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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Airy Disk 60ED grijs refractor f/5.5 Doublet
Aperture (mm): 60Focal length (mm): 330Speed ​​(f): 5.5Available -
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Airy Disk 60ED wit refractor f/5.5 Doublet
Aperture (mm): 60Focal length (mm): 330Speed ​​(f): 5.5Available -
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Airy Disk APO 96mm f/6 ED Apochromatic Refractor
Aperture (mm): 96Focal length (mm): 575Speed ​​(f): 6Available -
Askar 71F flat-field Quadruplet air-spaced APO
Aperture (mm): 71Focal length (mm): 490Speed ​​(f): 6.9Available -
Occasion William Optics ZenithStar 61II goud APO telescoop
Aperture (mm): 61Focal length (mm): 360Speed ​​(f): 5.9Available -
William Optics ZenithStar 61II goud APO telescoop
Aperture (mm): 61Focal length (mm): 360Speed ​​(f): 5.9Ask us for the delivery time -
William Optics ZenithStar 61II grijs APO telescoop
Aperture (mm): 61Focal length (mm): 360Speed ​​(f): 5.9Ask us for the delivery time -
William Optics ZenithStar 61II rood APO telescoop
Aperture (mm): 61Focal length (mm): 360Speed ​​(f): 5.9Available via backorder -
William Optics Zenithstar 81 Goud APO FLAT6AIII Package
Aperture (mm): 81Focal length (mm): 558.9Speed ​​(f): 6.9Available via backorder -
William Optics Zenithstar 81 Rood APO FLAT6AIII Package
Aperture (mm): 81Focal length (mm): 558.9Speed ​​(f): 6.9Available via backorder -
William Optics Zenithstar 81 WIFD
Aperture (mm): 81Focal length (mm): 559Speed ​​(f): 6.9Available -
Offers
ZWO FF107 Quadruplet APO
Aperture (mm): 107Focal length (mm): 749Speed ​​(f): 7Available via backorder -
ZWO FF65 quintuplet APO
Aperture (mm): 65Focal length (mm): 416Speed ​​(f): 6.4Available -
ZWO FF80 Quadruplet APO
Aperture (mm): 80Focal length (mm): 600Speed ​​(f): 7.5Available -
This product has multiple variants. The options may be chosen on the product page
William Optics Guide Star 61 APO telescoop
Aperture (mm): 61Focal length (mm): 360Speed ​​(f): 5.9Delivery time: make your choice -
William Optics ZenithStar 73 APO Goud
Aperture (mm): 73Focal length (mm): 430.7Speed ​​(f): 5.9Available via backorder -
William Optics ZenithStar 73 APO Rood
Aperture (mm): 73Focal length (mm): 430.7Speed ​​(f): 5.9Available via backorder -
TecnoSky ED APO Refractor 70/420 F/6
Aperture (mm): 70Focal length (mm): 420Speed ​​(f): 6Ask us for the delivery time -
William Optics Star 71 APO f/4.9
Aperture (mm): 71Focal length (mm): 347.9Speed ​​(f): 4.9Available via backorder