Newbie

Don't be shy! If you're just starting out, here's the place to ask that first question

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tariq_malik
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Newbie

Post by tariq_malik »

Can I say hello,

I am very new to this and a fair weathered telescope user, I have no idea what the term is for someone like me. I have always had an interest in "star gazing". Even as a young lad in the 70s, friends and I would nip out with a telescope. my wife has bought me a refractor for my 40th and for my 50th birthday. I have belatedly picked up a larger reflecting telescope.

I am in Northampton and any advice is really welcome.

Thanks
Tariq
David Frydman
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Post by David Frydman »

If you look at a link above to the Federation of Astronomical Soceties it gives two societies in Northants.
If you went along to one of them you could meet fellow astronomers.
They may have observing sessions or could give advice.

What size and type are your two scopes?

Regards, David
Brian
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Post by Brian »

Dear Tariq, welcome to the SPA Forum :)

From your introduction, I'm guessing you have had some good practical experience using your telescopes over the years. Of course we will be most glad to help with advice, but I think we need specific questions to answer if we are to be truly helpful,

Regards,
Brian
52.3N 0.6W
Wellingborough UK.

254mm LX90 on Superwedge, WO ZS66SD, Helios 102mm f5 on EQ1, Hunter 11x80, Pentax 10x50
ASI120MC Toucam Pros 740k/840k/900nc mono, Pentax K110D
Ro-Ro roof shed
tariq_malik
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advice

Post by tariq_malik »

Morning Brian and david, thanks for the replies. To be honest I think if you all were to assume I was a total newbie then we would not go far wrong. I have picked up a "dodgy" 12" reflector, it came with an even dodgier finder scope and a 25mm eye piece.

I will try and post a picture of the scope and "mount" in the hope that someone can offer me advice as to what I can do with it, other then binning it! :?
David Frydman
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Post by David Frydman »

What is the focal length or at least the length of the 12 inch scope tube?
How dodgy is it?
What kind of mount? Dobsonian, alt/azimuth,equatorial?
Motor?
Is the mirror coating O.K. and the small secondary coating?
Open or closed tube?
Is the 25mm a Plossl?
Assuming it is 5 feet long tube, the magnification is about 60x.
Home made or commercial?
Any names or markings?
Sometimes dodgy scopes can turn out to be excellent, sometimes poor or bad.

Regards, David
tariq_malik
Posts: 8
Joined: Tue Apr 10, 2012 3:01 pm
Location: Northampton
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Post by tariq_malik »

I have just regsitered on Keep and Share. The link for the scope is below hopefully you can see it.

[img]http://www.keepandshare.com/userpics/t/ ... 1334138447[/img]
David Frydman
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Post by David Frydman »

Dear Tariq,
I am not computer literate and could not get to the site via your ref.
So I was not able to see the scope.

Regards, David
David Frydman
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Post by David Frydman »

It looks about f/6.
Is the tube aluminium or plastic?
It should work, of course without the 3 legged stool.
If it needs raising something more substantial is needed
If it is about f/6 the tube will be roughly 6 foot long and the mirror 70 inch focal length giving 70x approx.
Have you actually measured the clear aperture of the mirror?
Is it a full 12 inches across?
Does it have any means of collimation 3 or 6 screws near mirror.
Try it on the Moon or Saturn or the central belt of Orion or the Pleiades.

If you get someone from a local astro society they could be more hands on.

Regards, David
tariq_malik
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Joined: Tue Apr 10, 2012 3:01 pm
Location: Northampton
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Thanks

Post by tariq_malik »

Hello David,

Thanks for the information, it is aluminium and there are 3 screws at the bottom. I am reading up on collimation. I was hoping that I would find out from people on here about a decent mount, assuming this was not a DIY telescope. I have looked up the local astronomy group and hope to be joining up with them.

When I picked it up I was told that the focal length was 52", the mirror diameter is actually 12"

Thanks
Tariq
David Frydman
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Post by David Frydman »

It is a Dobsonian, although the altitude bearing looks a bit small.
It seems basically complete and should work as is, but I don't know if it is smooth in azimuth or altitude.
It may need a little work, but it should give views as is.
As your daughter maybe small it might be O.K. with the eyepiece low and not need raising.
A small elbow finder could help.
You could remount it, but I don't know if it is worth it.

Try it.

If you point it at Polaris you can test it without needing to move it.
Polaris is about 53 degrees up in the north.

Regards, David
phillj
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Post by phillj »

Hello tariq and a warm welcome to SPA.

phillj
skywatcher Explorer-130PM f/900
7x50 10x50 binoculars
tariq_malik
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Hi

Post by tariq_malik »

Hello Phil, thanks for the welcome. How are you?
David Frydman
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Post by David Frydman »

The tube looks good maybe an adapted professional tube and optics.
The mount is handmade but could be O.K. as Dobsonians are not that difficult to make and are simple and can work well.

It looks longer than 52 inch focal length.
What is the length of the tube and/or the distance approximately from the main mirror to the diagonal centre. Don't touch the mirrors.
Are the mirrors reasonably bright and reflective.

It should work O.K. with the supplied eyepiece and if it turns out O.K. you need another eyepiece maybe around 12mm, depending on the true focal length.

Is the eyepiece clean and free of fungus? shine a bright torch into it.
Is the inside of the tube free of mould?

regards, David
tariq_malik
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Joined: Tue Apr 10, 2012 3:01 pm
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Post by tariq_malik »

:) The tube does look good and the secondary mirror is clean tidy, the primary looks like there is a fine cover of dirt and could do with a clean, there is a dot on it so someone may have performed collimation.

I think it maybe a good buy but the mount is the big issue here, nothing I am going to jump in and try to resolve right now as I want to enjoy the simple stuff first and just enjoy the planets, moon etc. I am trying to read up on things before trying to change things.

Regards
Tariq
tariq_malik
Posts: 8
Joined: Tue Apr 10, 2012 3:01 pm
Location: Northampton
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Advice

Post by tariq_malik »

PS it is all tidy no mould, rust etc, physically it all does look good, asthetically it will not win any prizes.
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