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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  • 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
    Sale!  699,00
    Beschikbaar via nabestelling
  • 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
    Sale!  699,00
    Beschikbaar via nabestelling
  • 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
    Sale!  699,00
    Beschikbaar via nabestelling
  • 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
    Delivery time: 1 to 3 business days
  • 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
    Beschikbaar via nabestelling
  • ZWO FF107 Quadruplet APO

    ZWO FF107 Quadruplet APO

    Aperture (mm): 107
    Focal length (mm): 749
    Speed ​​(f): 7
    Rated 0 out of 5
     2.969,00
    Delivery time: 1 to 3 business days
  • 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
    Delivery time: 1 to 3 business days
  • ZWO FF80 Quadruplet APO

    ZWO FF80 Quadruplet APO

    Aperture (mm): 80
    Focal length (mm): 600
    Speed ​​(f): 7.5
    Rated 0 out of 5
     1.789,00
    Delivery time: 1 to 3 business days
  • 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
    Delivery time: depends on 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
     869,00
    Beschikbaar via nabestelling
  • 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
     869,00
    Delivery time: 1 to 3 business days
  • 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
    Delivery time: 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
    Beschikbaar via nabestelling
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