I am using a K20 Lens to look at the moon - it is perfect - I can see the moon nice and clearly.
It's not as magnified as I would like - so I change to my SR4 lens. - WHOA Too big! - but still a nice picture, just not enough of the field of view.
So - I then changed to my Barlow 3x lens and I can't get a picture at all, it just comes out as a huge fuzzy white mass of blur!
Am I doing something wrong here? Should I be using this Barlow lens with a different type of lens?
I need a bit of advice on how to use it effectively.
(I am using a small Celestron PowerSeeker60 :P - if that helps)
Thanks in advance! =)
Jonathan
(Amature Astronomer in the makings!!)
2007-01-29 06:17:02 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
Some Barlows are not parfocal, which means you may have to adjust the focus after inserting the Barlow. Also, make sure that there is no other accessory between the Barlow and the eyepiece, like a diagonal. The proper order should be: focuser, diagonal, Barlow, eyepiece.
2007-01-29 07:34:57 · answer #1 · answered by Keith P 7 · 2⤊ 0⤋
If you are using a star diagonal switch the position of the diagonal and the barlow. If I remember correctly the barlow needs to be placed between the diagonal and the objective, and the eyepiece inserted into the diagonal.
Also (and this is from experience) make certain there is no obstruction inside the barlow lens.
2007-01-29 07:22:39 · answer #2 · answered by David A 5 · 0⤊ 0⤋
I've used a 2x barlow lens and it worked great for magnification.
If its fuzzy - you probably have to focus it. If you can't ultimately focus it, maybe its just a poorly designed lens, go with a better brand.
2007-01-29 06:20:18 · answer #3 · answered by Anonymous · 0⤊ 0⤋