Quote:
Originally posted by Bazooka
Wow that was a confusing read. So let me try to get this straight. The Bintel and Andrews are the same Guan Sheng items, right? The 2 different part numbers shown on the Andrews sight for both the 10" and 12" Dob scopes is one is a plate glass lens where as the other more expensive is for a BK7 lens? This would explain the 'BK7' in the part number. Obviously the BK7 is a better option so I suppose I should look more towards this.
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Yes, the Bintel and Andrews scopes are the same scope. Unless you are in a cold location it won't really matter which glass you use.
Quote:
Originally posted by Bazooka
Are the focusers different or not? Quite confused here. And is there an option of a cooling fan or not? So much conflicting information????
Also what is centre spotted?
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Yes, the Focusers are different. The rack and Pinion standard version is a simple design and is prone to wobbles etc. The Crayford has smoother action, a clutch type device, a lock to hold focus and is better quality.
The option of a cooling fan depends on the size scope you get. I don't think all the sizes have this option but you can make one if you want one. I think It only comes on the 12" Deluxe.
But, the 12" Deluxe has the works. BK7 glass, cooling fan, Crayford Focuser, centre spotted mirror and the inside of the tube is already painted Matt Black (important).
I cannot say for sure if the GS 10" Deluxe has ALL the features but you could ring them and ask. The price difference between the Standard and the BK7 CRF version is only $50 on the 10" so I would guess it doesn't have ALL the trimmings.(just a guess though).
If you get a mirror that is not centre spotted and you want to do it yourself 'BEWARE!!' The mirror surfaces cannot be touched. AT ALL! The Aluminium surface is only .003248mm (5 light-waves) thick and the protective coating on most mirrors is only .000162mm (1/4 light-wave) thick. If you touch it and leave a finger-print do not try to rub it off. The coating WILL get damaged. When the time comes to clean your mirrors (not often luckily) we can guide you through the process.
Now that I have cleared some of the confusion, I will confuse you more. Save up heaps and get an SCT with Go-To.
