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Eyepiece suggestion for AT80ED

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#1 Ed Fortier

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Posted 14 July 2020 - 02:17 PM

I am waiting for delivery of an Astro Tech AT80ED, due this Friday. I have never owned a short tube refractor before, so now I'm wondering about eyepieces. The best ep I have suitable for this scope is the 24mm Panoptic, but probably a 2-inch is needed to achieve the best views. I really don't want to spend more on an ep than I spent on the scope, but if anyone has any suggestions I'd like to hear them. It would be nice to find an ep that suits an 80mm f/7 so well that there would seldom be a need to switch out. I know, perfection is elusive and never cheap.



#2 cst4

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Posted 14 July 2020 - 02:28 PM

I don't think you need anything lower power than the 24mm Panoptic.  That's only 23x in that scope which is very low power.  You could go lower with a long focal length 2" EP but I do not see the need... any lower than that and might as well just grab some binoculars.  According to your signature you have a Baader zoom.  That plus the pan covers everything in that scope from 23x to 70x very well.  If I were you, I would concentrate on the 70x to 170x magnification range with my next purchase(s).  Adding a 2.5x barlow or Powermate to the zoom would cover it perfectly.  Or 2 or 3 individual EP's between 3.2mm and 8mm would do the trick as well... you could do 3.5mm, 5mm, and 7mm T6 Naglers if you like Televue.  



#3 russell23

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Posted 14 July 2020 - 02:35 PM

If you want an eyepiece you can just put in and forget switchin I might suggest the 13mm Ethos or13mm APM XWA which is only $250 but right there with the Ethos. It willgive you a 2.3 deg TFOV and better image scale then the 24mm Pan. Or since you have tbe pan you could go with shorter FL, but then you will go below 2 deg field.
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#4 havasman

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Posted 14 July 2020 - 02:38 PM

That 24Pan should be really good. To go wider at less than the highest costs you might look at the APM UFF 30mm that's been getting a lot of high marks recently.



#5 Dave Mitsky

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Posted 14 July 2020 - 03:13 PM

I own a number of short-focal-length refractors and agree that a 24mm Panoptic negates the need for a 2" eyepiece for the most part.  As russell23 said, a 13mm 100 degree AFOV eyepiece should provide excellent views.



#6 Ed Fortier

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Posted 14 July 2020 - 07:01 PM

Thanks for all the helpful suggestions. I do think now that the 24mm Pan is the lowest power I'd want to go with. As a matter of fact, I recently bought  a pair of Vortex 10 x 50 Viper binoculars and, as cst4 said, it makes no sense to stray into that territory. I do have the Baader zoom, which was also suggested as a good fit. I once had a 13mm Ethos but, for reasons I can't now fathom, I sold it several years ago. I wish I had it now, but that's water under the bridge. Thanks for convincing me that I already have all the eyepieces I really need (although I will look into the 13mm APM XWA that russell23 mentioned). 



#7 cupton

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Posted 15 July 2020 - 09:14 AM

An 8-24 Vixen zoom with the occasional 2x barlow and an ES 68, 28mm are the only two EP's I really use in my ED80 scope. Pretty content with my minimalist setup actually. I wouldn't mind trying the Baader zoom one day. But until then I don't know what Im missing! ;) 


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