Page 1 of 2 12 LastLast
Results 1 to 10 of 16
  1. #1
    NorraStjarna's Avatar
    NorraStjarna is offline Main Sequence
    Points: 7,605, Level: 61
    Level completed: 19%, Points required for next Level: 245
    Overall activity: 0%
    Achievements:
    365 Days+ Registered Achievement!750 Days+ Registered Achievement!First 1000 Experience Points2 Posts Achievement50 Posts Achievement!
    Join Date
    Feb 2009
    Location
    Moorpark, CA
    Posts
    65
    Points
    7,605
    Level
    61
    Thanks
    10
    Thanked 9x 9 Posts

    Default Have a great setup, but I need a few more eyepieces.



    I have two eyepieces. Pentax 40mm and 14mm. I want to see detail on Jupiter, Saturn and Uranus. I was thinking of getting a 7mm and a 3.5mm EP as well. Would that get me the desired detail I'm looking for? Has anyone used a 3.5 with a barlow lens?
    C11 Edge HD/CGEM mount
    Pentax XW40/Pentax XW14

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

  2. #2
    jimt's Avatar
    jimt is offline Super Moderator
    Points: 37,302, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    200+ Posts Achievement!First 1000 Experience PointsGot three Friends20+ Friends Achievement!5+ Referrals Achievement!
    Join Date
    Jul 2009
    Location
    North Georgia
    Posts
    5,715
    Points
    37,302
    Level
    100
    Thanks
    1,338
    Thanked 2,734x 1,769 Posts

    Default

    Unfortunately with planets the amount of magnification you can use is usually limited by the atmospheric conditions at the time you are observing. Most people observe planets under 200x and more like 150x unless the seeing conditions are near perfect. Very rarely will you be able to jack your magnification up to 400 or 500x on planets. It happens but not often. I believe that C11 has a 2800MM focal legnth so with your 14mm ep you will be at 200x and with a barlow inline you will be at 400x. Focal legnth of your telescope (2800) divided by the fl of your ep (14mm) gives you 200x.

    So as you can see buying a more powerful eyepiece isn't probably gona help ya much on planets. Just my thoughts on it anyway. Good luck

    Jim
    Celestron C9.25. Atlas EQG mount. Canon 500D unmodded, Celestron ST80 guide scope, SSAG, Meade 6.3 FR, Thousand Oaks dew control with Dewnot straps. Zhumell 8/24mm Zoom, 2"Gso Superview 42mm, Meade 2"QX wide angle 30MM, Meade 1.25 EP and filter set. Tasco 10x50 Zhumell 20x80 bino and a few other odds and ends.
    Now where did I put that clear sky button!

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

  3. #3
    NorraStjarna's Avatar
    NorraStjarna is offline Main Sequence
    Points: 7,605, Level: 61
    Level completed: 19%, Points required for next Level: 245
    Overall activity: 0%
    Achievements:
    365 Days+ Registered Achievement!750 Days+ Registered Achievement!First 1000 Experience Points2 Posts Achievement50 Posts Achievement!
    Join Date
    Feb 2009
    Location
    Moorpark, CA
    Posts
    65
    Points
    7,605
    Level
    61
    Thanks
    10
    Thanked 9x 9 Posts

    Default

    Quote Originally Posted by jimt View Post
    Unfortunately with planets the amount of magnification you can use is usually limited by the atmospheric conditions at the time you are observing. Most people observe planets under 200x and more like 150x unless the seeing conditions are near perfect. Very rarely will you be able to jack your magnification up to 400 or 500x on planets. It happens but not often. I believe that C11 has a 2800MM focal legnth so with your 14mm ep you will be at 200x and with a barlow inline you will be at 400x. Focal legnth of your telescope (2800) divided by the fl of your ep (14mm) gives you 200x.

    So as you can see buying a more powerful eyepiece isn't probably gona help ya much on planets. Just my thoughts on it anyway. Good luck

    Jim
    When I say detail, I mean rings around planets, a moon on occasion. Right now, my 14mm gives me a dot in my telescope. I'd like to actually see the planet take up more than a pinpoint on my telescope. Would picking up a Pentax 7mm suffice? I'll probably pick up a decent 2x barlow as well.
    C11 Edge HD/CGEM mount
    Pentax XW40/Pentax XW14

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

  4. #4
    NorraStjarna's Avatar
    NorraStjarna is offline Main Sequence
    Points: 7,605, Level: 61
    Level completed: 19%, Points required for next Level: 245
    Overall activity: 0%
    Achievements:
    365 Days+ Registered Achievement!750 Days+ Registered Achievement!First 1000 Experience Points2 Posts Achievement50 Posts Achievement!
    Join Date
    Feb 2009
    Location
    Moorpark, CA
    Posts
    65
    Points
    7,605
    Level
    61
    Thanks
    10
    Thanked 9x 9 Posts

    Default

    I bought a Pentax 10mm for planets and the moon, and a barlow just to have for whatever and whenever I think I'll need it.
    C11 Edge HD/CGEM mount
    Pentax XW40/Pentax XW14

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

  5. #5
    Bob327's Avatar
    Bob327 is offline HYPER GIANT
    Points: 41,366, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    10 Days registered200+ Posts Achievement!First 1000 Experience PointsGot three Friends365 Days+ Registered Achievement!
    Join Date
    Sep 2009
    Location
    Frederick Maryland
    Posts
    9,247
    Points
    41,366
    Level
    100
    Thanks
    19
    Thanked 4,039x 3,068 Posts

    Default

    Quote Originally Posted by NorraStjarna View Post
    When I say detail, I mean rings around planets, a moon on occasion. Right now, my 14mm gives me a dot in my telescope. I'd like to actually see the planet take up more than a pinpoint on my telescope. Would picking up a Pentax 7mm suffice? I'll probably pick up a decent 2x barlow as well.
    Wow....

    I think you are doing some "serious" daydreaming...

    According to Celestron their 11' Sct (both the regular and Edge OTA's) are rated as having ...or being capable of ... delivering 661x ... (the rated highest USEFUL magnification)

    And I seriously doubt that anyone can even come close to that much magnification when using the scope from the surface of the Earth...Just way too much "junk" in our atmosphere..

    I happen to own a Celestron C11... (not the edge) and it is pier mounted in my backyard observatory...the highest power eyepiece I even have in the observatory is a 8.5 mm (Pentax XF BTW) mm ...and I do NOT even keep that eyepiece handy for use in my eyepiece case...since it just never gets any use... I keep it in a drawer to use with my ST80 which is piggypacked on top of the CPC

    I just do not think you will EVER get to use a 7 mm ...and know your will NEVER be able to use even a 10 mm with a barlow...

    Bob G
    CPC1100 housed in a slotted domed observatory (Exploradome) 4 and 5 inch refractors for use from the lawn, a 8" Sct (NS 8i) for star parties...
    I Hate the winter so I use heated Motorcycle clothing to stay warm while observing in winter
    Retired, also have 2 other hobbies
    1. tinker with older Corvettes (6 in garage)
    2. make a heck of a lot of sawdust in my wood shop.

  6. #6
    DigitalNinja's Avatar
    DigitalNinja is offline Bright Giants
    Points: 9,921, Level: 68
    Level completed: 91%, Points required for next Level: 29
    Overall activity: 0%
    Achievements:
    10 Days registered365 Days+ Registered Achievement!200+ Posts Achievement!Got three FriendsFirst 1000 Experience Points
    Join Date
    Mar 2009
    Location
    Halifax, Canada
    Posts
    474
    Points
    9,921
    Level
    68
    Thanks
    95
    Thanked 145x 95 Posts

    Default

    And most of the time the planet is very bright to see much detail in it, your eyes need to be trained to a telescope and can take a few years to see much detail beyond a white ball.

  7. #7
    roverich's Avatar
    roverich is offline Moderator
    Points: 41,419, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    Got three Friends20+ Friends Achievement!First 1000 Experience Points5+ Referrals Achievement!100+ Threads Achievement!
    Join Date
    Jan 2009
    Location
    virginia .usa
    Posts
    7,913
    Points
    41,419
    Level
    100
    Thanks
    2,009
    Thanked 1,962x 1,528 Posts

    Default

    Hi Norra ... You might try some different colored filters ...Check out the "stickie" filter thread ...Different colors will bring out detail on planets ...
    16in Night sky
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    F4.5 , 90mm refractor 500mm FL , 7in
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    classic Big-mac , Meade eye pieces with a few odd balls thrown in ...
    If you cant stand behind the american soldier ,
    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.
    Please stand in front of one ...

  8. #8
    NorraStjarna's Avatar
    NorraStjarna is offline Main Sequence
    Points: 7,605, Level: 61
    Level completed: 19%, Points required for next Level: 245
    Overall activity: 0%
    Achievements:
    365 Days+ Registered Achievement!750 Days+ Registered Achievement!First 1000 Experience Points2 Posts Achievement50 Posts Achievement!
    Join Date
    Feb 2009
    Location
    Moorpark, CA
    Posts
    65
    Points
    7,605
    Level
    61
    Thanks
    10
    Thanked 9x 9 Posts

    Default

    Quote Originally Posted by Bob327 View Post
    Wow....

    I think you are doing some "serious" daydreaming...

    According to Celestron their 11' Sct (both the regular and Edge OTA's) are rated as having ...or being capable of ... delivering 661x ... (the rated highest USEFUL magnification)

    And I seriously doubt that anyone can even come close to that much magnification when using the scope from the surface of the Earth...Just way too much "junk" in our atmosphere..

    I happen to own a Celestron C11... (not the edge) and it is pier mounted in my backyard observatory...the highest power eyepiece I even have in the observatory is a 8.5 mm (Pentax XF BTW) mm ...and I do NOT even keep that eyepiece handy for use in my eyepiece case...since it just never gets any use... I keep it in a drawer to use with my ST80 which is piggypacked on top of the CPC

    I just do not think you will EVER get to use a 7 mm ...and know your will NEVER be able to use even a 10 mm with a barlow...

    Bob G
    People say I'm a dreamer. I never said I was going to use the barlow with the 10. I said I bought it for whenever I think I'd need it.



    I'm a complete newb with telescopes. I've had my first one for less than a week and only taken it out twice. Easy, tiger.
    Last edited by NorraStjarna; 03-23-2010 at 01:41 AM.
    C11 Edge HD/CGEM mount
    Pentax XW40/Pentax XW14

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

  9. #9
    NorraStjarna's Avatar
    NorraStjarna is offline Main Sequence
    Points: 7,605, Level: 61
    Level completed: 19%, Points required for next Level: 245
    Overall activity: 0%
    Achievements:
    365 Days+ Registered Achievement!750 Days+ Registered Achievement!First 1000 Experience Points2 Posts Achievement50 Posts Achievement!
    Join Date
    Feb 2009
    Location
    Moorpark, CA
    Posts
    65
    Points
    7,605
    Level
    61
    Thanks
    10
    Thanked 9x 9 Posts

    Default

    Quote Originally Posted by DigitalNinja View Post
    And most of the time the planet is very bright to see much detail in it, your eyes need to be trained to a telescope and can take a few years to see much detail beyond a white ball.
    That's good to know! I saw different colors in Mars, but Saturn was just too small to see anything. I went down to Scope City and talked to the manager. He showed me what I can expect to see.
    C11 Edge HD/CGEM mount
    Pentax XW40/Pentax XW14

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

  10. #10
    NorraStjarna's Avatar
    NorraStjarna is offline Main Sequence
    Points: 7,605, Level: 61
    Level completed: 19%, Points required for next Level: 245
    Overall activity: 0%
    Achievements:
    365 Days+ Registered Achievement!750 Days+ Registered Achievement!First 1000 Experience Points2 Posts Achievement50 Posts Achievement!
    Join Date
    Feb 2009
    Location
    Moorpark, CA
    Posts
    65
    Points
    7,605
    Level
    61
    Thanks
    10
    Thanked 9x 9 Posts

    Default

    Quote Originally Posted by roverich View Post
    Hi Norra ... You might try some different colored filters ...Check out the "stickie" filter thread ...Different colors will bring out detail on planets ...
    Thank you, I'll do that!
    C11 Edge HD/CGEM mount
    Pentax XW40/Pentax XW14

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

 

 
Page 1 of 2 12 LastLast

Similar Threads

  1. AP setup
    By haimi in forum Orion Telescopes Forum
    Replies: 13
    Last Post: 05-20-2009, 05:50 PM
  2. GREAT RED SPOT NOT AS GREAT
    By Sam Wormley in forum Amateur Astronomy Forum
    Replies: 2
    Last Post: 02-28-2009, 01:49 PM
  3. Great Astronomers - The Great DEBATE
    By Painius in forum General Astronomy Forum
    Replies: 0
    Last Post: 08-30-2005, 08:41 PM
  4. Question about this setup
    By Tom E. in forum Amateur Astronomy Forum
    Replies: 10
    Last Post: 09-24-2004, 12:37 PM
  5. For sale - great portable ETX 90 setup
    By Joe Hartley in forum Amateur Astronomy Forum
    Replies: 0
    Last Post: 09-15-2003, 05:19 PM

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 04:54 AM.