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Using T6s for HA solar.

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#1 dscarpa

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Posted 23 November 2012 - 11:31 AM

I was going to sell at least some of my T6 but gave them a try for solar first and the result was very good. There's a much longer post in the eyepiece form on the subject title: A new role for my T 6s. HA solar. David

#2 slack

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Posted 23 November 2012 - 12:10 PM

As I replied in your original thread in the EP forum, I've enjoyed the 13mm T6 for solar (1x bino / 46x mag). But I found the 9mm T6 to be literally bad in comparison to other options.

I compared two 9mm T6s to two ES 8.8mm 82 N2s in daytime and nighttime testing in TV refractors and preferred the ES for both. The ES resolved greater detail in fairly comprehensive daytime resolution tests, and was far better for h-alpha as the 9mm T6 had terrible blackout issues. (The 9mm T6 did require less "in" focus, which can be helpful.)

I compared pairs of 13mm T6s to pairs of ES 14mm and 11mm 82 N2s and preferred the 13mm T6s.

#3 dscarpa

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Posted 23 November 2012 - 01:18 PM

I just tried the 9 for solar alone and in my Siebert barlow and it's every bit a good and easy to use as the 7 and 11! The 3 T6s are about identical for nighttime use as well.

#4 slack

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Posted 23 November 2012 - 01:54 PM

Then I might hate the 7mm and 11mm T6s - though I have read others' comments here that the 9mm T6 is their least favorite in the line, as well. Again, I do like the 13mm T6 for both solar and night, and find it conspicuously better than the 9mm T6 for solar.

In any event, if you like the other T6s for solar that's great. If you get a chance to compare the 9mm T6 to the ES 8.8mm 82 N2 it would be interesting to hear your impressions. For me, the ES 8.8mm blew it away. I know the ES 11mm is well regarded, but neither it nor the ES 14mm impressed me.

Btw, I did not incorporate a barlow in any of my evaluations. Just mono or TV Bino Vue (1x). H-alpha filtration is pre-Meade SM60/BF30.

#5 slack

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Posted 23 November 2012 - 11:04 PM

Well, I went out late today for h-alpha (and this evening for lunar, Jupiter and some double stars) and might be changing my mind about the 13mm T6 (46x) vs the ES 14mm 82 N2 (43x). I preferred the ES 14mm today and tonight.

Actually, 24mm Pans (25x) put up the overall nicest view of the sun today, though a significantly smaller presentation.

#6 dscarpa

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Posted 25 November 2012 - 02:33 PM

My 14 ES82 stays in my solar line up where I've been using it a lot with my 2X TV barlow. It's without question a very good HA eyepiece. My A team solar besides the ES are 11, 9 and 7 T6s, and 1.5X Siebert and 2X TV barlows. David






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