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Revelation Astro T thread / M42 adjustable extension tube, Male thread one side female the other with lock ring, ideal for getting correct spacing with field Flattener or focal reducers
Product DescriptionM42 Locking rings provide a variable adjustment for precise positioning of suitable M42 (T-Thread) threaded attachments, over a thread range of 8mm. This Locking Ring has an internal female M42 thread of 5mm depth and an external male M42 thread of 10mm depth. This exterior thread features a 1.5mm depth / 5mm width locking collar, which is used to vary spacing between attached M42 threaded accessories and to provide a substantial lock when in position.
Ideal for critical adjustable spacing of T rings and T threaded accessories with astro – imaging, precision metal construction with threaded adjustability.
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Category: Cameras and Photography:Telescopes and Binoculars:Telescope Parts and Accessories:Other Telescope Parts
Location: Atherstone