Compare Model Drawings, CAD & Specs Optic Diameter Adjustments Thread Type Length Availability Price
Extension, Lens Tube, 0.5 inch LT Series, 6 in. Length
$58
In Stock
12.7 mm Fixed 0.535-40 155.4 mm
In Stock
Focusing Lens Tube, 1/2 inch diameter lenses
$34
In Stock
12.7 mm Z 0.535-40 26.7 mm
In Stock
Extension, Lens Tube, 1 inch LT Series, 6 in. Length
$52
In Stock
25.4 mm Fixed 1.035-40 155.4 mm
In Stock
Focusing Lens Tube, 1 inch diameter lenses
$34
In Stock
25.4 mm Z 1.035-40 26.7 mm
In Stock
Extension Lens Tube, 2 inch LT Series, 6 in. Length
$68
In Stock
50.8 mm Fixed 2.035-40 155.4 mm
In Stock
Focusing Lens Tube, 2 inch diameter lenses
$58
In Stock
50.8 mm Z 2.035-40 39.4 mm
In Stock

Features

Focusing Tubes

LT-F-series Focusing Tubes are provided to allow axial translation of one group of lenses relative to another. The focusing tube is simply a lens tube with a longer external thread and a locking nut. Provided in 1/2-, 1- and 2-inch diameters, the focusing tube screws into the internal threads of a standard lens tube and is locked in place with the lock nut. The maximum focusing range is 0.39-inch for 1/2- and 1-inch diameters and 0.89-inch for the 2-inch diameter version. A lens retaining ring is also included with each focusing tube.

Extension Tubes

LT-EX-series Extension Tubes are used for optical systems with longer focal lengths. Made in 6-inch lengths, Extension Tubes have all the same features as standard lens tubes except that the depth of the internal threads is only 1 inch. A lens retaining ring is included with each of these Extension Tubes.

Lens Tube Accessories