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Re: Thread pitch..

 

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Maybe, though I don¡¯t think the Losmandy adapter will fit there so I think it has to go in a different set of holes.. If you look at the guidescope rings, the image shows 4 sets of adjustment screws.. It is also drilled to use only three sets.. So there are seven adjustment holes that are all the same size.. Once the rail is on, I would be attaching the adapter.. The adapter is the same as the base of the guidescope rings.. i.e. remove the rings and what is left is the adapter..

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Probably will have to use the ¡°side¡± holes.. Let¡¯s see if I can attach an image in this group.. The empty ¡°side¡± holes are easily seen..

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Derek

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From: [email protected] [mailto:[email protected]] On Behalf Of Brian Valente
Sent: Thursday, January 02, 2020 8:21 AM
To: [email protected]
Subject: Re: [Losmandy_users_io] Thread pitch..

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Derek where do you want to add a rail - on top of the guidescope rings?

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On Thu, Jan 2, 2020 at 8:12 AM Derek C Breit <breit_ideas@...> wrote:

Besides, why do you care about the thread if you are unwilling to remove one?

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Because I want to put more bolts into the existing ¡°extra holes¡± to add a Vixen rail.. But yes, I will try your suggestion and remove one from the middle ring.. If my focuser and extension tubes are tight, it should stay put.. Nice idea, Thanks!

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Derek

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From: [email protected] [mailto:[email protected]] On Behalf Of Mark Christensen
Sent: Wednesday, January 01, 2020 10:13 PM
To: [email protected]
Subject: Re: [Losmandy_users_io] Thread pitch..

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Derek,

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Remove just one screw, noting the tension with a precise instrument ¨C the human hand.

Then take it to a DIY or Ace store as suggested by one of our other friends. When you get back to the mount insert that one screw in the ring and tension it as much as you had before.

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Since the other two screws in that ring (not to mention the three in the other ring) weren¡¯t changed the boresight (to use the proper artillery term) of the guidescope won¡¯t have changed significantly.

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The difference in boresight alignment (main vs. guidescope) will be trivial, unless you are trying to keep things within arc seconds. I know of no reason worry about that unless you are shooting very long exposures with poor polar alignment.

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Besides, why do you care about the thread if you are unwilling to remove one?

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Mark Christensen

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Virus-free.


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Brian?

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Brian Valente

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