Results 1 to 5 of 5
Like Tree10Likes
  • 2 Post By michael131313
  • 4 Post By Bigzmey
  • 1 Post By Ozman13
  • 1 Post By Trombatissimo
  • 2 Post By Bigzmey

Thread: ES 82* 4.7mm for my 144mm f/4?

  1. #1
    michael131313's Avatar
    michael131313 is offline SUPER GIANT
    Points: 13,034, Level: 78
    Level completed: 82%, Points required for next Level: 66
    Overall activity: 0%
    Achievements:
    2 Posts Achievement5 Threads Achievement!20 Posts Achievement!50 Posts Achievement!First 1000 Experience Points
    Join Date
    Aug 2016
    Location
    San Jose del Valle, Nayarit, Mexico
    Posts
    1,158
    Points
    13,034
    Level
    78
    Thanks
    3,234
    Thanked 344x 270 Posts

    Default ES 82* 4.7mm for my 144mm f/4?



    I would like opinions on getting an ES 82* 4.7mm for my 114mm f/4 reflector. It would give me about 96x and have pupil exit of about 1.175mm (if I calculated it right). I don't have a problem with spending the money on my small scope(since it's on sale). It will make my scope better and be valuable in the future. Thanks.
    Bigzmey and Trombatissimo like this.
    ES AR 102 102mm, f/6.5, Orion Starblast 4.5 114mm,f/4 , Celestron 10x50, GSO SV 30mm, ES 68° 20mm, ES 82° 14mm, 11mm, 8.8 mm, 6.8mm, 4.7mm. Twilight 1 mount.

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

  2. #2
    Bigzmey's Avatar
    Bigzmey is offline HYPER GIANT
    Points: 40,753, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 59.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!200+ Posts Achievement!
    Join Date
    Sep 2015
    Location
    Planet Earth
    Posts
    7,545
    Points
    40,753
    Level
    100
    Thanks
    1,801
    Thanked 3,185x 2,291 Posts

    Default Re: ES 82* 4.7mm for my 144mm f/4?

    I can confirm that ES 82 4.7mm is a good quality EP, excellent for planets, moon and double stars. It should work well for your scope since many users report success with fast reflectors. It also works well in other telescope types, so will be a good investment indeed.

  3. The Following User Says Thank You to Bigzmey For This Useful Post:

    michael131313 (04-03-2017)

  4. #3
    Ozman13's Avatar
    Ozman13 is offline HYPER GIANT
    Points: 29,217, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 20.0%
    Achievements:
    2 Posts Achievement5 Threads Achievement!20 Posts Achievement!365 Days+ Registered Achievement!50 Posts Achievement!
    Join Date
    Jun 2013
    Location
    Hopkinsville Kentucky
    Posts
    8,432
    Points
    29,217
    Level
    100
    Thanks
    170
    Thanked 2,238x 2,011 Posts

    Default Re: ES 82* 4.7mm for my 144mm f/4?

    I'm with Bigzmey, it's a great EP and although I do not have your exact scope, I can say it's very good in both my AD12 and my buddy's XT8. Works extremely well in my refractors down to f/5, and of course in my slower scopes as well.
    Bigzmey likes this.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ACF 8"SCT,
    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.
    ,
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    120, ES 102CF Apo triplet, ES AR102, ST100, ST90, Apex 90mm Mak, ST80, ETX60,
    Oberwerk BT-82XL-ED, 25x100s, 15x70s, 8x56s, Kasai 2.3x40s, Celestron AVX, CG4, SLT, LCM, Obie HD Parallel Bino mount
    Explore Scientific 82 degree and 68 degree EPs, Baader 9mm Ortho, Meade 5000 SWA EP set, many more various EPs, Baader Moon&SkyGlow, FringeKiller, SemiApo filters, Celestron UHC, Meade 4000 Nebular Filter, Kson OIII, DGM NPB and lots of astro stuff.

  5. The Following User Says Thank You to Ozman13 For This Useful Post:

    michael131313 (04-03-2017)

  6. #4
    Trombatissimo's Avatar
    Trombatissimo is offline HYPER GIANT
    Points: 10,686, Level: 71
    Level completed: 46%, Points required for next Level: 164
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!50 Posts Achievement!Gallery Achievement!Album Achievement!
    Join Date
    Feb 2017
    Location
    Montreal, Quebec, Canada
    Posts
    1,981
    Points
    10,686
    Level
    71
    Thanks
    951
    Thanked 773x 613 Posts

    Default Re: ES 82* 4.7mm for my 144mm f/4?

    The only issue with all these short FL 82's is the tight eye relief. If you are mainly interested in the wide field The ES is unbeatable at that price and is an excellent all around performer. If you want to give up some field size for comfort, the 68 to 70 degree and "planetary" models in the 58 to 62 degree range give you an extra 5 or 6 millimeters space and less fatigue from having to hold your distance exactly to avoid blackout or kidneybeaning. This seems to be very subjective, but if you have only used longer FL 82's previously, it can be a surprise, because it is not as much of a problem for most observers at the longer focal lengths.
    j.gardavsky likes this.

  7. The Following 2 Users Say Thank You to Trombatissimo For This Useful Post:

    j.gardavsky (04-04-2017),michael131313 (04-04-2017)

  8. #5
    Bigzmey's Avatar
    Bigzmey is offline HYPER GIANT
    Points: 40,753, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 59.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!200+ Posts Achievement!
    Join Date
    Sep 2015
    Location
    Planet Earth
    Posts
    7,545
    Points
    40,753
    Level
    100
    Thanks
    1,801
    Thanked 3,185x 2,291 Posts

    Default Re: ES 82* 4.7mm for my 144mm f/4?

    I agree, eye relief is a bit tight, but I still prefer ES 82 over other EPs in 3-5mm range I have tested including TV Radian, Celestron X-Cel LX/Meade 5000 HD60, Dual ED, Orion/Zhumell LER and TMB.
    j.gardavsky and Trombatissimo like this.

  9. The Following User Says Thank You to Bigzmey For This Useful Post:

    michael131313 (04-04-2017)

 

 

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 12:20 PM.