Autoguiding Dsi





Ok then, so some details of the construction... Key ingredients:

  • A4 sheets of white 5mm foam board
  • A4 sheet of 3mm frosted perspex
  • 4 white LEDs
  • White greaseproof paper - not the nasty brown stuff.
  • 2 Ping pong balls
Essential tool: Hot glue gun Only just got one of these and it's AWESOME!

So start of by cutting the foam boards so that they become squares. Stick them together to make a cube with an open side (of course! ).

The diffusers are made by cutting the ping pong balls in half, which can be tricky, so it's best to have some spares for mistakes... Cut out circular bits from the left over foam board to back the diffusers, make a small hole in the foam board back to thread the LED wires through. Then hot glue the two parts together, with the LED enclosed inside the ping pong half and the foam board. Make 4 of

Then I made a foam board cross from one of the left over bits, to which I hot glued the 4 diffusers to the tips of. This cross is then affixed to a foam board pillar so that the light sources are raised up from the bottom of the lightbox, lighting downwards.

Above the "lighting rig" I positioned the greaseproof paper diffuser, just a square sheet stuck in in a flat-ish manner. This was added as without it there was a dark cross created by the lighting rig showing through the main perspex diffuser...

Then finally the cut sheet of perspex is stuck to the top.

Hopefully these pictures will make things clear...? Easy eh?

3d view:


Top view:


Side view:
Il y a celle-ci qui est très bien aussi:

http://www.astronome.fr/produit-lune...tares-793.html

Avec des anneaux de guidage Orion à 25 euros c'est impeccable. f/D légèrement plus grand que la Orion donc moins de chromatisme, en rajoutant un ir-cut voire un fringe killer on gagne encore un bon coup. Avec la DSI II tu as énormément de sensibilité, tu auras toujours des étoiles dans le champ.

Mon, 15 Feb 2010 20:59:42 +0000 | Hanover Auto Wreckers