Compare Model Drawings, CAD & Specs Optic Diameter Adjustments Length Thread Type Availability Price
Extension, Lens Tube, 0.5 inch LT Series, 6 in. Length
$55
In Stock
12.7 mm Fixed 155.4 mm 0.535-40
In Stock
Focusing Lens Tube, 1/2 inch diameter lenses
$33
In Stock
12.7 mm Z 26.7 mm 0.535-40
In Stock
Extension, Lens Tube, 1 inch LT Series, 6 in. Length
$49
In Stock
25.4 mm Fixed 155.4 mm 1.035-40
In Stock
Focusing Lens Tube, 1 inch diameter lenses
$33
In Stock
25.4 mm Z 26.7 mm 1.035-40
In Stock
Extension Lens Tube, 2 inch LT Series, 6 in. Length
$65
In Stock
50.8 mm Fixed 155.4 mm 2.035-40
In Stock
Focusing Lens Tube, 2 inch diameter lenses
$55
In Stock
50.8 mm Z 39.4 mm 2.035-40
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