OBJECTIVE LENSES FOR TELESCOPES

These objective lenses are brand new items and will be supplied from UK stock, unless otherwise stated.
All prices are UK post free. Non-UK customers should email for postage cost before buying.

LARGE OBJECTIVE LENS. 150mm diameter Plano-Convex (PCX) lens. Very long Focal length of 2600mm - just over 8 feet. White glass, not plate glass, edge thickness 3.5mm, center thickness 4mm. Not achromatic, but the very long focal length minimises chromatic aberrations. Ideal for making a simple educational refractor or for projection projects such as camera obscura. Objective 150mm dia 2600mm FL: £39.00

LARGE OBJECTIVE LENS. 150mm diameter Positive Meniscus (PMN) lens. Extremely long Focal length of 4000mm - about 13 feet! White glass, not plate glass, edge thickness 2mm, center thickness 2.5mm. Not achromatic, but the very long focal length minimises chromatic aberrations. Ideal for making a simple educational refractor or for projection projects such as camera obscura. Objective 150mm dia 4000mm FL: £39.00

HIGH QUALITY MOUNTED TELESCOPE OR BINOCLUAR OBJECTIVE LENS 2 element achromatic. 83mm clear diameter. F4. Focal length about 320mm. Mounted in metal mount 100mm diameter, 65mm long. Weight 630 gram. Surplus item. Optically perfect. Mount haS cosmetic blemishes only, as shown. Only two of these are available as shown in the photo. 83mm f4 mounted objective: £59.00 each

LENSES FOR C/CS MOUNT CAMERAS

The lenses below are C-Mount lenses and will fit any CCTV, C or CS mount camera, like the Mintrons, Stellacam, Mallincam, etc.

Computar 12.5mm F/1.3 C-mount lens for Mintron and other CCTV Video Cameras. No lens caps are provided. With Mintron cameras: wide angle field of view of about 30 - 35 degrees. Iris of f1.3 gives a limiting magnitude of about 11 mag with the Mintrons. Length: 55mm. Threaded to accept 40.5mm filters. Used item but optically and cosmetically perfect. Made in Japan. 12.5mm f1.3 Computar Lens: £29.00

Good quality 16mm F/1.6 C-mount lens, made in Japan. Probably made for Computar, but unbranded as such. Brand new, boxed, supplied with front and rear lens caps. Length: 28mm, diameter 33.5mm. Threaded to accept 30.5mm photographic filters (30.5 x 0.5). Fixed aperture of F1.6. Made in Japan. 16mm f1.6 Lens: £29.00

50mm F1.4 C-mount Lens: £49.00 This high spec 50mm lens has a wide aperture of f1.4. The focal ratio of f1.4 ensures a view rich in stars. Field is 9 degrees (diagonal) with the Mintron camera. Limiting magnitude with the Mintron EX camera is about 13 magnitude, under clear skies. Manual iris. Dimensions: Length: 71mm. Diameter 50mm Quality lens, made in China. Brand new stock. 50mm f1.4 Lens: £49.00