Skywatcher BD 180mm f/15 Mak Intes M703 180mm f/10 Mak ED102 f/7 refractor Vixen LVW42, 22,13,8,5 and Vixen LV50
Bill The opinions expressed herein are solely mine as an amateur astronomer hobbyist & consumer. Information herein was correlated from experience, discussions with others, & research from multiple sources freely available at time of posting. All reasonable care & skill was used, but no warranty is made as to accuracy, & liability cannot be accepted for errors/omissions. This is for information only and not intended nor implied to be a substitute for professional advice.
Quote:A set I had from the late 1990's early 2000's was phenomenal. The 8mm was exactly on-par with the TV 7.4mm Plossl for planets. Picked up some newer vintage ones about a year or 2 ago and they were no where near as good...giving soft images at best for planetary and easily surpassed by other Orthos and Plossls.The eye relief does "feel" tight on the 8mm, however that is because of how deeply the lens is inset in the housing. If moved up the eye relief would be quite generous feeling for an 8mm. However, the 8m TV Plossl feels very tight as well so no advantage there in the eye relief department IMO. A 7mm volcano Ortho feels best of the three for me.As a side, with that older set I had, the RKEs were phenomenal on M42 and the Trap. The RKEs would routinely pull in Trap E & F cleaner than any other eyepieces...including my orthos and wide-fields. So they were a wonderful set for that.Sadly though, IMO the current production RKEs seem to have lost something over the years as not performing as well. Exception is the 28mm RKE which IMO everyone should experience with its "floating" view. I keep that one and use it semi-often in my scopes, including my f.4.7 Dob as it is plain fun! It is also exceedingly good with high power Barlow for planetary (although the ER gets really long...but you gotta take the bad wit the good for all eyepieces)
Quote:Sadly though, IMO the current production RKEs seem to have lost something over the years as not performing as well. Exception is the 28mm RKE which IMO everyone should experience with its "floating" view.
C10NGT, Z8, 150 Rumak, XLT 150, C6, C5, SW5 Newt, 4.5 Ball, C102GT, C90, ST80, A70LF; 15x70, 25x100; Burgess BV; Paracorr II; T6 2.5, XO 2.58/5.1, Ethos-SX 3.7, Delos 4.5, TV Plossl 7.4-26, BCO 10, Hutech HC 12.5, Sterling 12.5-25, ES100 14, CZJ H 16/25, CZJ O 16, M5k UWA 24, T5 31, Ultrascopic 35, Titan-II 40; Bino Pairs M5k UWA 6.7, Baader Zoom 8-24, M5k SWA 24, TV Plossl 26, RKE 28.7; Zooms NZ 2-4, NZ 3-6, Leica ASPH 8.9-17.8, Baader 8-24; Baader Zoom Barlow, VIP Barlow
My eyepieces are made from the waste product of exploding stars. 10XTi 102XLT ST80A(2" Focuser) XW: All; XO: 2.58 Televue: Naglers-T1 Smoothside-full set, 17T4,12T4,Ethos 17,4.7; plossels-40,32,20,17,&7.4mm; Pans-22,24mm; Delos-6,8,12,17.3mm ES100: 5.5,9*,14,20 ES82: full set ES68: 16,20,24,34 NLV: 5,9,10,15 Ortho: HD-7,9; OPS-9,12 Meade RG 7mm Other: Pentax 12.5K(.965), 10mm Parks Zoom: Nag3-6 *=on b/o DAS Dark Site
Quote:I have the EO RKE's and haven't had a chance to give them a definitive 'grade'. But it feels like they're at least better than the recent TMB PII's; whichever ones I have.
Quote:A set I had from the late 1990's early 2000's was phenomenal. The 8mm was exactly on-par with the TV 7.4mm Plossl for planets. Picked up some newer vintage ones about a year or 2 ago and they were no where near as good...giving soft images at best for planetary and easily surpassed by other Orthos and Plossls.
Quote:There are wildly differing opinions on the performance of RKE's. Maybe part of the reason is that the QC of the line has varied so much over the years.
Quote:"whichever ones I have."Next up class; "How to tell when you have too much stuff"
Quote:Quote:There are wildly differing opinions on the performance of RKE's. Maybe part of the reason is that the QC of the line has varied so much over the years.
Very true that there are lots of opinions on the QC of the Edmund RKEs. Frankly I never had much problem with them...the older varieties. Just the newer ones gave me issues when I purchased several new. Actually had to send them back as they were delivered with cracked lenses, then the replacements were bottom of the list when I did a personal shootout of 8mm RKE, TV Plossl, Brandon, AP-SPL, TMB Supermono. In that testing, which I did over almost a whole year, the AP-SPL and TMB were neck-in-neck with the Ap eventually winning. The Brandon placed next, then the TV Plossl, then a very distant last was the RKE. This was only for lunar and planetary performance.
btw, yes, all my comments are for the Edmund RKEs and not the Plossls. The Edmund Plossls are great...with their only weakness being IMO that they are apparently single coated so not as bright as multicoated fare.
Quote:Could it be that they're being mfg in China now. Ever see pics of the air in Beijing???? Doubtfull if these mfgs are using "clean rooms" to mfg eyepieces, let alone what's finding its way into the glass making process itself......
Mike Traub(Mr. Congeniality): I've learned that I don't suffer from insanity, I enjoy it!:Shipfitters mottos; Cut to suit, pound to fit, paint to hide!: If it dosen't fit get a bigger hammer!......Retired and BROKE!!!!!!!!: The Maypole Observatory.
Refractors Reflectors Two Cats A few eyepieces