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It's been a week since Christmas. How about some reports on new eyepieces received as gifts (or bought for yourself)? To get things started, I received a 17mm ES-92 and have had a couple of chances to use it in both a coma corrected dob and a flat field short tube refractor. It's easy to use with eyeglasses, has a very wide field of view that can be seen all at once without straining, is as sharp at the edge as a Delos (which is to say as sharp as at the center), has no discernable field curvature, and seems to have nearly constant angular magnification across the field. The weight and size do have to be managed, but it is well worth the effort. I haven't tried it without coma correction or flat field correction or with a barlow yet, so no reports on those aspects yet. I measured the AFOV to be 92 or 93 degrees as claimed using reverse projection with a flashlight shining into the field lens. Usable eye relief was measured to be 17mm using the same technique, so just a millimeter less than my measured 18mm for the 10mm Delos. Overall, I'm so stoked, I hope to get the 12mm and other focal lengths as they become available.
If you're anything like me, it's just too much to wait for Christmas to get that little something for the telescope or astronomy in general. But I have resisted the urge to buy the 'SkyFi wireless adapter' to run my scope with SkySafari, and it should arrive from Santa on the 25th December! So what Astronomical goodies are you hoping for the festive season? Here's a link to mine in case you are looking for inspiration: https://store.simulationcurriculum.com/collections/accessories/products/skyfi-iii-usb-wireless-telescope-adapter cheers Mike
Seasons greetings, all! HiloDon and I are at it again with another seasonal delight for our friends here at SGL! HiloDon provided the stellar images and I created the musical landscape and produced the video. There's a little surprise near the end! Hope you enjoy! For all who observe, have a Merry Christmas and Happy New Year! Reggie