Author Topic: Edmund 8mm RKE vs Televue 8mm Plossl  (Read 379 times)

Mayur Wilson

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Edmund 8mm RKE vs Televue 8mm Plossl
« on: December 29, 2017, 12:49:23 AM »
150mm at f/8, 1200mm focal length, will be also used with the Televue 1.25" 2X barlow on the Moon, Saturn and Mars.  Which will win??  I'm ready to throw down but the clouds are not cooperating, I have recently ventured into TV Plossl land and I have been absolutely thrilled with the results, coupled with the TV 2X barlow and 2X Powermate the TV Plossl has won me over using them with my TMB 92SS and 6inch f/8 Dob.   I decided to compare as critically as I can the Plossl's to the RKE and some Ortho's I have.   So while I'm waiting for the clouds to give what do you think??  Big difference?? no difference?? wasting my time ??

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noneanoncrag

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Re: Edmund 8mm RKE vs Televue 8mm Plossl
« Reply #1 on: December 29, 2017, 04:22:53 AM »
And before someone yells Delos!! lets throw this into the mix.

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Jeremy George

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Re: Edmund 8mm RKE vs Televue 8mm Plossl
« Reply #2 on: December 30, 2017, 09:30:35 PM »
Darn...one of the few I don't own Though I would be interested in hearing about them. I'm not sure I want to get them based on eye relief. Maybe talk to that on the plossl and RKE.I love both lines of eyepieces! We need more throwdowns on this site!! There are some really good past ones in the review section though.

Ligon Payton

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Re: Edmund 8mm RKE vs Televue 8mm Plossl
« Reply #3 on: January 10, 2018, 07:15:22 AM »
Dont have the RKE so I cant comment on that one.However you will get some vignetting with the Televue 8mm Plossl when used with the standard Televue 2x barlow.With the TV plossls, best to use the powermates.

Eric Mannasseh

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Re: Edmund 8mm RKE vs Televue 8mm Plossl
« Reply #4 on: January 12, 2018, 04:13:53 AM »
Not a waste of time to me because I don't have to do the work, just read the results.  I say proceed  .

unetankem

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Re: Edmund 8mm RKE vs Televue 8mm Plossl
« Reply #5 on: January 13, 2018, 03:32:27 AM »
I like the photo presentation. Will look forward to your opinion. Plus I agree, I would like to see lots more of these side by side comparisons, I find them really interesting.

naiciareamu

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Re: Edmund 8mm RKE vs Televue 8mm Plossl
« Reply #6 on: January 13, 2018, 03:55:47 PM »
I have compared them both numerous times since they 're still in the "less glass case".It's 99% a tie in my book for most targets, with the TV having the edge on Jupiter due to the different color hue it presents.George

Woody Boelkens

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Re: Edmund 8mm RKE vs Televue 8mm Plossl
« Reply #7 on: January 13, 2018, 08:35:03 PM »
Quote
Not a waste of time to me because I don't have to do the work, just read the results.  I say proceed  .

  Well I tried to get out last night and it looked like it might clear up, I was looking forward to it but the clouds wouldn't move the way I wanted them to.  Next few days is forcasted for rain but I will be vigilant and as soon as the sky clears I will be out, might have to wait a bit    Darn clouds.

Ronnie Walsh

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Re: Edmund 8mm RKE vs Televue 8mm Plossl
« Reply #8 on: January 16, 2018, 11:52:36 PM »
Where from John? Good stuff keep at it! I was actually side testing a2x tv barlow and 2.5x powermate last night with a few eyepieces, will post some notes sometime soon! Thx very curious to see your results.

Steve Lewis

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Re: Edmund 8mm RKE vs Televue 8mm Plossl
« Reply #9 on: January 17, 2018, 01:22:01 AM »
Quote
Where from John? Good stuff keep at it! I was actually side testing a2x tv barlow and 2.5x powermate last night with a few eyepieces, will post some notes sometime soon! Thx very curious to see your results.
  South east Michigan, north oakland county.  Just when it looked like it was going to clear up a little more it would get worse, I hate the patchy clouds more than anything because it tempts you more to set up, I would rather it just be all clouds, at least then you're not wondering if you should or shouldn't try, the clear in between the clouds last night was to few to make a go of it.

Lcs King

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Re: Edmund 8mm RKE vs Televue 8mm Plossl
« Reply #10 on: January 21, 2018, 01:55:26 PM »
I know what you mean.  I often go out and look up before dark and if there's full, heavy cloud cover I go back inside and get on with my night.  If it's patchy I have to keep thinking about it and checking.I recently got got an 8mm TV plossl (My first TV eyepiece).  It will be interesting to hear your comparisons to your other eyepieces.Clear Skies.

Adam Rice

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Re: Edmund 8mm RKE vs Televue 8mm Plossl
« Reply #11 on: January 23, 2018, 06:04:16 AM »
#1 - TV Plossl
#2 - Delos
#3 - RKE

If the RKE is an earlier generation, then it might pull #2.  However, seems what has been coming out for the past 10 years from the factory has not been very good IMO.

Now Saturn is a tough target to see significant differences IMO, especially if the scope's aperture is under 10".  Sometimes none to be seen unless you look for the subtle hues and shadings of the polar region.  Jupiter or Mars on the other hand IMO will show more distinction between these eyepieces.

boysagiskest

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Re: Edmund 8mm RKE vs Televue 8mm Plossl
« Reply #12 on: January 23, 2018, 08:00:18 AM »
I agree with BillP here but I was not impressed with my TV 8mm sample when I compared to my 8mm TMB SMC.Also liked the Brandon 8mm alot better.

tenpaseper

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Re: Edmund 8mm RKE vs Televue 8mm Plossl
« Reply #13 on: January 23, 2018, 05:41:57 PM »
Quote
#1 - TV Plossl#2 - Delos#3 - RKEIf the RKE is an earlier generation, then it might pull #2.  However, seems what has been coming out for the past 10 years from the factory has not been very good IMO.Now Saturn is a tough target to see significant differences IMO, especially if the scope's aperture is under 10".  Sometimes none to be seen unless you look for the subtle hues and shadings of the polar region.  Jupiter or Mars on the other hand IMO will show more distinction between these eyepieces.
  Thanks Bill for the info, the RKE is an earlier generation and is why I wanted to put it to the test. I mostly wanted to see if there was any noticeable difference on the Moon, I spend a lot of time on the Moon. Saturn and Mars were my second choice just because they are in good position.  I really don't do any type of critical evaluation of eyepiece types, my observations are more of the casual type when comparing. I pick what I want to use for that particular evening and have at it, this time I really wanted to put forth the effort and patience  to see if I could evaluate and determine the differences between these three, is less glass more?? does it make a difference in 150mm and smaller?? I keep hearing about vignetting with the TV Plossl and TV barlow, I haven't really noticed it when using my TMB 92SS but I really haven't looked for it either.  So I'm looking to answer some questions and determine how significant any differences are compared to what others have said.  I just realized I spelled patience wrong, so I fixed it. I'm a dork.

Matt Hodge

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Re: Edmund 8mm RKE vs Televue 8mm Plossl
« Reply #14 on: January 25, 2018, 08:26:24 PM »
Will be interesting to hear your results, especially on Luna.  I personally find it very difficult to glean out differences from EPs when doing lunar observing.  So in the end, most perform quite well.  Mostly I catch the differences on how detailed delicate ejecta appear.  So for me, the Moon is a very forgiving target that allows most all EPs to perform quite well.  So given this, I think the Delos will walk all over the others on this target simply due to the larger AFOV. 

Another target I use is Schroters Valley and the craters Aristarcus and Herodotus.  There is some amazing contrast differences in and around these and when lit at a good angle is quite spectacular to observe.  The ejecta streaks inside Herodotus are also quite detailed and delicate so can get some good patterns with a good high contrast and low scatter EP.