Apochromatic doublet

Apochomatic Doublet

Is a lens with 2 types of glass processed against each other, where 1 type of glass has a low color error. Actually, an apochromat is a lens with 3 types of glass facing each other.

But due to current coating techniques, doublet lenses are also called apochromate. This is because they have the same optical values.

Manufacturers can thus deliver a good optical telescope cheaper to the customer.


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  • Nieuw
    Airy Disk 60ED grijs refractor f/5.5 Doublet

    Airy Disk 60ED grijs refractor f/5.5 Doublet

    Aperture (mm): 60
    Focal length (mm): 330
    Speed ​​(f): 5.5
    Rated 0 out of 5
     729,00
    Available
  • Nieuw
    Airy Disk 60ED refractor f/5.5 Doublet

    Airy Disk 60ED wit refractor f/5.5 Doublet

    Aperture (mm): 60
    Focal length (mm): 330
    Speed ​​(f): 5.5
    Rated 0 out of 5
     729,00
    Available
  • Nieuw
    Airy Disk APO 96mm f/6 ED Apochromatic Refractor

    Airy Disk APO 96mm f/6 ED Apochromatic Refractor

    Aperture (mm): 96
    Focal length (mm): 575
    Speed ​​(f): 6
    Rated 0 out of 5
     1.099,00
    Available
  • Askar 71F flat-field Quadruplet air-spaced APO

    Askar 71F flat-field Quadruplet air-spaced APO

    Aperture (mm): 71
    Focal length (mm): 490
    Speed ​​(f): 6.9
    Rated 0 out of 5
     735,00
    Ask us for the delivery time
  • William Optics ZenithStar 61 II Apo Goud

    Occasion William Optics ZenithStar 61II goud APO telescoop

    Aperture (mm): 61
    Focal length (mm): 360
    Speed ​​(f): 5.9
    Rated 0 out of 5
     599,00
    Ask us for the delivery time
  • Gratis Uniguide 32
    William Optics Cat 91 WIFD f/4.9

    William Optics Cat 91 WIFD f/4.9

    Aperture (mm): 91
    Focal length (mm): 448
    Speed ​​(f): 4.9
    Rated 0 out of 5
     3.199,00
    Available
  • William Optics MiniCat 51 WIFD

    William Optics MiniCat 51 WIFD

    Aperture (mm): 51
    Focal length (mm): 178
    Speed ​​(f): 3.5
    Rated 0 out of 5
     1.049,00
    Available
  • William Optics ZenithStar 61 II Apo Goud

    William Optics ZenithStar 61II goud APO telescoop

    Aperture (mm): 61
    Focal length (mm): 360
    Speed ​​(f): 5.9
    Rated 0 out of 5
     799,00
    Ask us for the delivery time
  • William Optics ZenithStar 61 II Apo Grijs

    William Optics ZenithStar 61II grijs APO telescoop

    Aperture (mm): 61
    Focal length (mm): 360
    Speed ​​(f): 5.9
    Rated 0 out of 5
     799,00
    Ask us for the delivery time
  • William Optics ZenithStar 61 II Apo Rood

    William Optics ZenithStar 61II rood APO telescoop

    Aperture (mm): 61
    Focal length (mm): 360
    Speed ​​(f): 5.9
    Rated 0 out of 5
     799,00
    Ask us for the delivery time
  • William Optics ZenithStar 81 Goud APO

    William Optics Zenithstar 81 Goud APO FLAT6AIII Package

    Aperture (mm): 81
    Focal length (mm): 558.9
    Speed ​​(f): 6.9
    Rated 0 out of 5
     1.285,00
    Ask us for the delivery time
  • William Optics ZenithStar 81 Rood APO

    William Optics Zenithstar 81 Rood APO FLAT6AIII Package

    Aperture (mm): 81
    Focal length (mm): 558.9
    Speed ​​(f): 6.9
    Rated 0 out of 5
     1.285,00
    Ask us for the delivery time
  • William Optics Zenithstar 81 WIFD ATT Special free accessories

    William Optics Zenithstar 81 WIFD

    Aperture (mm): 81
    Focal length (mm): 559
    Speed ​​(f): 6.9
    Rated 0 out of 5
     1.399,00
    Available
  • Offers
    ZWO FF107 Quadruplet APO

    ZWO FF107 Quadruplet APO

    Aperture (mm): 107
    Focal length (mm): 749
    Speed ​​(f): 7
    Rated 0 out of 5
    Sale! Original price was: € 2.969,00.Current price is: € 2.599,00.
    Ask us for the delivery time
  • ZWO FF65 APO

    ZWO FF65 quintuplet APO

    Aperture (mm): 65
    Focal length (mm): 416
    Speed ​​(f): 6.4
    Rated 0 out of 5
     1.199,00
    Available
  • Black Friday Deal
    ZWO FF80 Quadruplet APO

    ZWO FF80 Quadruplet APO

    Aperture (mm): 80
    Focal length (mm): 600
    Speed ​​(f): 7.5
    Rated 0 out of 5
    Sale! Original price was: € 1.789,00.Current price is: € 1.499,00.
    Available
  • William Optics Guide Star 61 APO telescoop

    William Optics Guide Star 61 APO telescoop

    Aperture (mm): 61
    Focal length (mm): 360
    Speed ​​(f): 5.9
    Rated 0 out of 5
     399,00 499,00
    This product has multiple variants. The options may be chosen on the product page
    Delivery time: make your choice
  • William Optics ZenithStar 73 APO Goud

    William Optics ZenithStar 73 APO Goud

    Aperture (mm): 73
    Focal length (mm): 430.7
    Speed ​​(f): 5.9
    Rated 0 out of 5
     899,00
    Ask us for the delivery time
  • William Optics ZenithStar 73 APO Rood

    William Optics ZenithStar 73 APO Rood

    Aperture (mm): 73
    Focal length (mm): 430.7
    Speed ​​(f): 5.9
    Rated 0 out of 5
     899,00
    Ask us for the delivery time
  • TecnoSky ED APO Refractor 70/420 F/6

    TecnoSky ED APO Refractor 70/420 F/6

    Aperture (mm): 70
    Focal length (mm): 420
    Speed ​​(f): 6
    Rated 0 out of 5
     395,00
    Ask us for the delivery time
  • William Optics Star 71 APO Refractor f/4.9

    William Optics Star 71 APO f/4.9

    Aperture (mm): 71
    Focal length (mm): 347.9
    Speed ​​(f): 4.9
    Rated 0 out of 5
     1.375,00
    Ask us for the delivery time
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