Page 2 of 2 FirstFirst 12
Results 11 to 17 of 17
Like Tree11Likes

Thread: 6 inch compared to 10 inch

  1. #11
    Darkvillage's Avatar
    Darkvillage is offline White Dwarf
    Points: 408, Level: 8
    Level completed: 16%, Points required for next Level: 42
    Overall activity: 4.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!
    Join Date
    Jul 2017
    Location
    Westfield, Hastings, UK
    Posts
    36
    Points
    408
    Level
    8
    Thanks
    28
    Thanked 0x 0 Posts
    Downloads
    0
    Uploads
    0

    Default Re: 6 inch compared to 10 inch



    Thanks chaps, very helpful. As I don't travel with my scope, and the garden is level and easy, the size of a 10 inch should be ok. The tube is so easily removed from a Skywatcher with the two screw in handles that it's easily moved outside. We are lucky with a very dark village in the countryside. I might keep the 6 inch for possible travel to the beach for those big occasions, as I'm only 15 minutes from the sea. Sometimes a local astronomy club will invite all comers to a telescope fest at the coast. Could be fun.

    1-100_2124.JPG
    Last edited by Darkvillage; 07-17-2017 at 09:37 AM.
    Mike. cancer survivor (so far)
    Skywatcher 150 P plus smartphone attachment.
    Black whippet who keeps trying to trip me up in the dark.
    No, the photo is not upside down, the dog is.

  2. #12
    Reddog1972's Avatar
    Reddog1972 is offline Main Sequence
    Points: 1,628, Level: 24
    Level completed: 28%, Points required for next Level: 72
    Overall activity: 5.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!Gallery Achievement!50 Posts Achievement!
    Join Date
    May 2016
    Location
    New Jersey, USA
    Posts
    112
    Points
    1,628
    Level
    24
    Thanks
    2
    Thanked 23x 16 Posts
    Downloads
    0
    Uploads
    0

    Default Re: 6 inch compared to 10 inch

    I made that jump from a 6 inch tabletop dob to a 10 inch goto dob and the difference was staggering!
    Scopes: Orion XT10g w 8x50 RACI & Red Dot finder; Stellarvue SV70T w FF/FR @ 0.8x on Orion Atlas EQ-G w/ Stellarvue F50 Guidescope, SSAG & GLP; Celestron 9.25 on CG5 ASGT
    EPs: ES82° 8.8 & 30mm; ES68° 24mm; Meade UWA 82° 5.5 & 14mm; Orion Deepview 56° 28mm; 2x Barlow;
    Filters: Orion 13% Moon; Orion SkyGlow Broadband LP; Orion Ultrablock Narrowband LP
    Camera: Canon EOS Rebel T5
    Binos: 15x70 Skywatcher, 7x50 Cometron

  3. #13
    jenniferchristine's Avatar
    jenniferchristine is offline Jedi Moderator
    Points: 70,877, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 25.0%
    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
    10,815
    Points
    70,877
    Level
    100
    Thanks
    538
    Thanked 4,667x 3,101 Posts
    Downloads
    5
    Uploads
    0

    Default Re: 6 inch compared to 10 inch

    Light is collected in proportion to the square of the radius.
    So
    6 inch is a 9
    8 inch is a 16
    10 inch is a 25
    And a 12 inch is a 36.
    So you can see almost half as much again in a 12 as a10inch.
    NEQ6 Pro Mount.Meade LX90 ACF 8"OTA, Canon 450D (Rebel XSi) 18-55 and 75-300 lenses. Canon 70DW 18-135 USM. 4000 lens kit .Antares 6.3 focal reducer. Meade Wedge. Orion Starshoot Autoguider.
    Saxon 100 f9 Apo. Saxon20x80 Binoculars
    Skywatcher 102 x F5 guide scope/wide field scope. HYQ8L one shot colour camera. 10x10 shed with dome

  4. The Following User Says Thank You to jenniferchristine For This Useful Post:

    Darkvillage (07-17-2017)

  5. #14
    KT4HX's Avatar
    KT4HX is online now HYPER GIANT
    Points: 67,928, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 40.0%
    Achievements:
    365 Days+ Registered Achievement!First 1000 Experience Points750 Days+ Registered Achievement!1000 Days+ Registered Achievement!200+ Posts Achievement!
    Join Date
    Dec 2008
    Location
    Virginia
    Posts
    9,472
    Points
    67,928
    Level
    100
    Thanks
    281
    Thanked 5,822x 3,438 Posts
    Blog Entries
    158
    Downloads
    2
    Uploads
    0

    Default Re: 6 inch compared to 10 inch

    Looking at areas and light gathering numbers and percentages in and of themselves is vague in its real world implications. They look good on paper, but how do they translate to the field in quantifiable results? That is the real issue at hand.

    The best approach is to look at the most easily definable gain. That is magnitude. The step from 6 to 10 inches will give you just over 1 magnitude more reach. Moving to 16 inches will give you a 2 mag gain over the 6 inch, while going to 25 inches provides a 3 mag gain. However, that doesn't mean benefits are not to be had at the in-between points. Just that the visible gains are reduced accordingly. A good rule of thumb to keep in mind when planning to go to a larger aperture is to try and increase your reach by 1 magnitude. This will maximize your visible results.

    Experience is a big factor in this as well. Having a very experienced observer using a 6 inch as compared to a beginner with the same scope will yield significantly different results. Hope that helps.
    Alan || My DSO Blog:
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.

    ---------------------------------------------------------------------------
    Astro Sky 17.5 f/4.5 Dob || Apertura AD12 f/5 Dob || Zhumell Z10 f/4.9 Dob
    ES AR127 f/6.5 and ES ED80 f/6 on Twilight-II Mount
    ES 82° 24mm thru 4.7mm
    ---------------------------------------------------------------------------
    Astronomers: We look into the past to see our future.

  6. The Following 2 Users Say Thank You to KT4HX For This Useful Post:

    Darkvillage (07-17-2017),kanadalainen (07-19-2017)

  7. #15
    geoffl's Avatar
    geoffl is offline White Dwarf
    Points: 94, Level: 1
    Level completed: 88%, Points required for next Level: 6
    Overall activity: 1.0%
    Achievements:
    2 Posts Achievement
    Join Date
    Jul 2017
    Location
    North Somerset, UK
    Posts
    2
    Points
    94
    Level
    1
    Thanks
    0
    Thanked 0x 0 Posts
    Downloads
    0
    Uploads
    0

    Default Re: 6 inch compared to 10 inch

    I have the 250PX Synscan model. The base has a diameter of 53cm, so requires a "wide knee waddle" to get it over steps and through doorways, and, as being recently retired, the weight is towards the top end of my comfort zone for a short carry from garage to patio. The main tube is easier to negotiate out onto the mount.

    Geoff
    kanadalainen likes this.

  8. #16
    kanadalainen's Avatar
    kanadalainen is offline Bright Giants
    Points: 4,799, Level: 47
    Level completed: 25%, Points required for next Level: 151
    Overall activity: 70.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!First 1000 Experience Points
    Join Date
    Feb 2017
    Location
    Winnipeg, Canada
    Posts
    367
    Points
    4,799
    Level
    47
    Thanks
    337
    Thanked 325x 126 Posts
    Blog Entries
    1
    Downloads
    6
    Uploads
    0

    Default Re: 6 inch compared to 10 inch

    I've never owned a dob smaller than a 10". (I'm saving up for a small refractor). Its pretty big but I have moved it many times and never had a problem. I can see how it wouldn't be suitable for everyone though.
    Ian

    Scope: Orion XT10i dob - f 4.7, 1200 mm, Telrad and relocated RACI.
    EPs: ES82s, Naglers, Antares Speers-WALER stuff Chair: Berlebach Charon

    "Any sufficiently advanced technology is indistinguishable from divinity." - A.C. Clarke

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

  9. #17
    kanadalainen's Avatar
    kanadalainen is offline Bright Giants
    Points: 4,799, Level: 47
    Level completed: 25%, Points required for next Level: 151
    Overall activity: 70.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!First 1000 Experience Points
    Join Date
    Feb 2017
    Location
    Winnipeg, Canada
    Posts
    367
    Points
    4,799
    Level
    47
    Thanks
    337
    Thanked 325x 126 Posts
    Blog Entries
    1
    Downloads
    6
    Uploads
    0

    Default Re: 6 inch compared to 10 inch

    Quote Originally Posted by geoffl View Post
    I have the 250PX Synscan model. The base has a diameter of 53cm, so requires a "wide knee waddle" to get it over steps and through doorways, and, as being recently retired, the weight is towards the top end of my comfort zone for a short carry from garage to patio. The main tube is easier to negotiate out onto the mount.

    Geoff
    That waddle.... I know it!!
    Ian

    Scope: Orion XT10i dob - f 4.7, 1200 mm, Telrad and relocated RACI.
    EPs: ES82s, Naglers, Antares Speers-WALER stuff Chair: Berlebach Charon

    "Any sufficiently advanced technology is indistinguishable from divinity." - A.C. Clarke

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

 

 
Page 2 of 2 FirstFirst 12

Similar Threads

  1. How are the views in a Dobsonian 12 inches and up compared to an 8 inch?
    By cjjacobs97 in forum Dobsonian Telescopes Forum
    Replies: 30
    Last Post: 11-28-2016, 11:02 AM
  2. Exit Pupil effect - 6 Inch telescope brighter than 18 inch?
    By klokhed in forum Astronomy Beginners Forum
    Replies: 7
    Last Post: 07-25-2015, 06:14 PM
  3. Replies: 21
    Last Post: 09-13-2014, 08:03 PM
  4. Replies: 3
    Last Post: 07-06-2012, 05:00 AM

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 06:47 PM.