Current TEC APO110FL Setup Notes: The TEC APO110FL, f/5.6 oil spaced triplet refractor. This design uses the CaF2 fluorite for it’s internal optics that provides excellent color correction. Attached is the TEC field-flattener that brings it to f/5.73 630mm, the FLI Atlas focuser, OAG, the S-BIG St-i guider, the FLI CFW 1-8 filter-wheel and the FLI-MLx694, that gives me a FOV of 55 x 68 arcmin. I can also attach the FLI-PL16803 that has a FOV of 200 x 200 arc-min. This is all sitting on an Astro-Physics Mach-1 GTOCP4 and an ATS 8x36 tripod. . .