A really F-U-N eyepiece! My new 28mm RKE!
Posted 11 February 2012 - 09:36 PM
First light was an awakening. It instantly became abundantly clear to me that you don't have to spend a lot of money to have a lot of fun in this hobby.
The 28mm RKE for me is major-league eyepiece for a relatively low price. Word is slowly getting around here on CN about this eyepiece's mystical ability to project a "floating" image. My experience was just as others reported. Once you've got your head positioned in just the right spot, the housing for they eyepiece just completely disappears. All that's left is this floating image that is indescribable.
It was as striking as it was bewildering. The effect is like nothing I have ever imagined in an eyepiece.
I always thought my other eyepieces (like my Brandons and my Ultrascopics) gave this floating effect, but the 28mm RKE is at a whole other level.
I used all the eyepieces in the attached picture for first light, and the 28mm RKE was by far the most fun eyepiece I used. I didn't want to stop using it.
Funny how little recognition this terrific eyepiece gets. I bet if it sold for 10x as much and had different color lettering, it would be heralded as the second coming!
- Iksobarg likes this
Posted 11 February 2012 - 10:28 PM
Posted 11 February 2012 - 10:29 PM
They are a great eyepiece, indeed. I have to say that I do not care for the rest of the RKE line as much as the 28mm, as I wear eyeglasses and, save for the 21mm, the eye relief is too short to suit me... even so, they are remarkably sharp, and excellent eyepieces overall, especially at their price point.
The "floating" effect you describe is a bit magical, isn't it? I have never seen it's like in another eyepiece. The effect is not so pronounced when the rubber eyecup that Edmund supplies with these eyepieces is used, but is present nonetheless.
Yes, if Edmund started calling these Umlautz Konigfarben oculars, made with EckhardWerk glass, and listed them at $600 apiece, well... there would most likely be a thread twenty pages long regarding them
Posted 11 February 2012 - 10:35 PM
Posted 12 February 2012 - 01:21 AM
Posted 12 February 2012 - 07:05 AM
But being a three element design, it does plays best with slower focal ratios.
Posted 12 February 2012 - 11:23 AM
I bet its all about the eye relief which is 24.5mm. I had a older Celestron 26mm "silvertop" Plossl with a 24mm eye relief which made the image "pop-out" at you--giving you the "wow" effect. The 28mm Edmund RKE gives you the same feeling I'm sure.
I've been wondering about this effect as well for many years. I've seen it in the two lowest power RKE's as well as the 26mm and 30mm Celestron Silvertop Plossls. The 2" 48mm Brandon also seems to produce this effect. I've always wondered if this is an optical characteristic that can actually be quantified and designed for.
I'd love to here from someone more versed than I in optical engineering, voice their opinion on this topic. Any takers?
Posted 12 February 2012 - 11:49 AM
Posted 12 February 2012 - 12:11 PM
Posted 12 February 2012 - 12:54 PM
Posted 12 February 2012 - 01:01 PM
Posted 12 February 2012 - 01:09 PM
I find it mind-boggling that I enjoy this eyepiece more than Naglers, Ethos, Pentax's and Brandon's. I mean it only cost $62.50!
The 28mm RKE is not for everybody. But for those of us who enjoy it, we seem to enjoy it a lot!
Posted 12 February 2012 - 01:10 PM
Posted 12 February 2012 - 08:07 PM
BTW the 28MM RKE has always caused a stir from time to time and is probably the most talked about eyepiece ever, IMO.
Posted 13 February 2012 - 01:00 AM
Posted 13 February 2012 - 01:11 AM
Is it a 1.25" barrel?
Does it have edge issues in fast refractors, F/5.5? and F/6.5?
Posted 13 February 2012 - 02:24 AM
Posted 13 February 2012 - 06:28 AM