Similar to the SCTM-M-LR, this locking-ring adapter not only connects the Custom-Wheel to any device having a female T-Thread eg Apogee or SBIG CCD camera, but has an internal thread to take a permanently installed 1.25" filter, eg IR-Blocker. A virtually identical adapter is available (SCTM-M42M-LR) with a 'Pentax' M42 x 1.0 thread to attach devices with a M42 x 1.0 female thread, eg SX CCD cameras. Note that the LOCKING RINGS are available separately as LR-T or LR-M42.
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