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Orion OAG and focal reducer
Trying to start learning how to autoguide, so I bought the Orion deluxe OAG, to use with my LX90 8", Meade DSI II as the guider and my Canon 550D as the imaging camera. I like to take mostly DSO so would like to use a focal reducer as well.
Problem is currently I have mostly 1.25" focal reducer, filters and eyepieces, which can not connect to the Orion OAG, I will need a 2"-1.25" adapter, my questions are:
1. Do I have to always put the focal reducer at the output of the scope? In this case I guess I will need to get a 2" focal reducer is that correct? the imaging train will be as below:
LX90 -> 2" FC -> OAG -> Canon
2. Or can I get a 2"-1.25" adapter and do as follow:
LX90 -> OAG -> 2"-1.25" adapter -> 1.25" FC/filters -> Canon
3. What does it mean by "requires a minimum of 59mm inward focus travel"? In the future I plan to get a mono CCD + filter wheel etc.. will this affect my ability to focus?
LX90 -> FC -> OAG -> Filter wheel -> CCD
Thanks in advance,
Victor.
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