Eyepiece question about the etx90 and future scope
Posted 16 May 2013 - 11:43 AM
I have looked over several posts and dug around trying to find a good rounded set of eyepieces for my etx90. I have the 26mm and have a 6.4 and 12.4 on order.
I am also hoping to buy a 10" dobson near the end of summer. Taking that into consideration, I curious if there's any other ep's I need to be on the look out for.
ps. I am shoestringing this, so money is an object.
Posted 16 May 2013 - 03:11 PM
Cheap and impressive views
Posted 17 May 2013 - 07:22 AM
I'd consider a 32mm. or 40mm. Plossl eyepiece to give your scope the widest field possible. Also, I enjoy using a zoom eyepiece with my ETX-125. It's convenient, simple and fun to "dial-in" the exact magnification to match local seeing conditions when viewing the sun (filtered view, of course) and the moon. I use a Zhumell 8-24mm Zoom ($60) which is an amazing eyepiece for the money and has great online reviews:
Zhumell Zoom Eyepiece
Enjoy your Mak and Good Luck with the new 10" Dob ...
Posted 17 May 2013 - 07:56 AM
The 26 SP that comes with it is a good overall EP. From there I would go up to a 32mm for your widest view. The 12.4 is about as high a power I use in my 90ETX. The 6mm is not a good idea as it is too much power in that scope and very small eyerieve. Get a good 2x barlow if you have an exceptional night on the 12.4mm.
After that, my most used EP in that scope is in the 16-20mm range. Meade make a very nice 18mmHD with 60* fov and nice 20* eye relief. Celestron has the same one too...they run &70-80. Also the AT line is a good choice from our sponcer, Astronomics
Posted 17 May 2013 - 08:07 AM
For low power wide field in the ETX you want a 1.25 inch 32mm Plossl or a 24mm 68 degree like the panoptic if you can afford it or the ES 24/68 which is impossible to get right now.
For medium and high power I suggest an 11mm ES 82 and a good 2x Barlow.
Posted 17 May 2013 - 10:15 AM
The 10" is still in the future, but I am keeping my eyes in craigslist and ebay. I want to look through a used scope before I buy it. I got lucky on the 90 so I am hoping history repeats itself.
Posted 19 May 2013 - 08:13 AM
32mm Plossl (Televue, old design)
16mm Konig (out of production)
9mm Orthoscopic (poor seeing)
7mm Orthoscopic (good seeing)
If the seeing is REALLY good, a 6mm Orthoscopic.
For a 10" dob, i prefer, other, wider field of view eyepieces.
Posted 20 May 2013 - 09:23 AM