travel-update.co.uk
SafeSearch Not set
user icon
cart icon 0
New Arrivals/Restock
Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads
Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

flash sale iconLimited Time Sale
Until the end
15
56
17

US$18.59 cheaper than the new price!!

Free shipping for purchases over $99 ( Details )
Free cash-on-delivery fees for purchases over $99
See all stores
Please note that the sales price and tax displayed may differ between online and in-store. Also, the product may be out of stock in-store.
Used  US$12.40
quantity

Product details

Management number 208571701 Release Date 2026/03/22 List Price US$12.40 Model Number 208571701
Category
  1. Electronics
  2. Camera & Photo
  3. Accessories
  4. Telescope & Microscope Accessories
  5. Telescope Accessories
  6. Photo Adapters
  • Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter provide extra focuser back travel sometimes needed to achieve focus with certain eyepiece or telescope combinations. More back travel is often needed for short-range terrestrial viewing or with use of a field flattener, coma corrector, or focal reducer lens. Extension tube provides extra focuser "back travel" often needed for short-range terrestrial viewing through a telescope, or for astrophotographic applications.
  • Extension tube provides extra focuser: back travel often needed for short range terrestrial viewing through a telescope; or for astrophotographic applications
  • Features two locking thumbscrews to secure any inserted astronomy accessory; with a brass compression insh to prevent the marring of your telescope accessories
  • Machined of high quality aluminum and anodized black; resistant for long time use
  • Fits in 2 inch telescope focusers and accepts 2 inch eyepieces or accessories; Threaded for use with standand 2 inch astrophotography filters
Item Weight 4.8 ounces
Manufacturer Alstar
Item model number SKU_AM_ETA250A
Product Dimensions 2.7 x 2.7 x 3.2 inches
Is Discontinued By Manufacturer No

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 50mm - with Standand 2-Inch Filter Threads

Bestseller ranking

Photo Adapters

1
Astromania M48x0.75 Female Rotation Lock Ring Telescope Adapter - Bundle with - 2 inch to M48X0.75 Adapter for Telescope Eyepiece Lens

Astromania M48x0.75 Female Rotation Lock Ring Telescope Adapter - Bundle with - 2 inch to M48X0.75 Adapter for Telescope Eyepiece Lens

★★★★☆ (10)
$15.11
2
Astromania Adaptor T2 Female Thread to 2" - Bundle with - Alignment 1.25" Next Generation Laser Collimator 2" Adaptor for Newtonian Telescopes

Astromania Adaptor T2 Female Thread to 2" - Bundle with - Alignment 1.25" Next Generation Laser Collimator 2" Adaptor for Newtonian Telescopes

★★★☆☆ (19)
$20.05
3
Astromania M42x0.75 to M42x0.75 Male Telescope Adapter - Bundle with - M42X0.75 Female to M42X0.75 Female Thread Telescope Adapter - 9mm

Astromania M42x0.75 to M42x0.75 Male Telescope Adapter - Bundle with - M42X0.75 Female to M42X0.75 Female Thread Telescope Adapter - 9mm

★★★★☆ (16)
$12.23
4
Alstar 2" Adjustable Extention Tube Camera Adapter - Bundle with - 5 Pcs Dust Caps

Alstar 2" Adjustable Extention Tube Camera Adapter - Bundle with - 5 Pcs Dust Caps

★★★☆☆ (36)
$18.80
5
Celestron T-Adapter with SCT 5, 6, 8 with 9.25, 11, 14, Black (93633-A) & 93625 Universal 1.25-inch Camera T-Adapter

Celestron T-Adapter with SCT 5, 6, 8 with 9.25, 11, 14, Black (93633-A) & 93625 Universal 1.25-inch Camera T-Adapter

★★★★☆ (6)
$25.16
6
Scope Side Camera Adapter Bracket - to Be Used with Phone - for Outdoor Scenes

Scope Side Camera Adapter Bracket - to Be Used with Phone - for Outdoor Scenes

★★★☆☆ (34)
$80.00
See the same product from Photo Adapters

Correction of product information

If you notice any omissions or errors in the product information on this page, please use the correction request form below.

Correction Request Form

Product Review

You must be logged in to post a review