(A) A 2PFM-SCTM adapter connects a JMI NGF-S focuser to a f/6.3 reducer. (B) A SCT-LR, locking ring , screwed directly onto the f/6.3 reducer with the Custom-Wheel screwed directly behind, locks the Custom-Wheel at the correct angular position. Note that this LR can be use without a focal-reducer, screwing directly onto the visual back of a SCT. (C) A 'Drop-down' adapter converts to M42x 1.0 thread. (D) A T-Ring , which enables rotational adjusment between Custom-Wheel and CCD camera, connects to (E) A M42B adapter , which enables a permanently-mounted IR-Blocking filter to be installed Note that (C)/(D)/(E) can be replaced by a single-piece adapter with locking-ring (SCTM-TM-LR) , with around 8mm spacing only, also including provision to install an IR-Blocking filter
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