For Sale: William Optics Flat 4 adjustable field flattener
Details on what version this is and its resulting specs can be found here:
http://www.iceinspace.com.au/forum/s...ad.php?t=45822
360 degree rotatable with thumb screw to lock rotation, helical adjustment for reduction factor
Selling this one cheap. Condition is good, with minor scratches on its cannon sized barrel.
$100 shipped in Australia, PayPal or Bank Transfer