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Refractor type Telescopes

Discuss your refractor type scopes here.
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  • Achromat Vs Semi-APO Vs APO - What's The Difference?
    by JayTee »
    59 Replies
    21340 Views
    Last post by Bigzmey
  • How exact does the eyepiece-focuser-diagonal alignment to the objective need to be?
    by realflow100 »
    7 Replies
    215 Views
    Last post by turboscrew
  • Reflected and scattered light in the zenith diagonal mirror
    by j.gardavsky »
    3 Replies
    121 Views
    Last post by j.gardavsky
  • Scattering of light in the refractor optical tube assemblies
    by j.gardavsky »
    9 Replies
    358 Views
    Last post by j.gardavsky
  • A 30$ svbony SV501 telescope. slight modification.
    by realflow100 »
    0 Replies
    107 Views
    Last post by realflow100
  • Is this a good one?
    by Capt. Midnight »
    5 Replies
    252 Views
    Last post by Ylem
  • cheap 70mm refractor telescope F5.1 testing again
    by realflow100 »
    10 Replies
    304 Views
    Last post by realflow100
  • Whats the typical maximum resolution in arcseconds of a 70mm achromat/doublet refractor?
    by realflow100 »
    7 Replies
    194 Views
    Last post by John Baars
  • My new baby...
    by AstroBee »
    23 Replies
    935 Views
    Last post by chris_g
  • Picked up this little beauty today.
    by Gmetric »
    25 Replies
    1181 Views
    Last post by Gmetric
  • is it better to correct doublet for center to edge sharpness. or for some other aberration?
    by realflow100 »
    18 Replies
    698 Views
    Last post by realflow100
  • Astro Tech 115 APO ED triplet (engaged impulse drive)
    by mikemarotta »
    16 Replies
    1138 Views
    Last post by Bigzmey
  • APM 140mm ED, my next intended.
    by 25585 »
    29 Replies
    1506 Views
    Last post by 25585
  • Would You Spend $100 On This Telescope?
    by Refractordude »
    12 Replies
    509 Views
    Last post by Richard
  • Created A Quickie For Days When Tired
    by Refractordude »
    7 Replies
    386 Views
    Last post by dagadget
  • Achromatic and apochromatic doublets
    by James »
    33 Replies
    1829 Views
    Last post by dagadget
  • Your refractor - let's see it
    by Nakedgun »
    58 Replies
    5078 Views
    Last post by dagadget
  • Refractor overload in 2021!
    by Lady Fraktor »
    9 Replies
    1009 Views
    Last post by dagadget
  • AT70ED
    by pakarinen »
    11 Replies
    468 Views
    Last post by pakarinen
  • Binoviewer friendly 4" Apo?
    by Virtus »
    11 Replies
    489 Views
    Last post by WilliamPaolini
  • AT-60ED, how is yours?
    by John Fitzgerald »
    0 Replies
    225 Views
    Last post by John Fitzgerald
  • iOptron ST90?
    by pakarinen »
    4 Replies
    541 Views
    Last post by John Fitzgerald
  • Going lighter
    by Ken_nneth »
    3 Replies
    359 Views
    Last post by mikemarotta
  • 130mm Truss Tube Refractor
    by Jones »
    22 Replies
    4622 Views
    Last post by Jones
  • Telescope Hunting
    by Don_S »
    4 Replies
    308 Views
    Last post by Lady Fraktor
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