19 mm eye relief is especially valuable for eyeglass wearers.
I do wear eyeglasses but tend to view with out them. As I have had variable astigmatism,? Al was trying to properly 'size' their astigmatism products.? I ended up buying several sizes but sharing views with friends doesn't make that an accessible accessory. If you pardon the alliteration.? Within the last year I have exercised my eyes and corrected with lenses, I can now achieve 20/15 vision in both eyes. So now if I want to truly enjoy the space walk especially with the 110¡ã AFOV of the two highest power Ethos, the 4.7 and 3.7, I am trying to get in the practice of wearing my spectacles.
I do find it useful to focus the eyepiece at public observing with my glasses on. If I can achieve best focus then most people can view through the scope without having to change focus. Those that need to, well, we teach them to use the fine focus first.
I have the 21 & 13 mm Ethos as well, Alan. Very fine optics indeed!
John
On Sun, Feb 9, 2025 at 11:52 AM, Alan Sheiness via groups.io
<sheinessam@...> wrote:
Ah. My Ethos are 100 degree and 80 degree, 21mm and 13mm respectively. Not sure on the eye relief but no complaints.
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Thank you, John.
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Alan Sheiness
Trail 53 Observatory, Lyme CT
