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View Full Version here: : 16" Meade DS f4.5 mirror for sale

Lester
26-05-2006, 01:01 PM
Hi everyone,

I have got a 16" f4.5 newtonian mirror for sale. It was new in 1980 and hasn't been realuminised in all that time. I have included a photo that shows the surface detail best.

I will accept $400.00 o.n.o plus postage.
leon
26-05-2006, 02:39 PM
Hi Lester

At F 4.5 what focal lenght would that equate to, meaning the tube could be fairly short i expect.
Do you still have the tube as well, by chance.

I have an 8 inch f 7.0 newt, and that has a focal length of approx 56 inches.

Also what is the condition of the mirror, i presume it would require re Aluminizing
stringscope
26-05-2006, 02:49 PM
Hi Lester,

I have sent you a PM.

Cheers,
matt
26-05-2006, 02:50 PM
So wouldn't fl be 16x4.5=72 inches:shrug:

or 6 foot ... in the old lingo?
Starkler
26-05-2006, 03:05 PM
I sent a pm also .
leon
26-05-2006, 03:06 PM
Me To
Lester
26-05-2006, 03:27 PM
Hi everyone,

Mirror is sold to Ian.
ving
26-05-2006, 03:36 PM
everyone want 16" dobs! gso need to pull thier fingers out :)
Starkler
26-05-2006, 05:27 PM
The real bargains go too quick :(
Vermin
26-05-2006, 07:32 PM
It was a bargain and a half.
dugnsuz
26-05-2006, 08:47 PM
Well done Ian,
Someone's going to have their aperture fever cured:rofl:
Doug:thumbsup:
astroron
26-05-2006, 10:59 PM
Great Bargan Ian:thumbsup: My 16" Dob has a F4.5 meade mirror and I have had many good hours of observing with it.
Good to see you joining intermediate Dob club:lol: :thumbsup:
stringscope
26-05-2006, 11:50 PM
Hi all,

I know I have been pretty quiet of late, family and work has consumed most if my spare time since the SPSP.

I came home from work early today as I was feeling quite unwell. To cheer myself up I logged onto IIS just to check on the latest and ........ there it was, my ultimate aim, I just had to have it:D

Thanks heaps Lester:) I can't wait for it to arrive!

I was just about to buy a 12" GSO dob for the mirror and parts for my 12" string truss dob project with the eventual aim of building a 16" version. Fortunately all I have done is cut a couple of rings for the UTA so I haven't wasted much plywood. Everything else I have will be OK for a 16" version.

I have got a couple of other scope projects coming up for CAS and I might be able to use the rings there.

Back to the drawing board now:D

BTW, Lester did indicate to me that in its previous installation star images did exhibit some assymetric flaring with increasing magnification. This might indicate some astigmatism in this mirror. I won't be able to investigate this until I have built the scope. If it does need refiguring it won't be such a good bargain but I am happy to take that risk.

Cheers,