Starlight Xpress SXVR-H694C - Manual (Page 6)

Handbook for the SXVR-H694C Issue 1 March 2012
6
Or
2) Create a ‘Pin hole’ lens by sticking a sheet of aluminium baking foil over the end
of the adaptor and pricking its centre with a small pin.
If you use a normal lens, then stop it down to the smallest aperture number possible,
(usually F22), as this will minimise focus problems and keep the light level
reasonable for daytime testing. The pin hole needs no such adjustments and will work
immediately, although somewhat fuzzily!