Special Features

[PACKAGE DETAILS] You receive one M54x75 length extension tube tailored for telescope photography; choose from lengths ranging 3mm to 50mm to match telescopes, cameras and flatteners in your rig.
[PRECISION FITTING] Machined M54x75 internal and external threads tight, repeatable connections and allow stacking multiple tubes without introducing tilt or misalignment.
[OPTIMAL BACK FOCUS ADJUSTMENT] Fine-tune the spacing between sensor and optical elements to reach focus with field flatteners, MPCCs, filter wheels or reducers, helping minimize vignetting.
[LIGHTWEIGHT BUILD] Constructed from anodized aluminum with matte finished threads to limit internal reflections and keep assemblies light; length specific weight ranges from about 5g up to 200g.
[RECOMMENDATIONS BEFORE PURCHASE] Designed for telescope photography setups and imaging rigs; verify all components use M54x75 threads and select the combined tube length that matches your required back focus.

Description

Features:
* Anodized aluminum with matte-finished internal threads effectively reduces glare; the Length Extension Tube features M54×0.75 internal and external threads for a secure and durability connection.
* Addresses insufficient back focus distance: This Length Extension Tube extends the distance between the lens and camera, making it suitable for telescopes, lenses, MPCCs, guide scopes, and other devices, making sure optimal focus.
* M54×0.75 internal and external threads allow for secure stacking of washers and adapters; the Length Extension Tube maintains optical alignment for clear astronomical imaging.
* Available in multiple sizes: 3mm/5mm/7mm/10mm/12mm/15mm/20mm/30mm/40mm/50mm, meeting varying back focus requirements.
*Ideal for astronomical photography setups: Use the Length Extension Tube with a focuser, field flattener, or filter wheel to finely adjust the spacing for , low-vignetting images.

Specifications:
*Product Name: Length Extension Tube for Astronomical Telescope Photography
*Material: Aluminum
*Size: approx.
Internal Thread: M54 x 0.75mm
External Thread: M54 x 0.75mm
Length: 3mm/5mm/7mm/10mm/12mm/15mm/20mm/30mm/40mm/50mm
*Color: Black
*Weight: approximately 5g-200g

Package Contents:
1 x Length Extension Tube