SecureFit to SBIG FW8G-STT adapter. This adapter attaches to the SBIG FW8G Self Guiding filter wheel or the OAG-8300 guider. Thickness = .55″.
According to SBIG this adapter also fits the following:
SBIG Aluma FW8S-Aluma filter wheel for SBIG ALUMA CCD cameras
SBIG StarChaser SC-2 off-axis guiding camera
SBIG AO-8A adaptive optics
SBIG STC-428-P camera package with attached filter wheel