Page 1 of 2 12 LastLast
Results 1 to 10 of 12
  1. #1
    botoole's Avatar
    botoole is offline Main Sequence
    Points: 4,679, Level: 46
    Level completed: 65%, Points required for next Level: 71
    Overall activity: 0%
    Achievements:
    365 Days+ Registered Achievement!50 Posts Achievement!5 Threads Achievement!First 1000 Experience Points750 Days+ Registered Achievement!
    Join Date
    Feb 2011
    Location
    Cork, Ireland
    Posts
    112
    Points
    4,679
    Level
    46
    Thanks
    4
    Thanked 23x 23 Posts

    Default Is wide angle wasted on planetary viewing?



    Hi All,
    I've read somewhere that wide angle is wasted on high power ~200x viewing. Does anyone have any views on this. The reason I ask is that I am contemplating either an Explore Scientific 82 degree giving me about 190x for about €110 or a TMB Planetary 58 degree giving me 208x for about €45 for a 10" Dob. Is it worth the extra money. Thanks for any comments or suggestions
    Bart

  2. #2
    DaltonSkyGazer's Avatar
    DaltonSkyGazer is offline Super Moderator
    Points: 113,745, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    Got three Friends20+ Friends Achievement!200+ Posts Achievement!First 1000 Experience Points5+ Referrals Achievement!
    Join Date
    Mar 2010
    Location
    Western Massachusetts(New Marlborough)
    Posts
    6,033
    Points
    113,745
    Level
    100
    Thanks
    5,515
    Thanked 2,897x 2,122 Posts
    Blog Entries
    4

    Default

    Quote Originally Posted by botoole View Post
    Hi All,
    I've read somewhere that wide angle is wasted on high power ~200x viewing. Does anyone have any views on this. The reason I ask is that I am contemplating either an Explore Scientific 82 degree giving me about 190x for about €110 or a TMB Planetary 58 degree giving me 208x for about €45 for a 10" Dob. Is it worth the extra money. Thanks for any comments or suggestions
    Bart

    Personally, I was quite in awe when I put my 13 Ethos onto Saturn not too long ago, great views plus all of the moons and larger background just made it pop in my own eye visually, I also like idea of having the added FOV so I can get some great cluster views. Mine was attached to a 12" SCT I should point this out, where the FOV is very small to begin with.

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


    12" LX-200 GPS w UltraWedge, 800 HD OTA, CGEM, 80mm Meade APO,
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ST80, Orion Mini Guide
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ,
    DSI IIIC/Orion SSAG/Canon T2i /Canon 450/Sac-8/Meade LPI, Explora Dome Observatory with heated Control Room, Many cases of accessories and oddball gizmos

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

    I'd rather die while I'm living than live while I'm dead. ” ― Jimmy Buffett

  3. #3
    mplanet62's Avatar
    mplanet62 is offline SUPER GIANT
    Points: 7,498, Level: 60
    Level completed: 74%, Points required for next Level: 52
    Overall activity: 0%
    Achievements:
    Ghost Achievement! Averaging 5+ posts a day!200+ Posts Achievement!Visitor Messenger Achievement!Got three FriendsFirst 1000 Experience Points
    Join Date
    Aug 2010
    Location
    @
    Posts
    1,223
    Points
    7,498
    Level
    60
    Thanks
    638
    Thanked 493x 367 Posts

    Default

    Not true. Wide angle is quite handy, with high magnification even more so. I don't wish to trouble you with theory on this. TMB is a damn good EP - I owe one. But if you are able to spend more on Explore Scientific - it must be presumably better at this sort of price. Not in direct proportion to the price, though.

  4. #4
    Astro-Baby's Avatar
    Astro-Baby is offline Bright Giants
    Points: 4,167, Level: 43
    Level completed: 45%, Points required for next Level: 83
    Overall activity: 0%
    Join Date
    Mar 2011
    Location
    Surrey, UK
    Posts
    563
    Points
    4,167
    Level
    43
    Thanks
    0
    Thanked 503x 262 Posts

    Default

    Depends on the scope. For me with a tracking mount its not so crucial as the mount can keep the target in the centre of the EP. When you have dob users who dont like nudging their scopes cos of the vibrations etc a wider angle is handy as the target stays in the EP longer. This is only worthwhile if the EP has good correction out to its edge.

    The new ES 120' FOV - at almost $1000 - hmmm not sure about. Personally I like views out to about 70' for deep sky targets but I find 100' to be of diminishing value.

    With the ES 100' EP I have though what makes it good is not its 100' FOV its the clarity of the glass. Looking at the Swan Nebula in a direct comparison with a Hyperion 13mm really showed the Explore Scientifics advantage - the view was cleare, brighter and much more defined. It almost looked like a Swan in fact
    Thirty spokes meet at the nave, because of the hole we may use the wheel.
    A cup is moulded from clay, because of the hollow we may use the cup.
    Four walls surround a hearth, because of the doors we may use the house.
    Thus tools come from what exists, but use from what does not.

  5. #5
    j.gardavsky's Avatar
    j.gardavsky is online now Super Moderator
    Points: 110,847, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 99.6%
    Achievements:
    Ghost Achievement! Averaging 5+ posts a day!200+ Posts Achievement!400+ Posts AchievementFirst 1000 Experience Points365 Days+ Registered Achievement!
    Awards:
    3rd Most Active Award
    Join Date
    Feb 2011
    Location
    Germany
    Posts
    14,391
    Points
    110,847
    Level
    100
    Thanks
    14,389
    Thanked 8,779x 5,716 Posts

    Default

    Hello Bart,

    if it is just about the planets, and small planetary nabulas, the dedicated planetary EP with about 55deg field of view gives you slightly more contrast and brightness, if comared with the wide angle EPs.

    If it is more about the DSOs, like the globular clusters, a wide angle EP on large scopes is preferable.

    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.

  6. #6
    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

    Guess I disagree with the others...

    For Lunar or Planatary observations I have absolutely positively NO USE for a wide angle eyepiece... the target is small and is the same size in both wide angle and regular eyepieces if both gve you the same magnification BUT it sure appears smaller in a wide angle eyepiece simply because you have a heck of a lot of extra sky surrounding the target...

    I do use wide angle eyepieces when I am looking at DSO's especially open clusters but for views of Jupiter Saturn or the Moon I'll personally personally use a regular FOV eyepiece every night which also marginally helps the contrast and my own ability to get a hair more detail out of what I see...

    Just my own opinion....

    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.

  7. #7
    astronut's Avatar
    astronut is offline HYPER GIANT
    Points: 11,566, Level: 74
    Level completed: 39%, Points required for next Level: 184
    Overall activity: 0%
    Achievements:
    10 Days registered200+ Posts Achievement!First 1000 Experience PointsGot three Friends365 Days+ Registered Achievement!
    Join Date
    Jun 2010
    Location
    Valparaiso Indiana
    Posts
    1,550
    Points
    11,566
    Level
    74
    Thanks
    43
    Thanked 527x 376 Posts

    Default

    My take on this from actual use is this,
    IF your scope is undriven UWA eyepieces are a God send period.
    Especially at hi mags such as on the Planets or Moon.
    I agree tho that if your scope has a driven mount the contrast thru less glass combinations is superior & brighter in a 4 to 5 lens type of eyepiece IF its a high quality eyepiece.
    Dobs especially need UWA eyepieces if you can swing a few due to the constant nudging necessary to use them.
    I use TV 4 lens plossels in my small refractor verses my UWA eyepieces since its on a driven mount & the view is much brighter using them, on my Dob the wide ange is a real plus and the aperture of 8" can more then handle any lower contrast or slight dimming etc...........
    Dave
    Z 8"/ 8" Baader SF/ 12v powertank/Dewbuster
    4" DIY SF/ 1.25" OIII filter
    TV32plossel/GSO10,15,20,25,SWF
    Starbound chair, Vixen 6mm & 15mm NLVs
    Pentax 7X50, TV 2.5 X/Z 2" 30mm WF/C 6.3FR
    C6SE / Celestron Onyx 80EDF / Cube Pro GPS / 12.5 & 9mm UO Orthos

  8. #8
    Talitha's Avatar
    Talitha is offline Bright Giants
    Points: 5,347, Level: 49
    Level completed: 99%, Points required for next Level: 3
    Overall activity: 0%
    Achievements:
    Got three Friends365 Days+ Registered Achievement!First 1000 Experience Points200+ Posts Achievement!750 Days+ Registered Achievement!
    Join Date
    Oct 2010
    Location
    USA
    Posts
    388
    Points
    5,347
    Level
    49
    Thanks
    153
    Thanked 231x 141 Posts

    Default

    Quote Originally Posted by astronut View Post
    My take on this from actual use is this,
    IF your scope is undriven UWA eyepieces are a God send period.
    Especially at hi mags such as on the Planets or Moon.
    For the the planets, yes. But it's not too much of an issue for lunar observing because the Moon's eastward orbit actually slows down the movement in the eyepiece. Using the 16"LB, i can easily use the 9 UO ortho (209x, 12.7' fov, 43*) instead of the 9 SWAN (21.3' fov, 72*), and the old Celestron Ultima 5mm (366x, 8.2' fov, 50*) instead of the 5mm Nagler (13.4' fov, 82*).
    By way of experimentation, i tried the 9 UO and 5 Ultima on Jupiter and almost got whiplash.

    In reply to Bart...
    Assuming your Dob doesn't have tracking, your high power viewing will be a much better experience using wide fov ep's. After getting the 16"LB (f/4.5) last summer, i used my existing eyepieces for a few months and found that although the Plossls gave very acceptable views, i kept turning to the 9mm SWAN (203x) and 13.8mm Meade SWA (133x) because of the wider fov.
    So i decided to get some more wide ep's and now have two medium power from University Optics, a 16mm (114x, 80*) and an 11mm (166x, 80*) along with two high power, a 7mm Axiom (261x, 82*), and a 5mm Nagler (366x, 82*). Great views all around.

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

    j.gardavsky (09-04-2011)

  10. #9
    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

    As you can see -- it's a personal choice. For high magnification I personally use a TMB planetary-- it has reasonably good eye relief -- sort of a large GLASS eyepiece (not a tiny hole)-- and good field of view.

    The Televue Radian line is also good for planetary observation.
    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.

  11. #10
    botoole's Avatar
    botoole is offline Main Sequence
    Points: 4,679, Level: 46
    Level completed: 65%, Points required for next Level: 71
    Overall activity: 0%
    Achievements:
    365 Days+ Registered Achievement!50 Posts Achievement!5 Threads Achievement!First 1000 Experience Points750 Days+ Registered Achievement!
    Join Date
    Feb 2011
    Location
    Cork, Ireland
    Posts
    112
    Points
    4,679
    Level
    46
    Thanks
    4
    Thanked 23x 23 Posts

    Default

    Thanks everyone. The funds are somewhat depleted due to new 10" Dob (what a difference to my previous 6" Newt on GEM!) and medium power ES EP plus Wixey etc. Will see how I get on with my existing EPs, review these replies, and then decide how to go. Thanks for all your interesting replies. Thought provoking, and in some cases, potentially wallet busting!

 

 
Page 1 of 2 12 LastLast

Similar Threads

  1. Wide angle eyepieces for ETX 125
    By altnacraig in forum ETX Telescope Forum
    Replies: 2
    Last Post: 08-15-2012, 07:33 PM
  2. wide-field vs plossl EP for planetary viewing
    By JoeThePro in forum Telescope Eyepieces Forum
    Replies: 18
    Last Post: 11-18-2011, 05:27 PM
  3. Wide Angle Planetary EP for $35 delivered
    By WWPierre in forum Telescope Eyepieces Forum
    Replies: 9
    Last Post: 12-03-2010, 03:10 AM
  4. Wide angle EP ....
    By outdoorsfellar in forum Dobsonian Telescopes Forum
    Replies: 2
    Last Post: 02-19-2010, 10:01 PM
  5. Wide angle and FOV
    By brucegooglegroups in forum Amateur Astronomy Forum
    Replies: 12
    Last Post: 10-13-2006, 12:53 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 10:23 PM.