Meade etx 125 eyepiece selection

[Stonesinthesky]

Thank you.. was just going to use Amazon... but might look at a couple of thre Ontario based shops

[Stonesinthesky]

What about the 18mm meade series 5000

[Stonesinthesky]

Ontario telescope has a baader hyperion 13 or 17mm on sale for 155...that might be in the budget

[Lady Fraktor]

The 17mm is sometimes considered one of the best of the series, they work very well in telescopes slower than f/7 which is good for your slow f/15

[Stonesinthesky]

Out of curiosity, what would make one lense a better fit than the next?

Ie why did the previous poster say the luminous would be no good in my scope and likewise the hyperion be a very good fit?

In other words how is the lense effected by the speed of the scope?

[Lady Fraktor]

Some eyepiece designs work better with different telescope designs, about the closest thing to a universal eyepiece would be the modern Plossl which is really a symmetrical eyepiece.

Once you start getting into larger/ wider FOV eyepieces there are more elements, harder curves and aberrations have to be balanced out so a trade off.
What works well in a mid to slow refractor may not work well at all in a fast Newtonian.

As an example, Masuyama eyepieces are designed for telescopes of f/7 or slower. This is where you will get the best edge to edge view.
In a faster telescope you lose edge performance, the view softens/ blurs, stars may start looking like streaks or you may see objects start going egg shaped as they get further out for center of view.