Focusing Lens Tubes
Focusing Lens Tubes
The extension and focusing lens tubes allow one to adjust the lens tube system more easily with longer focal lengths and relative axial translation.
- Accommodate longer focal lengths
- Allows axial translation of one group of lenses relative to another
- Sizes for 12.7, 25.4 and 50.8 mm diameter lenses See All Features
| Compare | Description | Drawings, CAD & Specs | Avail. | Price | ||
|---|---|---|---|---|---|---|
 | LT05-EX Focusing and Extension Lens TubesExtension, Lens Tube, 0.5 inch LT Series, 6 in. Length | |||||
 | LT05-F Focusing and Extension Lens TubesFocusing Lens Tube, 1/2 inch diameter lenses | |||||
 | LT10-EX Focusing and Extension Lens TubesExtension, Lens Tube, 1 inch LT Series, 6 in. Length | |||||
 | LT10-F Focusing and Extension Lens TubesFocusing Lens Tube, 1 inch diameter lenses | |||||
 | LT20-EX Focusing and Extension Lens TubesExtension Lens Tube, 2 inch LT Series, 6 in. Length | |||||
 | LT20-F Focusing and Extension Lens TubesFocusing Lens Tube, 2 inch diameter lenses |
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.
