The Celestron wide field, fast F/2, 8″ aperture RASA telescope is the smallest and lightest of the RASA range. This makes the telescope an ideal choice for those wanting to do astrophotography on relatively low cost medium sized mount. A set up such as the RASA 8 with the Celestron Advanced VX mount makes an ideal portable astrophotography system that is easy to take away to your favourite dark sky spot(s) to capture many deep sky splendours.
The 8” RASA model was designed for use with the increasingly popular mirrorless interchangeable lens cameras (MILC) and with popular astronomical CMOS and small CCD cameras too. Mirrorless cameras have a body which is more compact, and lighter, than a traditional DSLR. Their small size will cause minimal obstruction when attached and, alongside their sensitive imaging sensors, make these cameras a great match with the RASA 8″. Another benefit of using a mirrorless camera is that there are no power and/or data cables in the way which can cause diffraction spikes.
In order to use a mirrorless camera you will need one of Celestron’s camera adaptors for the RASA 8″.
There are two MILC adaptors available: one for Canon cameras,
and one for Sony cameras.
- are made so that the camera’s sensor is placed at the precise backfocus distance for best image quality.
- Are similar in appearance to the T-2 and C-thread camera adaptors supplied as standard with the RASA 8, except of course they use the brand-specific camera bayonet mount for camera attachment, and are secured to the RASA lens group cell with the knurled retaining lock ring.
- Have three slotted elongated holes to allow collimation to be undertaken if required.
- Have a small elongated hole that allows the adaptor to be removed from the camera using the (supplied) “T”-shaped tool. The pointed end of the tool is inserted through the hole which then presses the lens release button on the camera body allowing the adaptor’s removal.
Full instructions on using the camera adaptors can be found here.