Astro-Tech AF70 1.25/2" Eyepieces (1 Viewer)

I was wondering if anyone has used any of these 70 degree eyepieces in the Pentax 65ED-AII. I am interested in the 17mm. I was comparing it to the Baader Hyperion 17mm. It has the same element/group spec's, with the Baader being a few ounces lighter but with 17mm of eyerelief ??? ...gwen

I don't have that one but I do use the 15mm Celestron Luminos UWA with 82° AFOV and 17mm eye relief that is on sale for $79.95.
http://www.optcorp.com/celestron-15mm-luminos-eyepiece.html

Want to see a Hand Grenade size eyepiece on the Pentax 65mm scope

gcole said:

I was wondering if anyone has used any of these 70 degree eyepieces in the Pentax 65ED-AII. I am interested in the 17mm. I was comparing it to the Baader Hyperion 17mm. It has the same element/group spec's, with the Baader being a few ounces lighter but with 17mm of eyerelief ??? ...gwen

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A few days after I posted this question about the Astro-Tech AF70 17mm eyepiece, I came across one on that other site discounted for about $30 off the regular web site prices so I took a gamble not knowing if it would even come to focus on the little Pentax 65 EDAII. Well to my surprise ... WOW ! , what a nice eyepiece. Its the size of a hand grenade, having a Huge! size ocular lens which gives a panorama view slightly larger than the Pentax XW20. I could not believe just how big this thing was & to my relief it does focus near & far. I like this so much I just ordered the 13mm. I posted these pictures of the 17mm eyepiece in between a 12.0z /8.0z soda cans , along with the pentax 65mm with the 17mm Astro-Tech on my monopod. For those of you who are interested the Pentax's scope cover will zip up over the eyepiece with the rubber eye guard up .... gwen

How could a 17mm eyepiece with 70° AFOV have a wider FOV than the Pentax 20mm XW with 70° AFOV ?

That's a good question ? When I went back in forth comparing the view of both the Astro - Tech / Pentax, the Astro - Tech just seemed to give me a wider view with my glasses off. Maybe its the design of the Astro -Tech's eye ocular? , its flat field or just the way my 62 yr old eyes perceived the view. ..gwen