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  1. Vignetting with focal reducer

    Started by DaveW, 11-23-2010 03:01 AM
    • Replies: 2
    • Views: 1,881
    Last Post: 01-15-2018 05:50 AM
    by Gabby76  Go to last post
  2. 16 year old "amaturer" Astronomer from Adelaide

    Started by Stargazer., 06-09-2015 04:39 AM
    3 Pages
    1 2 3
    astronomy, celestron 130eq, focal, telescope
    • Replies: 23
    • Views: 1,344
    Last Post: 06-10-2015 07:42 PM
    by JohnP_1  Go to last post
  3. Sticky Thread Sticky: Calculating Magnification of Telescope from Eyepiece and Focal Length

    Started by admin, 12-04-2008 10:41 PM
    5 Pages
    1 2 3 ... 5
    • Replies: 45
    • Views: 41,816
    Last Post: 04-18-2015 02:09 PM
    by BobDob  Go to last post
  4. Short Focal Length and Barlows

    Started by sneeds, 10-20-2010 08:22 AM
    barlows, focal, length, short
    • Replies: 4
    • Views: 1,492
    Last Post: 02-13-2015 10:34 PM
    by KathyNS  Go to last post
  5. Optec 0.7 focal reducer for f/8 'APO' use

    Started by klaatu2u, 10-02-2009 12:48 PM
    apo, f or 8, focal, optec, reducer
    • Replies: 2
    • Views: 1,836
    Last Post: 01-08-2015 04:06 PM
    by rkayakr  Go to last post
    • Replies: 2
    • Views: 583
    Last Post: 12-18-2014 06:42 AM
    by bushlaibi  Go to last post
  6. Questions about focal reducer and filters/t-adapter...

    Started by ashleyy, 10-30-2014 08:14 PM
    3 Pages
    1 2 3
    filter, focal, reducer, t-adapter
    • Replies: 24
    • Views: 2,965
    Last Post: 11-04-2014 10:12 PM
    by Hondo  Go to last post
  7. Sticky Thread Sticky: Useful Eyepiece Focal Lengths

    Started by star drop, 01-17-2009 07:05 PM
    3 Pages
    1 2 3
    eyepiece, focal, lengths
    • Replies: 21
    • Views: 19,995
    Last Post: 04-23-2014 07:40 PM
    by ARMANDII  Go to last post
  8. Calculating focal length equivalent with Webcam

    Started by Emu, 12-02-2009 11:09 AM
    2 Pages
    1 2
    • Replies: 17
    • Views: 6,082
    Last Post: 03-04-2014 04:43 PM
    by AustinPSD  Go to last post
  9. Sticky Thread Sticky: The

    Started by admin, 05-13-2010 02:31 AM
    2 Pages
    1 2
    camera, digital, dslr, focal, focusing, reducer
    • Replies: 13
    • Views: 19,565
    Last Post: 08-25-2013 05:16 PM
    by PeterT  Go to last post
    • Replies: 26
    • Views: 7,115
    Last Post: 05-03-2013 12:50 PM
    by AustinPSD  Go to last post
  10. Is a barlow (or reducer) really necessary?

    Started by nouaf, 12-01-2012 08:50 AM
    3 Pages
    1 2 3
    barlow, blur, eyepiece, focal, large
    • Replies: 22
    • Views: 2,221
    Last Post: 12-06-2012 04:08 AM
    by nouaf  Go to last post
  11. Focal Telescope (HELP)

    Started by Space&Heps, 05-17-2012 07:01 AM
    2 Pages
    1 2
    focal, japan
    • Replies: 11
    • Views: 4,661
    Last Post: 05-23-2012 03:57 AM
    by Space&Heps  Go to last post
  12. Focal Reducer for M51?

    Started by blaise, 05-01-2010 01:35 PM
    • Replies: 4
    • Views: 841
    Last Post: 04-02-2012 08:48 AM
    by jaetea  Go to last post
  13. Low power eyepieces and focal reducer

    Started by norskeob, 10-05-2010 10:44 PM
    • Replies: 2
    • Views: 1,749
    Last Post: 03-14-2012 06:12 PM
    by 8HHaggis  Go to last post
  14. Do you have a stripped focal tube?

    Started by Digital Chaos, 07-23-2011 11:04 PM
    focal, stripped, tube
    • Replies: 3
    • Views: 848
    Last Post: 08-15-2011 09:10 PM
    by AndrewD  Go to last post
  15. meade lx200 10" w/celestron focal reducer focus?

    Started by judothrow, 07-15-2011 08:22 PM
    focal, focus, meade lx, reducer, w or celestron
    • Replies: 5
    • Views: 1,839
    Last Post: 07-16-2011 10:47 PM
    by DaltonSkyGazer  Go to last post
    • Replies: 12
    • Views: 1,500
    Last Post: 07-15-2011 02:34 PM
    by Vali x  Go to last post
  16. Would a f6.3 Focal Reducer help?

    Started by marylandbiscuits, 06-23-2011 09:12 AM
    • Replies: 6
    • Views: 2,874
    Last Post: 07-15-2011 12:57 AM
    by CKemu  Go to last post
  17. Focal reducer for Mak telescope

    Started by david brown, 06-01-2011 11:16 AM
    focal, mak, reducer, telescope
    • Replies: 5
    • Views: 4,030
    Last Post: 06-30-2011 06:57 AM
    by sxinias  Go to last post
  18. Fast Focal Ratio V'S Slow Focal Ratio

    Started by Tarantr, 06-15-2011 09:04 AM
    fast, focal, ratio, slow
    • Replies: 1
    • Views: 2,032
    Last Post: 06-15-2011 12:58 PM
    by dmbryan  Go to last post
  19. LX200 f6.3, DSI 2, and a focal reducer?

    Started by budman1961, 06-12-2011 08:52 PM
    dsi, f63, focal, lx200, reducer
    • Replies: 3
    • Views: 1,411
    Last Post: 06-13-2011 04:39 PM
    by Skyhawk727  Go to last post
  20. 1000mm focal length at F6.6 v 750mm/F5?

    Started by TimH, 06-10-2011 05:33 AM
    2 Pages
    1 2
    1000mm, 750mm or f5, f66, focal, length
    • Replies: 16
    • Views: 2,448
    Last Post: 06-13-2011 04:09 AM
    by sxinias  Go to last post
  21. Focal Reducer and Coma Corrector, setup?

    Started by DMouse, 06-01-2011 01:24 PM
    coma, corrector, focal, focal reducer, mpcc, reducer, setup
    • Replies: 2
    • Views: 1,465
    Last Post: 06-02-2011 05:09 AM
    by DMouse  Go to last post
  22. Orion StarShoot IV - Focal Length

    Started by jstrong611, 05-10-2011 11:11 AM
    focal, length, orion, starshoot
    • Replies: 3
    • Views: 1,762
    Last Post: 05-15-2011 06:22 PM
    by AlanP  Go to last post
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