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Telescopes > William Optics > William Optics Apochromatic refractor AP 98/618 FluoroStar FLT98 ED DDG
Product no.: 18941

Apochromatic refractor AP 98/618 FluoroStar FLT98 ED DDG

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Product description

William Optics FLT FluoroStar telescope:

The telescope is equipped with a triplet apochromatic objective lens. A fluorite glass element is used to provide the highest possible colour correction, right out to the edge of the field of view. The difference can be clearly seen and not only with very critical objects but above all with photographic work using digital camera systems. The air gap lens elements are held rigidly in the lens cell and have very high quality 'STM' coatings for an even better contrast. The OTA interior is also well equipped with baffles and is painted matt black so that virtually no irritating reflections can occur.

This telescope can also be used together with an image field corrector as an excellent astronomical objective. 6 light baffles ensure excellent reflection suppression and so higher contrast.

Specifications

Optics


Type
Refractor
Aperture (mm)
98
Focal length (mm)
618
Aperture ratio (f/)
6,3
Resolving capacity
1,17
Limit value (mag)
11,8
Light gathering capacity
200
Max. useful magnification
196

Focuser


Type of build
DDG
Connection ( to eyepiece)
3,5
Rotating
yes
Gear reduction
1:10 fine focusing

Area of application


Nature Observation
yes
Moon & Planets
yes
Nebulae & galaxies
yes
Astrophotography
yes
Sun
not recommended (Only with appropriate Sun filter)

Recommended for


Beginners
not recommended
Advanced
yes

Product safety

Manufacturer: William Optics Co. Ltd, TW, [email protected]
Responsible person: NIMAX GmbH, Otto-Lilienthal-Str. 9, 86899 Landsberg am Lech, DE, [email protected]

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