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Equipment Discussions >> Eyepieces

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Starman1
Vendor (EyepiecesEtc.com)
*****

Reged: 06/24/03

Loc: Los Angeles
Re: Have 24mm Panoptic 68d, need 31mm Baader Aspheric? new [Re: NorthWolf]
      #6620805 - 07/07/14 01:26 AM

Quote:

Right now, I need to solve whether I will keep the 31mm Baader Aspheric, which eyepiece to get next and also which 2 eyepieces I would enjoy most on a 22mm wide binoviewer, perhaps in reality it's less than 22mm...

I tried the 6SE for the first time yesterday, in the day as I knew it would be cloudy in the night. I was enjoying the monstrous sunspots that are on display on our star at the moment (With a Baader Solar Film Filter). I managed to get in really close with the 7mm Pentax, an excellent view, but it may be missing that extra final, fine focus touch of a moonlite focuser. But I would not know, I never had one. It may have also been the seeing, which has been terrible lately, probably due to the sun's waves as of late!

I did not see much difference on the 31mm Aspheric and the 24mm Panoptic when I observed the moon that was coming from the south-se. Overall, impressive telescope! I will give the aspheric one more chance in the dark I guess before deciding, maybe it's worth keeping.





Remember, the best hours for seeing where the sun is concerned are in the early morning, before the sun has heated up the atmosphere and started it boiling.


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NorthWolf
Carpal Tunnel
*****

Reged: 02/23/09

Loc: Eastern Canada
Re: Have 24mm Panoptic 68d, need 31mm Baader Aspheric? new [Re: Starman1]
      #6620824 - 07/07/14 01:53 AM

That's good to know I hope there is no clouds around noon next weekend. I cannot see the eastern sky until that time, maybe around 11am.

Might as well look at the sun if every night is going to be mushy. A clear night sky is a bonus now instead of a necessity.

Edited by NorthWolf (07/07/14 01:54 AM)


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NorthWolf
Carpal Tunnel
*****

Reged: 02/23/09

Loc: Eastern Canada
Re: Have 24mm Panoptic 68d, need 31mm Baader Aspheric? new [Re: NorthWolf]
      #6624482 - 07/09/14 12:15 AM

So I tried the 31mm on the moon last night and liked the view better than the 24pan. The views and sharpness looked identical, something about the aspheric that made me like it more... the bigger tfov or something.

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pbsastro
professor emeritus
*****

Reged: 03/21/07

Re: Have 24mm Panoptic 68d, need 31mm Baader Aspheric? new [Re: Starman1]
      #6625175 - 07/09/14 12:53 PM

Quote:

Remember, the best hours for seeing where the sun is concerned are in the early morning, before the sun has heated up the atmosphere and started it boiling.



Don, your reasoning is correct and it is true 99% of the cases, not my case though. My apartment has one balcony/window facing sunrise and other sunset.
When the sun is high enough on sunrise side, the spot has already been heating for too much time (since sunrise).
When the sun appears on the sunset side, it is very high in the sky and the spot has been on shade all day.
So, my experience is the spot itself (and the nearby air, ground and objects) is more important than the atmosphere. So the best is to use a spot that has been on the shade and has just starting being hit by the sun.


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Lew Zealand
Pooh-Bah
*****

Reged: 06/28/04

Loc: Pasadena, CA
Re: Have 24mm Panoptic 68d, need 31mm Baader Aspheric? new [Re: Starman1]
      #6626177 - 07/10/14 12:45 AM

Quote:

In my experience with a C6, the illumination is down to about 50% at the edge of a 27mm field (the field stop size of a 32 Plossl or 24 widefield).




I'd like to emphasize this point. I've experienced all of Don's other points on my 8" SCT but not everyone is familiar with this one.

Pop your widest, lowest power EP in your SCT and defocus a star cluster. M7 (Ptolemy's) is great for this but many others are too, like the Beehive and Pleiades. Note the shape of the defocused stars. Even with an 8" SCT and a 32mm Plossl, you will notice that most of the stars, to rather disturbingly close to the center of the FOV, experience some vignetting. The donut isn't round. There is a very small area in the center of the TFOV in a <9.25" SCT which is unvignetted.

Pop in a 2" refractor diagonal with a 2" visual back adapter and a defocused 40mm 70 EP and the vignetting is just everywhere. Refocus and it looks great, though. The vignetting really isn't particularly noticeable visually and I think I know why - it (fortunately??) starts close to the center and it's gradual. Your (OK, my) eye is fooled by the slow reduction in illumination so a full 2" FOV looks great. And it masks off much of the EOF aberrations in lower quality EPs because those light rays are simply cut off. Starting at f/10 doesn't hurt, either. The 40mm WO SWAN and it's brethren look great!

Pop in an f/6.3 reducer/flattener and a 2" SCT diagonal and the 22mm T4 Nagler still looks fab as does the 28mm Meade 5K SWA. Go any wider than those and you see the vignetting fall away to darkness and the illusion is broken.


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Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Ontario, Canada
Re: Have 24mm Panoptic 68d, need 31mm Baader Aspheric? new [Re: Lew Zealand]
      #6626282 - 07/10/14 02:52 AM

Quote:

So I tried the 31mm on the moon last night and liked the view better than the 24pan. The views and sharpness looked identical, something about the aspheric that made me like it more... the bigger tfov or something.




Really?

I've tried both and the 24mm Pan just spanks it.....in a HUGE way! Much sharper EP IMO!

Too bad I was so broke, or I'd be all over your 24mm pan!


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Jon Isaacs
Postmaster
*****

Reged: 06/16/04

Loc: San Diego and Boulevard, CA
Re: Have 24mm Panoptic 68d, need 31mm Baader Aspheric? new [Re: Scanning4Comets]
      #6626398 - 07/10/14 07:35 AM

Quote:

Quote:

So I tried the 31mm on the moon last night and liked the view better than the 24pan. The views and sharpness looked identical, something about the aspheric that made me like it more... the bigger tfov or something.




Really?

I've tried both and the 24mm Pan just spanks it.....in a HUGE way! Much sharper EP IMO!

Too bad I was so broke, or I'd be all over your 24mm pan!




Markus:

I think the difference is that Northwolf was looking though a 6 inch F/10 SCT and you were looking through your 10 inch F/4.7. I often enjoy viewing the moon at very low magnifications, it just kind of hangs there, looking very much like the giant rock it is. But it's an aesthetic view rather and a detailed view.

Jon


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