Quote:
Originally Posted by erick
Put your money in the bank and wait for the AUD to rise further - your buying power will go up.
Learn a lot more with the 8". Much easier to learn on an 8" then on a 12" - I know.
In my Falcon, I would have to remove one rear internal door trim to fit the tube across the seat. You could buy a Hummer?
A 4mm GSO plossl? Paperweight value only, I think. I found the eye relief in the 6mm too small so you must have your eye jammed against the eyepiece?
Yes, the Televue plossls or Vixen LV (better eye relief) - try the second hand market - put out a "Wanted".
Sounds like you were observing Jupiter too low. It is at opposition on 15th so is directly overhead around midnight. However, with a dobsonian mount, it is a struggle to observe at 90 deg elevation, until you learn some tricks (1. - grab the dob base with your spare hand to rotate in Azi. 2. - prop the base base up on one side so the base points to 70-75 deg elevation). Anywhere above about 70 deg should reduce the air column you are looking through.
Your dob may already have an end cover with a reduced aperture hole. Is there a 5-7cm cap that pulls off to leave a hole? Try that - just move the hole to where it isn't over an arm of the spider.
And you have to check that collimation!
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Wait? What is this waiting concept? Free money coming!
I should point out, I wasn't going to drop big bucks, really, by my math I could upgrade for very little outlay - given that I have a brand new skywatcher 8 to sell (that I paid only 500 in the first place for). If I can't get a 12 GSO in my car, though, that might be scuppered as I am not so desperate to part with money for a 10.
I believe I do have an endcover with reduced aperture hole, actually. Now that I think of it. I will try it.
On getting it pointed at 90 degrees, no significant difficulties, I have definitely seen Jupiter when directly above. Didn't help that much, just a bright ball with two faint brown stripes, unfortunately. No real troubles moving the assembly, atall, actually, understandably quite difficult to nail Jupiter in a 4mm eyepiece, but aside from that, I've not suffered too much.
On the eyepiece, I'm sure it would annoy many, but I'm fairly lucky in that sense and I had no significant difficulties looking through it but yes, I'm pretty sure the concept of eye relief doesn't exist, looking through it. It doesn't seem to be an issue with me. Young eyes perhaps?
According to the manual, lack of collimation would show out of focus stars as out of sync decreasingly small circles? I don't really get that, I seem to have centered, as prescribed by the manual, hence, whilst I mention it, as far as I could tell, it wasn't wrong.
Just looking for online hummer store? Anybody got a link?
To me, if I'm already grasping for EP's, it would seem I would be better off first upgrading the base assembly (scope)
EDIT: is it possible that I might need a shroud?