Results 1 to 10 of 10

Thread: Diagonals

  1. #1
    josmith16's Avatar
    josmith16 is offline Main Sequence
    Points: 5,496, Level: 50
    Level completed: 73%, Points required for next Level: 54
    Overall activity: 0%
    Achievements:
    50 Posts Achievement!5 Threads Achievement!365 Days+ Registered Achievement!First 1000 Experience Points2 Posts Achievement
    Join Date
    Jul 2011
    Location
    Bartlett, TN, USA
    Posts
    192
    Points
    5,496
    Level
    50
    Thanks
    21
    Thanked 51x 30 Posts

    Default Diagonals



    I am curious about how much difference a Dielectric Diagonal at 95-99% reflective to a standard diagonal shipped original with a scope.

  2. #2
    dmbryan's Avatar
    dmbryan is offline Super Moderator
    Points: 38,677, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 20.0%
    Achievements:
    First 1000 Experience Points200+ Posts Achievement!Got three Friends100+ Threads Achievement!365 Days+ Registered Achievement!
    Join Date
    Jun 2009
    Location
    b'ham alabama
    Posts
    5,578
    Points
    38,677
    Level
    100
    Thanks
    4,795
    Thanked 1,938x 1,521 Posts

    Default

    If you get a cheap plastic diagonal with your scope the difference will be quite noticable. If you got a decent one, not so much.
    name: Derek

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

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

    j.gardavsky (07-13-2011)

  4. #3
    Joe Lalumia's Avatar
    Joe Lalumia is offline HYPER GIANT
    Points: 61,001, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    200+ Posts Achievement!Ghost Achievement! Averaging 5+ posts a day!Got three FriendsFirst 1000 Experience Points20+ Friends Achievement!
    Join Date
    Jun 2010
    Location
    Quinlan, Texas
    Posts
    10,947
    Points
    61,001
    Level
    100
    Thanks
    6,772
    Thanked 5,156x 3,400 Posts
    Blog Entries
    1

    Default

    A standard diagonal is about 92% reflective-- a dielectric is 99% reflective and the coatings are more durable. You will notice a visual difference between these two diagonals.
    ETX 125PE, Stellarvue 80mm BV & Televue TelePod tripod,
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    8" LNT, 10x50, 15x70mm binoculars, Stellarvue binoviewers, solar filters for all three
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ..... plus a bunch of ham radios... Ham radio call sign - W1XWX

    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.
    TelescopeMan Web Site

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    search for W1XWX to see my amateur radio web site

    "If you can't explain it to a six year old, you don't understand it yourself.” - Albert Einstein

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

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

    j.gardavsky (07-13-2011)

  6. #4
    loki41872's Avatar
    loki41872 is offline Main Sequence
    Points: 1,718, Level: 25
    Level completed: 18%, Points required for next Level: 82
    Overall activity: 0%
    Achievements:
    5+ Referrals Achievement!365 Days+ Registered Achievement!First 1000 Experience Points750 Days+ Registered Achievement!2 Posts Achievement
    Join Date
    Oct 2010
    Location
    Tennessee, United States
    Posts
    80
    Points
    1,718
    Level
    25
    Thanks
    10
    Thanked 37x 23 Posts

    Default

    I used the regular Celestron 1.25" diagonal that shipped with the Omni 150R for a while. When I got my C6R, it came with a 2" dielectric diagonal. After using both diagonals in both scopes to compare the views between regular vs. dielectric, I quickly bought a 2" dielectric for the Omni as well.

    There IS a noticeable difference.

    Everything looked "crisper" through the dielectric, and I could make out fainter oblects than were visable in the regular. It was like going from regular plossl to nagler.

    The upgrade is worth it, in my opinion.
    Tasco/Vixen 8V on Vixen
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    Celestron C6R on Meade LXD
    Celestron Omni 150R on CG-4
    Meade 90mm Frankenscope on Vixen Polaris
    Meade Telestar 60mm
    Big pile of Eyepieces

  7. The Following User Says Thank You to loki41872 For This Useful Post:

    j.gardavsky (07-13-2011)

  8. #5
    jenniferchristine's Avatar
    jenniferchristine is offline Jedi Moderator
    Points: 76,152, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 8.0%
    Achievements:
    200+ Posts Achievement!Ghost Achievement! Averaging 5+ posts a day!First 1000 Experience PointsGot three Friends20+ Friends Achievement!
    Join Date
    Oct 2010
    Location
    Ormeau SEQld Australia
    Posts
    11,249
    Points
    76,152
    Level
    100
    Thanks
    580
    Thanked 4,790x 3,197 Posts

    Default

    The original diag with the meade 8" is dia-bolical... or is that dire-bollicle
    NEQ6 Pro Mount.
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ACF 8" and
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    8" emc, Canon 450D (Rebel XSi) 18-55 and 75-300 lenses. Canon 70DW 18-135 USM and sigma 70-300. 4000 lens kit.
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Starshoot Autoguider.
    Saxon 100 f9 Apo. Saxon20x80 Binoculars. Meade ext 125 Mak

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    102 x F5 guide
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    /wide field scope. 10x10 shed with dome. Sky watcher sky adventurer mount.

  9. #6
    j.gardavsky's Avatar
    j.gardavsky is offline Super Moderator
    Points: 112,383, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 12.0%
    Achievements:
    Ghost Achievement! Averaging 5+ posts a day!200+ Posts Achievement!400+ Posts AchievementFirst 1000 Experience Points365 Days+ Registered Achievement!
    Join Date
    Feb 2011
    Location
    Germany
    Posts
    14,422
    Points
    112,383
    Level
    100
    Thanks
    14,422
    Thanked 8,799x 5,726 Posts

    Default Diagonals

    Quote Originally Posted by jenniferchristine View Post
    The original diag with the meade 8" is dia-bolical... or is that dire-bollicle
    Hello Jennifere,

    is that a sort of desease on the Meade?

    Best

    JG
    Binoculars: Leica Ultravid 7x42, 8x42HD; Swarovski EL 8.5x42 Swarovision; Nikon 10x70 Astroluxe; Docter Nobilem 7x50 Porro; Jenoptem 7x50W, 10x50W; BA8: 10.5x70, 15x85; 25x100FB, AsahiPentax 8x40, Refractors: Sky-Watcher 150mm/750mm; Leica APO Televid 82mm (25x-50x WW ASPH); EPs:Baader Classic Orthos; Fujiyama ortho, Leica B WW, ultrawide zoom ASPH, Periplan GF, HC Plan S, L; DOCTER UWA; Wild UW mil; Tele Vue Delos, Nagler Zoom, Plössls; Swarovski SW; Pentax XW; ZEISS diascope B WW T*, Carl Zeiss E-Pl; Hensoldt mil; Filters: Astrodon, Astronomik, Baader (CCD), TS;
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    : AstroTrac; Leica R7: Leica 2/50, 2/90mm, 2.8/180mm lenses
    Astronomy Forum Rules and Terms of Service
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  10. #7
    josmith16's Avatar
    josmith16 is offline Main Sequence
    Points: 5,496, Level: 50
    Level completed: 73%, Points required for next Level: 54
    Overall activity: 0%
    Achievements:
    50 Posts Achievement!5 Threads Achievement!365 Days+ Registered Achievement!First 1000 Experience Points2 Posts Achievement
    Join Date
    Jul 2011
    Location
    Bartlett, TN, USA
    Posts
    192
    Points
    5,496
    Level
    50
    Thanks
    21
    Thanked 51x 30 Posts

    Default

    I received my diagonal about a week ago and finally was able to use it last night. I had viewed the moon on previous nights and my old diagonal didn't require a moon filter for brightness, but my Orion Dielectric Diagonal made the moon much brighter last and the viewing unpleasant without a moon density filter. I have read that the standard diagonals are 80% percent reflective and the dielectric are 96-99%. My observation is that their is a huge difference with the dielectric diagonal, and it was money well spent. Thanks everyone for all the information on the dielectric diagonals, and for anyone that still has the standard diagonal shipped with the scope, the dielectric diagonal is a something that you should consider purchasing.

  11. The Following 3 Users Say Thank You to josmith16 For This Useful Post:

    j.gardavsky (07-18-2011),Joe Lalumia (07-18-2011),loki41872 (07-17-2011)

  12. #8
    loki41872's Avatar
    loki41872 is offline Main Sequence
    Points: 1,718, Level: 25
    Level completed: 18%, Points required for next Level: 82
    Overall activity: 0%
    Achievements:
    5+ Referrals Achievement!365 Days+ Registered Achievement!First 1000 Experience Points750 Days+ Registered Achievement!2 Posts Achievement
    Join Date
    Oct 2010
    Location
    Tennessee, United States
    Posts
    80
    Points
    1,718
    Level
    25
    Thanks
    10
    Thanked 37x 23 Posts

    Default

    Good deal josmith! You'll be happy with it.

    You should come out and observe with us sometime. We're not far east of you in Linden, TN. Nice, dark-sky site.
    Tasco/Vixen 8V on Vixen
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    Celestron C6R on Meade LXD
    Celestron Omni 150R on CG-4
    Meade 90mm Frankenscope on Vixen Polaris
    Meade Telestar 60mm
    Big pile of Eyepieces

  13. #9
    josmith16's Avatar
    josmith16 is offline Main Sequence
    Points: 5,496, Level: 50
    Level completed: 73%, Points required for next Level: 54
    Overall activity: 0%
    Achievements:
    50 Posts Achievement!5 Threads Achievement!365 Days+ Registered Achievement!First 1000 Experience Points2 Posts Achievement
    Join Date
    Jul 2011
    Location
    Bartlett, TN, USA
    Posts
    192
    Points
    5,496
    Level
    50
    Thanks
    21
    Thanked 51x 30 Posts

    Default

    Quote Originally Posted by loki41872 View Post
    Good deal josmith! You'll be happy with it.

    You should come out and observe with us sometime. We're not far east of you in Linden, TN. Nice, dark-sky site.
    I think that I just might take you up on that sometime soon. What's the name of your Astronomy Club? I've attended two meeting with the local club in Memphis, The Memphis Astronomical Society. Going to go out hopeful at the end of the month with them when they are doing an observing session. I've really enjoyed the two non-field meetings so far. They have a few professors from University of Memphis and Christian Brothers. I know that one teaches at Astronomy at CBU and I think another one is an Astonomy teacher at UofM, but not sure. They have a couple archeologist, which adds to the mix a little bit and makes things very interesting when they do their monthly meeting at CBU. I joined their eMail list for observation sessions, field parties or whatever they are called, I just not sure. Do ya'll have a observation eMail list?

  14. #10
    loki41872's Avatar
    loki41872 is offline Main Sequence
    Points: 1,718, Level: 25
    Level completed: 18%, Points required for next Level: 82
    Overall activity: 0%
    Achievements:
    5+ Referrals Achievement!365 Days+ Registered Achievement!First 1000 Experience Points750 Days+ Registered Achievement!2 Posts Achievement
    Join Date
    Oct 2010
    Location
    Tennessee, United States
    Posts
    80
    Points
    1,718
    Level
    25
    Thanks
    10
    Thanked 37x 23 Posts

    Default

    We aren't in a club. We just haul the scopes out in the backyard and get to observing. Sometimes it's just 2 of us, sometimes 10. Depends on who comes over.

    The house is in a blue zone, on top of a hill. No club needed.
    Tasco/Vixen 8V on Vixen
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    Celestron C6R on Meade LXD
    Celestron Omni 150R on CG-4
    Meade 90mm Frankenscope on Vixen Polaris
    Meade Telestar 60mm
    Big pile of Eyepieces

 

 

Similar Threads

  1. ETX-125 Diagonals
    By Pingu in forum ETX Telescope Forum
    Replies: 2
    Last Post: 01-07-2011, 05:56 AM
  2. diagonals
    By misterfixall in forum Telescope Eyepieces Forum
    Replies: 7
    Last Post: 06-20-2010, 12:55 AM
  3. diagonals
    By misterfixall in forum Celestron Telescope Forums
    Replies: 7
    Last Post: 10-28-2009, 02:00 AM
  4. diagonals
    By MiKe T in forum Amateur Astronomy Forum
    Replies: 5
    Last Post: 07-22-2007, 01:39 AM
  5. Diagonals
    By Some guy in Arizona in forum Amateur Astronomy Forum
    Replies: 5
    Last Post: 06-05-2006, 09:21 AM

Tags for this Thread

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 02:00 AM.