ZENITHSTAR 81 WIFD F/6.9 APO DOUBLET DayStar so it is advisable to

so it is advisable to use insulating tape at least on one of the two connections

5" field flattener to telescope focusers which have female M63 x 1 threads

1 male to male cable is included for use with power distribution units like the WandererBox series

Both male M68 x 1 and female M68 x 1 caps are available

ZENITHSTAR 81 WIFD F/6.9 APO DOUBLET DayStar so it is advisable toThe William Optics Zenithstar 81 WIFD is a game changing new two element apochromatic refractor featuring a patented internal focus design. The WIFD series has been designed from the ground up to support the latest large and heavy high resolution cooled cameras and accessories. The focuser movement is integrated inside the main OTA, so no external focuser drawtube is needed. This will reduce tilt caused by focuser sag and mechanical flex and lessen