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Andy Brown
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« on: 25-Mar-2008 21:20:48 UTC »

hi everyone...  what am i likley to be able to see with the below telescope?  I'm hoping to be able to see the Moon in severe closeup, the rings of Saturn and other such things...  But i only have a budget of £150...


EXPLORER-130 130mm (5.1") f/900 Newtonian Reflector
Magnifications (with optics supplied): x36, x72, x90, x180
Highest Practical Power (Potential): x260
Diameter of Primary Mirror: 130mm
Telescope Focal Lengh: 900mm (f/6.92)
Eyepieces Supplied (1.25"): 10mm & 25mm
x2 Barlow Lens
Red Dot Finder
EQ2 Equatorial Mount
Aluminium Tripod with Accessory Tray
30% more Light Gathering than 114mm
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brendan martin
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« Reply #1 on: 26-Mar-2008 00:33:05 UTC »

Hi Andy, you will be able to see the moon in close up and saturn, jupiter etc. you will also see nebula's and other deep sky objects. The only drawback I can see with this scope is it may be a catadioptic which can be hell to colomate, if you can go an extra £15 Stockport Binocular do the same telescope with a shorter focul length with drive motors for £165 (a better scope). I would  sugest holding off buying your first scope until you have been to Pex Hill and had a talk to a few people about the pros and cons of different types of scope (you will be able to try a few types up there, weather permitting). There is nothing worse than spending good money on a scope only to be dissapointed with the views.
see you soon
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Andy Brown
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« Reply #2 on: 26-Mar-2008 00:43:51 UTC »

Thanks, again Brendan, for the quick reply.  I did actually find that one on Stockport, its the scope above the one you were listing on the same page... 

Pay Day - Monday
Pex Hill - Wednesday (if she's up to it)
Buy Day - Saturday

It all works in sequence :-)  Just trying to get an idea of what's what before i take the plunge... 

I notice the difference in Focal Lengths between those two scopes, and i'm wondering... is it that a lower F number gives a better view?!? 

Also, a scope which is motorised, does it HAVE to use the motors?  Or can you move it manually?!?

Thanks again, and sorry for being a pain!
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The answer to the Ultimate Question, of Life, The Universe and Everything is...
Forty Two
So Long and Thanks for all the fish!
brendan martin
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« Reply #3 on: 26-Mar-2008 12:48:16 UTC »

Hi Andy, the shorter focal length is better for deep sky but will sufice for moon and planetary, the longer focal length, if catadioptic will have a lense in the focuser  ( so as to increase focal length) this can have its own problems. The motorised scope can still be used manually, one of the benefits is you can easily stay on what your viewing as once aligned it should keep the target in the eyepiece (ideal for imaging).
see you soon
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