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Old 11-04-2016, 09:46 AM
AEAJR (Ed)
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Join Date: Mar 2016
Location: Long Island, New York, USA
Posts: 372
I am about to become an eyeglass wearer - what do I need to know about eyepieces?

I started in astronomy in May, first looking at the sky, then binoculars and now telescopes.

As I have spent time with Jupiter specifically I came to realize that Jupiter is supposed to be a soft ball in the sky and through binoculars. It is not supposed to have any spikey legs to it. I checked in binos, 2 scopes and various eyepieces.

Then I realized that the reason stars are not pinpoints is not collimation or eyepieces, it is my eyes. Time to get the eyes checked. And there are other things telling me that I probably need glasses.

Saw the doctor. Need correction and have some astigmatism in both eyes. But overall pretty healthy. Ordered the glasses today.



Soooo, what should I know about observing with eyeglasses? This is going to be new to me. Aside from getting right of the spikey look I may be able to see more detail in Saturn and Jupiter and Mars.


I know eye relief is important but how much eye relief do I need? 12mm? 14 mm? More?

Anything else I need to consider besides eye relief?

Does one place the eyeglass lens on the eyepiece lens or should it be where I normally keep my eyeball?

Two of my most commonly used eyepieces are 9.7 and 6.4 mm plossls but they only have 5 mm and 2 mm eye relief. So I am probably going to need to replace them.

The rest of my eyepieces have at least 13 mm of eye relief so I hope they will be OK.


I am not looking to spend on new eyepieces if I don't need to but if I am going to need get them them I might as well ask for guidance now.

What do you think of the Explore Scientific 82 degree eyepieces in 6.7 and 11 mm. They are on sale right now, about 33% off in the USA. Typically 13mm or more eye relief. Good for eyeglass users?
http://agenaastro.com/explore-scient...ece-6-7mm.html


Agena Astro has Enhance Wide Angle, 66 degrees in 6 and 9 mm.
http://agenaastro.com/agena-1-25-ewa-eyepiece-set.html


Celestron X-Cel LX at 60 degrees seem to have good eye relief. I have been told these are the same as the Meade HD-60. I have the HD-60 4.5.
http://agenaastro.com/celestron-9mm-...ece-93423.html



Any thoughts from eye glass wearers would be appreciated. I am new at this.
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