Page 1 of 3 123 LastLast
Results 1 to 10 of 25
Like Tree2Likes

Thread: Not another ES 82 thread...re: 24 or 30mm

  1. #1
    lvsaint's Avatar
    lvsaint is offline White Dwarf
    Points: 1,727, Level: 25
    Level completed: 27%, Points required for next Level: 73
    Overall activity: 0%
    Achievements:
    First 1000 Experience Points365 Days+ Registered Achievement!750 Days+ Registered Achievement!1000 Days+ Registered Achievement!3 Years + Achievement
    Join Date
    Jun 2010
    Location
    89120
    Posts
    2
    Points
    1,727
    Level
    25
    Thanks
    0
    Thanked 0x 0 Posts

    Default Not another ES 82 thread...re: 24 or 30mm



    Been very impressed with the wealth of knowledge on these forums and I've researched the ES line quite well now.

    I was wanting some input as to what ES low mag EP to get first. I have recently purchased a used XT10 as an upgrade to my XT6.

    I already have 10,25,32 Sirius plossls. Just added a 2inch Barlow and oiii filter and am looking at a nice 2inch wide field EP that won't break the bank but will be a keeper, rather than a cheaper, lesser FOV EP that I might want to upgrade again in the near future.

    I am interested in DSOs - globular clusters and nebulae especially. I understand that a good range of magnification is preferred for the different subjects. Whilst I like the 30ES82, I'm a bit concerned about the weight (and it's more expensive).
    I am starting to settle now for the 24ES82, for it's cost, size/weight and I'd always be able to 2x/1.5x barlow it down to about 12 and 18mm respectively.


    Do I have a fairly good strategy here? Are there things that a 30mm would achieve that the 24 will not?

  2. #2
    ribletman's Avatar
    ribletman is offline Main Sequence
    Points: 2,659, Level: 33
    Level completed: 40%, Points required for next Level: 91
    Overall activity: 0%
    Achievements:
    5 Threads Achievement!50 Posts Achievement!2 Posts Achievement20 Posts Achievement!365 Days+ Registered Achievement!
    Join Date
    Mar 2012
    Location
    Charlotte, NC
    Posts
    136
    Points
    2,659
    Level
    33
    Thanks
    42
    Thanked 78x 36 Posts

    Default Re: Not another ES 82 thread...re: 24 or 30mm

    Orion XT10 reflector
    Aperature 254mm
    Focal Length 1200mm
    Focal Ratio 4.724

    Exit Pupil 7 mm = 33 mm EP @ 33x mag
    Exit Pupil 5 mm = 24 mm EP @ 50x mag
    Exit Pupil 3 mm = 14 mm EP @ 86x mag
    Exit Pupil 2 mm = 9.5 mm EP @ 126x mag
    Exit Pupil 1 mm = 4.7mm EP @ 255x mag

    Depending on light polution, nearby bright ground source lights, how often you prefer to start hunting for objects right away, etc. you should choose your wide field EP with an eye on how big an exit pupil you are likely have under your most common usage. At my location, there is no way I could ever benefit from a 7mm exit pupil versus a 5-6mm. The 24mm eye piece you are already considering would yeild a 5mm exit pupil, making a nice match for many light-polluted areas.

    I think you should also seriously consider getting a good quality EP in the 9-10mm range, which would also barlow nicely to 4.5-5mm.
    deimos3428 likes this.
    Celestron EdgeHD 1100, CGEM-DX, Feather touch micro-focuser

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ST80 guide
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    , Starshoot autoguider, ADM rings and dovetail
    Cannon 550d(T2i), Fastar lens (587mm, F2),
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    (1960mm, F7)

  3. #3
    rcagle44's Avatar
    rcagle44 is offline Bright Giants
    Points: 10,024, Level: 69
    Level completed: 25%, Points required for next Level: 226
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!200+ Posts Achievement!
    Join Date
    Jun 2012
    Location
    Decatur, Alabama
    Posts
    552
    Points
    10,024
    Level
    69
    Thanks
    54
    Thanked 108x 96 Posts

    Default Re: Not another ES 82 thread...re: 24 or 30mm

    I'm getting my ES 82 30mm sometime today, I will post back and let you know how it is. I hear everyone say its a really good EP. I was in the same boat as you on whether to get the 24mm or 30mm. I went ahead and got the 30mm cause its seems everyone who has it loves it.
    16"
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    f/4.5
    Orion SkyQuest XT10 Classic
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    f/4.7
    Explore Scientific 82* 30mm
    Explore Scientific 100* 20mm, 9mm
    Zhumell 2" 2x barlow
    Zhumell 2" O-III filter and UHC filter
    Celestron SkyMaster 15x70 Binoculars

  4. #4
    cbrucker's Avatar
    cbrucker is offline HYPER GIANT
    Points: 26,066, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    50 Posts Achievement!Ghost Achievement! Averaging 5+ posts a day!5 Threads Achievement!200+ Posts Achievement!400+ Posts Achievement
    Join Date
    Dec 2011
    Location
    Arcadia California
    Posts
    2,335
    Points
    26,066
    Level
    100
    Thanks
    16
    Thanked 661x 527 Posts
    Blog Entries
    21

    Default Re: Not another ES 82 thread...re: 24 or 30mm

    For wide field I use the 18mm and 24mm. Both give me PLENTY of field of view with good contrast and the like. I actually use my 18mm most of the time since it is lighter than the 24 but still lets me have that plenty wide field. The 30mm is nice but at most I would go with at 24 for the weight with an 18 being a close second what with it being lighter and still having an impressive FOV. Add to that either an 11 or 14 from the same line and you are 'cooking with gas'.
    Refractors: Takahashi TOA-150, TOA-130, TSA-120 & FSQ-85; Tele Vue NP101is
    Solar: Lunt 80mm PT Ha
    Reflectors: Celestron EdgeHD 1400, Takahashi Mewlon 210 & Mewlon 250
    Mounts: AP Mach1GTO & 1100; DM6; AZ8; SW AZ-EQ6 & AZ-GTi; Celestron CGX
    Eyepieces: Televue Ethos 100* 17, 13, 10, and 6mm, 2x24mm Panoptics, 2x16mm, 2x13mm (for TV BV), 3.5mm Nagler & 3-6 click zoom;
    Cameras: SBIG Aluma 694; Canon Rebel T3i
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ; Starlight Xpress Ultrastar color

  5. #5
    lvsaint's Avatar
    lvsaint is offline White Dwarf
    Points: 1,727, Level: 25
    Level completed: 27%, Points required for next Level: 73
    Overall activity: 0%
    Achievements:
    First 1000 Experience Points365 Days+ Registered Achievement!750 Days+ Registered Achievement!1000 Days+ Registered Achievement!3 Years + Achievement
    Join Date
    Jun 2010
    Location
    89120
    Posts
    2
    Points
    1,727
    Level
    25
    Thanks
    0
    Thanked 0x 0 Posts

    Default Re: Not another ES 82 thread...re: 24 or 30mm

    Riblet - yes, very light polluted here in town (Las Vegas) so the 24mm would be better, although I will be observing a fair bit in dark sky areas too.

    rcagle - hope you get clear skies tonight to try out your new 30

    cbrucker - heard good things about the 11 and one I'd probably go for later on. How much better is the 18mm EP compared to using a 1.5x barlow on a 24?

    Thanks for the input folks!

  6. #6
    MitchAlsup's Avatar
    MitchAlsup is offline SUPER GIANT
    Points: 5,847, Level: 52
    Level completed: 49%, Points required for next Level: 103
    Overall activity: 0%
    Achievements:
    200+ Posts Achievement!First 1000 Experience Points400+ Posts Achievement50 Posts Achievement!365 Days+ Registered Achievement!
    Join Date
    Sep 2011
    Location
    Austin Texas
    Posts
    1,066
    Points
    5,847
    Level
    52
    Thanks
    1
    Thanked 505x 381 Posts

    Default Re: Not another ES 82 thread...re: 24 or 30mm

    Quote Originally Posted by lvsaint View Post
    Do I have a fairly good strategy here? Are there things that a 30mm would achieve that the 24 will not?

    Field of View! the 30mm ES82 (and the 31mm NaglerT5) provide the widest fields of view possible in a 2" eyepiece (excepting the 41mm Panoptic, the 30mm Ziess and the 30mm Lietz).

  7. #7
    rcagle44's Avatar
    rcagle44 is offline Bright Giants
    Points: 10,024, Level: 69
    Level completed: 25%, Points required for next Level: 226
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!200+ Posts Achievement!
    Join Date
    Jun 2012
    Location
    Decatur, Alabama
    Posts
    552
    Points
    10,024
    Level
    69
    Thanks
    54
    Thanked 108x 96 Posts

    Default Re: Not another ES 82 thread...re: 24 or 30mm

    I got the ES 11mm and love it for globular clusters. Jupiter Looks awesome with the 11mm also. I would highly recommend the 11mm in the future. It barlows well too and is crystal clear. Probably my 2nd
    most used EP next to my ES 100 9mm.
    16"
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    f/4.5
    Orion SkyQuest XT10 Classic
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    f/4.7
    Explore Scientific 82* 30mm
    Explore Scientific 100* 20mm, 9mm
    Zhumell 2" 2x barlow
    Zhumell 2" O-III filter and UHC filter
    Celestron SkyMaster 15x70 Binoculars

  8. #8
    Telrad's Avatar
    Telrad is offline Bright Giants
    Points: 7,391, Level: 60
    Level completed: 21%, Points required for next Level: 159
    Overall activity: 0%
    Achievements:
    5 Threads Achievement!2 Posts Achievement20 Posts Achievement!50 Posts Achievement!365 Days+ Registered Achievement!
    Join Date
    Jan 2012
    Location
    Glen Spey NY
    Posts
    411
    Points
    7,391
    Level
    60
    Thanks
    25
    Thanked 58x 46 Posts

    Default Re: Not another ES 82 thread...re: 24 or 30mm

    I just had this very same dilemma in another thread. I went with the 30mm. Its big and impressive. The views are stunning. No regrets.
    22.6" f5 handmade
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    stepladder beast
    Lunt Solar Lunt50THa w/ B600 &
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    SmartStar A alt alt/az mount
    Zhumell z12 w/ a Telrad sight (for sale, ask me)
    C8 OTA with Celestron Starsense & Meade ED5000 80mm APO Combo
    Mount: CGEM & ASGT(cg-5) equatorial mounts with a concrete pier
    Celestron 6se with a green laser for pointing the big dob in the right direction
    Explore Scientific 82° 4.7, 6.7, 8.8, 11, 14, 18, 24, 30 mm Eyepieces

  9. #9
    sportsmed's Avatar
    sportsmed is offline HYPER GIANT
    Points: 13,456, Level: 80
    Level completed: 2%, Points required for next Level: 344
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!Ghost Achievement! Averaging 5+ posts a day!
    Join Date
    Jun 2012
    Location
    hot springs, AR
    Posts
    2,407
    Points
    13,456
    Level
    80
    Thanks
    397
    Thanked 398x 359 Posts
    Blog Entries
    2

    Default Re: Not another ES 82 thread...re: 24 or 30mm

    If your looking at either the 24mm or 30mm I would go with the 24mm personally. I have a 23mm Axiom LX that I use for low mag viewing and hardly ever pull out my 30mm. With that scope you are using and wanting to look at globs and Nebula I would be looking at mid range EP's like the 11mm or 14mm ES 82...or even possibly the 18mm, have those with either a barlow or a good high power EP and that is where its at! For that scope the only time you would be using that 30mm for the most part would just to be scanning the sky with....and thats alot to pay for scanning. But this is just my opinion...and only suggestions.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    :
    Zhumell Z10, Celestron C90,
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    127slt, Celestron AZ3 mount

    EP's: Zhumell 2" 30mm & 9mm ep, Celestron Omni 32mm,
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    25mm, Celestron Axiom LX 23mm, Agena SWA 20mm, Russell Optics 2" research grade 18mm Konig, ES 82 14mm, ES 82 11mm, Celestron X-Cel LX 9mm,
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    2" 2x
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    , Celestron 2x Barlow

    Accessories: Telrad, Laser Pointer, Laser Collimator, 8x50 RACI, Astro Tech dielectric diagonal
    Cams&Filters: Philips Toucam 740, Logitech C270, Solar filters,
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    filter, Celestron UHC


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  10. #10
    cbrucker's Avatar
    cbrucker is offline HYPER GIANT
    Points: 26,066, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    50 Posts Achievement!Ghost Achievement! Averaging 5+ posts a day!5 Threads Achievement!200+ Posts Achievement!400+ Posts Achievement
    Join Date
    Dec 2011
    Location
    Arcadia California
    Posts
    2,335
    Points
    26,066
    Level
    100
    Thanks
    16
    Thanked 661x 527 Posts
    Blog Entries
    21

    Default Re: Not another ES 82 thread...re: 24 or 30mm

    Quote Originally Posted by lvsaint View Post
    cbrucker - heard good things about the 11 and one I'd probably go for later on. How much better is the 18mm EP compared to using a 1.5x barlow on a 24?
    Thanks for the input folks!
    For me the 24 is just too wide and too big. Too big because of it's weight which means on the refractor I have to really lock down the tension screws making it harder to rack the focuser and too wide because the LP tends to wash things out so I don't really use it unless I am at a dark site.

    The 18 really strikes the balance for me. I get good detail on very large (wide field objects) but then the 14 and the 11 give me that too. It will really amaze you at how really wide the field is.

    As to the barlow... I have never made the comparison for the 18 as I found I really didn't like the way the barlows I had access to reduced the FOV so instead I just spent the money on the eyepiece lineup. Per my sig I have the entire ES 82* line except for the 30mm. I skipped the 30 because if the 24 was wide and heavy for me I couldn't imagine what the 30 would be like! As an example the 18 gave me a great view of M5 and M57 (ring) with a great detail for the magnification but still had a very wide field to bracket and background them. I haven't used it yet on Orion as it's not up early enough for me but plan to in the coming months. Based on what I see presently I think it will capture a good amount of detail and a wide view of the total nebula.

    What I have done is take the 6.6 and barlow it with a decent barlow on a 6" Newt a friend of mine had at a star party while looking at Saturn. It brought it down to a 3.3. Everyone there was amazed at the clarity and FOV and everyone (including a couple of EP snobs) agreed that it was an amazing bit of optical engineering based on what we were seeing. To be fair it was also a good night for viewing.

    So again were it me I would invest in the 18 and the 11 or the 18 and the 14. That way you get a pretty wide FOV at a decent mag that can be taken down to a 9mm with barlow and a good EP for close in work that can be taken down to a 7mm or a 6mm depending on if you go 14 or 11.
    sportsmed likes this.
    Refractors: Takahashi TOA-150, TOA-130, TSA-120 & FSQ-85; Tele Vue NP101is
    Solar: Lunt 80mm PT Ha
    Reflectors: Celestron EdgeHD 1400, Takahashi Mewlon 210 & Mewlon 250
    Mounts: AP Mach1GTO & 1100; DM6; AZ8; SW AZ-EQ6 & AZ-GTi; Celestron CGX
    Eyepieces: Televue Ethos 100* 17, 13, 10, and 6mm, 2x24mm Panoptics, 2x16mm, 2x13mm (for TV BV), 3.5mm Nagler & 3-6 click zoom;
    Cameras: SBIG Aluma 694; Canon Rebel T3i
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ; Starlight Xpress Ultrastar color

 

 
Page 1 of 3 123 LastLast

Similar Threads

  1. ES 82 30mm
    By rcagle44 in forum Telescope Eyepieces Forum
    Replies: 5
    Last Post: 09-29-2012, 12:41 PM
  2. New ES 82* 4.7mm & 30mm
    By Bobble in forum Telescope Eyepieces Forum
    Replies: 15
    Last Post: 06-11-2012, 02:29 AM
  3. ES 30mm 82 degree ?
    By claws in forum Astronomy Beginners Forum
    Replies: 7
    Last Post: 03-21-2012, 01:46 AM
  4. Sigma 30mm f/1.4 EX DC HSM
    By Dragon206 in forum Astronomy Digital Cameras Forum
    Replies: 14
    Last Post: 04-16-2011, 08:44 PM
  5. 30x and 30mm telescope?
    By borris83 in forum General Astronomy Forum
    Replies: 3
    Last Post: 02-12-2009, 07:58 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBulletin® Version 4.2.0
Powered by vBulletin®
All times are GMT. The time now is 11:17 PM.