 15mm

Our Price: $31.00
Blue Fireball 2" Spacer Ring with 1" Extension  # S-2D

Blue Fireball 2" Spacer Ring with 1" Extension # S-2D

Our Price: $20.95