Results 1 to 7 of 7
Like Tree18Likes
  • 10 Post By Don Kittrell
  • 2 Post By BobDob
  • 3 Post By Lowjiber
  • 3 Post By helicon64

Thread: Enjoying High Power Views with a "Low Power" scope

  1. #1
    Don Kittrell's Avatar
    Don Kittrell is offline SUPER GIANT
    Points: 13,646, Level: 80
    Level completed: 56%, Points required for next Level: 154
    Overall activity: 0%
    Achievements:
    200+ Posts Achievement!First 1000 Experience Points365 Days+ Registered Achievement!400+ Posts Achievement50 Posts Achievement!
    Join Date
    Mar 2011
    Location
    So. Cal.
    Posts
    698
    Points
    13,646
    Level
    80
    Thanks
    285
    Thanked 373x 233 Posts
    Blog Entries
    12

    Default Enjoying High Power Views with a "Low Power" scope



    My Orion StarBlast 4.5 is an inherently low power instrument due to its 114mm mirror, 450mm focal length and rather fast f4 focal ratio. It's intended best for wide field views of star fields, clusters and various other DSO's. At least that's the way Orion markets the scope. Lately, however, I've been enjoying some high powered viewing with this little scope. Using a Meade 5000 5.5mm plossl and my Orion Shorty 2x Barlow I get 164x and the views have been tremendous. Over these past two weekends I've viewed Izar and Porrima several times. These two binaries both have 2.8" separations. I had never split either before. Tonight I split Delta Geminorum for the first time. This has a wider split at 6.5" but there is a 5 mag difference between the components which makes splitting difficult at lower powers. Castor and Algeiba are awesome at high power. I just love how their diffraction rings emanate outward into the blackness. Jupiter and Saturn take on a new perspective. Tonight Io's shadow was prominent and there was good definition of the two main belts and a couple of lesser ones.

    The Moon was awesome. Rima Hyginus had just emerged from the terminator and I was starring right down on top of it. Posidonius still showed a good amount of detail even though somewhat removed from the terminator. The area around Eudoxus and Aristoteles had great clarity. The crater Albategnius was almost in complete shadow but its central peak was protruding out of the darkness which was a pretty awesome site. The shadow effects in the southern highlands were quite interesting to look at. Truly a great way to be viewing the Moon.

    I was indeed impressed by the StarBlast's performance. I've owned the scope for two years but have never really done much high power viewing like this. I never knew what I was missing.
    BobDob, AbbN, j.gardavsky and 7 others like this.
    -Don-
    Orion StarBlast 4.5 mounted on an Orion Tritech II Field Tripod

  2. The Following User Says Thank You to Don Kittrell For This Useful Post:

    BobDob (04-07-2014)

  3. #2
    BobDob's Avatar
    BobDob is offline Super Moderators
    Points: 54,091, 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
    Mar 2009
    Location
    Port Angeles, Washington
    Posts
    7,113
    Points
    54,091
    Level
    100
    Thanks
    5,234
    Thanked 2,895x 1,924 Posts

    Default Re: Enjoying High Power Views with a "Low Power" scope

    Good report Don! Interesting results with such a small/fast reflector, surprisingly so!

    Clear skies...Bob
    Don Kittrell and MoosBros like this.
    6 inch F/5 GEM mounted reflector

    The Forum Rules, or Terms of Service:
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    >)))))*>

  4. #3
    Lowjiber's Avatar
    Lowjiber is offline Urban Astronomer
    Points: 211,530, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!50 Posts Achievement!5 Threads Achievement!200+ Posts Achievement!
    Awards:
    Highest Experience Award
    Join Date
    Jun 2013
    Location
    Las Vegas, Nv, about two miles south of the "strip".
    Posts
    12,251
    Points
    211,530
    Level
    100
    Thanks
    4,205
    Thanked 4,522x 3,540 Posts
    Blog Entries
    6

    Default Re: Enjoying High Power Views with a "Low Power" scope

    Nice report, Don.

    Coming from someone with your experience, such a report makes me start thinking about pushing my short f/5 Newt a bit. I've always limited myself to 5mm EP with it, but if the darn wind ever settles the atmosphere here in the desert, I'm going to at least try something similar with a 3mm EP.

    Thanks for the "tip".

    Clear Skies
    BobDob, Don Kittrell and MoosBros like this.
    John (Urban Astronomer)
    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.
    Dob; XLT 150 Dob; XLT 120EQ; Lunt Solar 60 PT/B1200; ES AR102; SW Pro 100ED; 2 SW Pro 80ED's; 90mm Eq; WO Z-61; SW 90mm Virtuso Mak; 2
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ST-80's; Quark-C; Cams: ASI120MM-S, ASI174MM & ASI174MM-cooled


    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.

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

  5. #4
    helicon64's Avatar
    helicon64 is offline Indy the cat
    Points: 134,833, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 3.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!50 Posts Achievement!Ghost Achievement! Averaging 5+ posts a day!200+ Posts Achievement!
    Awards:
    Most Friends Award!
    Join Date
    Jul 2012
    Location
    Berkeley, CA
    Posts
    22,663
    Points
    134,833
    Level
    100
    Thanks
    23,733
    Thanked 6,969x 5,426 Posts

    Default Re: Enjoying High Power Views with a "Low Power" scope

    Thanks for the nice report. The lesson is that we who own fast f-ratio scopes shouldn't be afraid to ramp up the power...
    Michael
    Obsession 18" f/4.2, Zhumell Z10 f/4.9, ES AR 152 refractor f/6.5, Celestron Skymaster 15x70's , Bushnell 10x50's
    9x50mm RACI finder, Telrad, Rigel Quickfinder, 30mm Erfle, 9mm Plossl, and full line of ES eyepieces
    Imagination is more important than knowledge. Knowledge is Limited. Imagination Circles the World... A. Einstein


  6. #5
    star2root's Avatar
    star2root is offline SUPER GIANT
    Points: 15,305, Level: 85
    Level completed: 30%, Points required for next Level: 245
    Overall activity: 0%
    Achievements:
    5 Threads Achievement!50 Posts Achievement!5+ Referrals Achievement!200+ Posts Achievement!First 1000 Experience Points
    Join Date
    Feb 2012
    Location
    Miami, Florida, USA
    Posts
    1,062
    Points
    15,305
    Level
    85
    Thanks
    97
    Thanked 336x 277 Posts

    Default Re: Enjoying High Power Views with a "Low Power" scope

    Quote Originally Posted by Don Kittrell View Post
    My Orion StarBlast 4.5 is an inherently low power instrument due to its 114mm mirror, 450mm focal length and rather fast f4 focal ratio. It's intended best for wide field views of star fields, clusters and various other DSO's. At least that's the way Orion markets the scope. Lately, however, I've been enjoying some high powered viewing with this little scope. Using a Meade 5000 5.5mm plossl and my Orion Shorty 2x Barlow I get 164x and the views have been tremendous.
    A 114mm diameter scope has a theoretical maximum practical magnification of around 228x, or twice the diameter, and I have found with decent observing conditions I can frequently push my scope to magnify 1.5x its diameter. One and a half times 114mm is 171x, so I agree that should be achievable, however because of your short focal length, the challenge will be to find eyepieces that have enough eye relief and aperture to view through that have a short enough focal length. I use a 5.1mm Orion Epic ED eyepiece for high power viewing. You would have to barlow that or use something with an even shorter focal length. A good quality ED eyepiece should help your views at high power quite a bit though, and make them even better.
    Scopes:Meade DS2130AT 130mm reflector on ALT/AZ
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    mount. Takes 0.965,1.25,2 inch eyepieces./Celestron C-60 60mm refractor on manual ALT/AZ mount. Takes 0.965 inch eyepieces./Meade 152mm newtonian reflector on Meade LXD75 GEM goto mount. Takes 1.25,2 inch eyepieces.
    Eyepieces:0.965 inches: 25mm Kelner, 12.5mm, 8mm, 4mm, 25mm Meade MA/1.25 inches: 25mm Plossl, 10mm Plossl, 5.1 mm Epic ED-2, Owl 24-8mm zoom
    Barlows:0.965 inches: 2x and 3x barlows/1.25 inches: 2x achromatic shorty
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    Camera:
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Starshoot usb IV/Canon T2i
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  7. The Following User Says Thank You to star2root For This Useful Post:

    Don Kittrell (04-07-2014)

  8. #6
    MoosBros's Avatar
    MoosBros is offline HYPER GIANT
    Points: 14,903, Level: 84
    Level completed: 16%, Points required for next Level: 297
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!200+ Posts Achievement!
    Join Date
    Dec 2013
    Location
    South Carolina
    Posts
    2,990
    Points
    14,903
    Level
    84
    Thanks
    408
    Thanked 464x 426 Posts

    Default Re: Enjoying High Power Views with a "Low Power" scope

    and there you have it folks---nice report !!

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    6-7 Bob--aka--<> urban guerrilla star gazer <> YURT Urban Mobile Observatory
    Zhumell Tachyon 25x100, Celestron Comet Hunter 11x80, Zhumell z12 f/4.92 w/HALO--StellarVue F80M2 80mm f/4--Vixen R130Sf
    Zhumell 2" 2x ED Barlow, TeleVue 2x Big Barlow
    Explore Scientific 100* Series-----5.5mm, 9mm, 14mm, 20mm, ES 82* Series-----30mm
    Thousand Oaks 2" O-III , DGM 2" NPB

  9. #7
    Makuser's Avatar
    Makuser is offline Proud to be a member here
    Points: 126,429, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 99.8%
    Achievements:
    2 Posts Achievement20 Posts Achievement!50 Posts Achievement!200+ Posts Achievement!5 Threads Achievement!
    Awards:
    Community Award
    Join Date
    Sep 2012
    Location
    Rockledge, Florida
    Posts
    24,162
    Points
    126,429
    Level
    100
    Thanks
    4,444
    Thanked 8,825x 7,377 Posts

    Default Re: Enjoying High Power Views with a "Low Power" scope

    Hi Don. Sometimes on a good night you never can tell just how high you can go with the magnification, especially on the moon, planets, and on double star splitting. Thanks for your excellent report Don, and best wishes for another great night like this again soon.
    - Marshall

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Astroview 120ST f/5 Refractor on EQ3 mount
    Celestron Omni XLT150R f/5 Refractor on CG4 mount with dual axis drives.
    Orion 180mm f/15 Maksutov-Cassegrain on CG5-GT
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    mount.
    Orion XT12i 12" f/4.9
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Intelliscope.
    Celestron SkyMaster 15x70 Binoculars. ZWO ASI120MC camera.
    >)))))*>

 

 

Similar Threads

  1. Best High Power EP for 10" Dob
    By StarBiker in forum Telescope Eyepieces Forum
    Replies: 23
    Last Post: 02-04-2013, 03:01 PM
  2. trying to understand CMB "angular power spectrum" ?
    By Widdekind in forum Astrophysics Forum
    Replies: 4
    Last Post: 11-17-2012, 02:23 AM
  3. Does the brain shift optical "power" to whichever eye is on the EP?
    By gremmy in forum Astronomy Beginners Forum
    Replies: 9
    Last Post: 07-06-2012, 09:29 AM
  4. High Power EP for 12" Lightbridge
    By KevinDuch in forum Telescope Eyepieces Forum
    Replies: 6
    Last Post: 05-19-2012, 08:46 AM
  5. Russell Optics 2" high power EP: Thoughts, opinions, and comments?
    By keyroute in forum Telescope Eyepieces Forum
    Replies: 2
    Last Post: 05-17-2012, 07:34 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 09:18 AM.