Saturday, 13 April 2013

Moving the mirror on the SkyWatcher 130M

My SkyWatcher 130M telescope needs a little help to reach prime focus with a DSLR camera (see also this great blog post). So I decided to move the primary mirror up the tube to allow my Canon EOS to reach focus when attached directly to the T-ring for prime focus astrophotography. This involved almost completely dis-assemblying it, playing with new nuts and bolts, then putting it back together.

I started by removing the spider and secondary mirror assembly, which are held by four recessed screws and nuts on the inside (which should not be dropped onto the primary mirror):
Four screws hold the SkyWatcher 130M spiderSkyWatcher 130M (SK1309EQ2) secondary mirror