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-   -   Astro Dovetail Standards? (https://www.birdforum.net/showthread.php?t=357934)

Hauksen Wednesday 28th February 2018 13:10

Astro Dovetail Standards?
 
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Hi everyone,

Not a directly photography related question, but maybe you could help me anyway: Is there an overview over astro dovetail standards to be found online, somewhere?

My fascination with reflex sights (red dot finders) has induced me to design a dovetail-to-NATO-rail adapter for my girlfriend's telescope, a Skywatcher Dobson.

This is a depiction of the dovetail foot I used. The actual shoe is 34 mm at the base:

Attachment 655084

What is it I designed there? :-) Probably, I found these measurements online, but I'm afraid I lost track of the source.

The 3D-printed adapter works well, and from photographs I've seen online, it doesn't seem unusual for astro dovetails to show large gaps, but I wonder if before sharing my design, I should better re-visit it to make sure it matches established standards ...

Many thanks in advance!

Henning

Hauksen Thursday 1st March 2018 10:18

Hi again,

Quote:

Originally Posted by Hauksen (Post 3684524)
I wonder if before sharing my design, I should better re-visit it to make sure it matches established standards ...

Here some photographs that maybe illustrate my thoughts better then my words do:

https://www.thingiverse.com/thing:2810628

Also, the adapter itself can be downloaded from there for 3D-printing :-)

Regards,

Henning

Hauksen Sunday 15th July 2018 01:02

Hi again,

Quote:

Originally Posted by Hauksen (Post 3684897)
Also, the adapter itself can be downloaded from there for 3D-printing :-)

I have just uploaded a fully customizable new adapter here:

https://www.thingiverse.com/thing:3004127

(The old one was one particular size, and optimized for cheap printing using commerical services. The new one, besides being customizable in all relevant dimensions, is optimized for easy printing on a desktop 3D printer.)

Since I just ran across an old thread in this subforum mentioning that some reflex sights are too dim to be of use in daylight conditions: If the sight offers a green reticle in addition to the more typical red one, that tends to be a lot more visible even in a very bright environment.

Regards,

Henning


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