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MSammon

What finder arrangement do you use with dobs

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Straight through finder and turn the map upside down. I can't get my head around the view through an ordinary diagonal.

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+1 for a telrad or rigel plus a 9x50 raci finder. I use this set up the vast majority of the time. I'll skip the 9x50 only if I don't need to do long star hops.

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On 13/07/2019 at 20:35, JOC said:

Finders2.thumb.jpg.6d6fcefa103f06bcca8a77a14295e051.jpgFinders1.thumb.jpg.8ea5e155ea3d113b69e63371892ad3cf.jpg

 

With the arrangement above I can land on anything I can see by eye in about 20 seconds flat.  The RDF doesn't even need to be completely aligned because if the optical finder is aligned with the scope a thereabouts find in the RDF puts the star within the optical finder and then landing on the optical finders crossed hairs puts the star into the telescope.

Which finders are they? And that double attachment please?

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Its a Skywarchet right angle correct image (RACI) finder, a Celestron cheap and cheerful red dot finder and a dual finder mount for a Skywdtcher attachment off ebay for £8 sent all the wsy from Poland by a guy that 3D prints them.  Though you can buy more expensive  versions from the various big telescope houses.  I went from wasting whole sessions to being able to land on snything I can see with the the naked eye in about 30 seconds flat.

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2 hours ago, JOC said:

Its a Skywarchet right angle correct image (RACI) finder, a Celestron cheap and cheerful red dot finder and a dual finder mount for a Skywdtcher attachment off ebay for £8 sent all the wsy from Poland by a guy that 3D prints them.  Though you can buy more expensive  versions from the various big telescope houses.  I went from wasting whole sessions to being able to land on snything I can see with the the naked eye in about 30 seconds flat.

That’s great. Have you ever tried a illuminated Raci like the Celestron?

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On 18/07/2019 at 01:09, MSammon said:

That’s great. Have you ever tried a illuminated Raci like the Celestron?

Nope, when I finally found something that worked I stopped looking.  A good tip is to dial in the raci during the day (point away from the sun at a distant object) then it shouldn't need illuminating to use it at night.  Your eye is pretty good at telling when the required object is in the middle of the finder.  As I noted it doesn't even matter if the rdf. Is not quite centred as long as the raci optical is as I find that once I know how much the raci might be off by the desired object is usually in the fov of the optical finder anyway.

Edited by JOC
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