Focuser extensions of various lengths are often used to create the necessary distance for proper spacing of field lenses to imager; the required distance will vary depending on camera specifications. All are black anodized aluminum with anti-reflection threads for maximum contrast. Designed specifically for the Televue Imaging System (is) 2.4" focuser.
This set of 6 Accessory Tubes is a complete set of the tubes/spacers described above. This allows great versatility in achieving the necessary distance for proper spacing of field lenses to image plane.
Televue Product Number: TLS-2245