Degrees of Separation

[Jiggy 67]

During an observation session recently I viewed a number of double and triple stars ✨ 

I realized that I had no way of recording the separation between stars, particularly when changing magnification. Anyone use an accurate method of measuring the separation???

[vlaiv]

Far from being an expert on this, but how about:

https://www.firstlightoptics.com/specialist/baader-microguide-illuminated-reticle-eyepiece.html

 

[Merlin66]

If you can image the double stars, then Florent Losse's Reduc program is the one to use.

Email him for a copy. florent_losse@yahoo.fr

http://astrosurf.com/hfosaf/

 

[Jiggy 67]

16 hours ago, vlaiv said:

Far from being an expert on this, but how about:

https://www.firstlightoptics.com/specialist/baader-microguide-illuminated-reticle-eyepiece.html

 

Yeh, I have looked at them in the past but they are an expensive solution!!!......however I do need a new illuminated eyepiece for star alignment.....

 

[vlaiv]

7 minutes ago, Jiggy 67 said:

Yeh, I have looked at them in the past but they are an expensive solution!!!......however I do need a new illuminated eyepiece for star alignment.....

 

Yes they are - way more expensive than I would imagine for a simple eyepiece.

Maybe DIY option then?

You really only need some sort of reticle with steps to be able to measure distance - you'll need to calibrate it anyways, so maybe solution would be a glass blank with engraving? You only need to place it at focal plane of eyepiece and field stop should help there. I wonder how much does it cost to have a piece of glass precision engraved?

[vlaiv]

10 minutes ago, Jiggy 67 said:

Yeh, I have looked at them in the past but they are an expensive solution!!!......however I do need a new illuminated eyepiece for star alignment.....

 

On the other hand - there could be relatively cheap solution compared to this eyepiece but it does require use of computers (so if you don't already have a lap top - it's not cheap at all) -

cheap second hand guide camera like ASI120 - and doing imaging / measurement from images?