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Astrofotografía > Accesorios para la fotografía > Aplanadoras, Correctores, Reductores > Artesky > Artesky 0.85x Full Frame Newton Coma Corrector
Nº de producto: 70074

0.85x Full Frame Newton Coma Corrector

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Descripción del producto

The coma corrector is a very important accessory for all NEWTON telescopes with an aperture ratio between f/3.5 and f/6 , especially for photographic use.

With this corrector you can also correct the field on cameras with large sensors up to full format ("FULL FRAME") .

On the inside (camera side) there is a 2" filter thread , e.g. for using a narrow band filter or a light pollution filter.

The Artesky coma corrector also reduces the focal length of your Newtonian telescope:

For example, a Newtonian with a native focal length of f/4 is reduced to a resulting focal length of f/3.4. This shortens the exposure times considerably and also results in a fully illuminated field of view - ideal for recordings with full-frame DSLR cameras!

Compatible for Newtonians between 150mm and 300mm aperture with a focal ratio between f/3.5 and f/6.

Factor: 0.85x

Field: Full Frame

Optical elements: 4 optical elements with multi-coating

Outer Diameter: 76.3mm (3")

Back focus: 55mm

Total length of the corrector: 119.81mm

Weight: 0.89kg

What is coma and what causes it?

Coma is an optical aberration that derives its name from the classic comet-like appearance (coma = tail of a comet).

The coma occurs when the imaged object (eg a star) is moved laterally by a certain angle with respect to the axis of the system. The rays passing in the periphery of the optical axis are focused at a different point on the axis. This gives the star a "tail" and makes it look like a small hook. This effect occurs mainly on fast Newtonian telescopes in the peripheral area of the field of view. A ray of light passing through the lens at a certain distance from the center is focused in a ring on the focal plane. The overlapping of these different rings creates a V-shape similar to the tail ("coma") of a comet.

As with spherical aberration in refractors, coma can be reduced or even completely eliminated by using suitable coma correctors for the affected optical system.

Especificaciones

Capacidad


Conexión (lado de telescopio)
3"
Abertura libre (mm)
98
Idóneo para telesopios
f/3.5 bis f/6 (Newton)
Backfocus (mm)
55
Conexión (lado de ocular)
2"
Conexión (lado de cámara)
M54

En general


Tipo
Aplanadoras, Correctores, Reductores
Tipo de construcción
Corrector de coma
Peso (g)
90
Longitud (mm)
119,8

Aplicaciones


Apto para fines fotográficos
Artesky 0.85x Full Frame Newton Coma Corrector
Artesky 0.85x Full Frame Newton Coma Corrector
Artesky 0.85x Full Frame Newton Coma Corrector
Artesky 0.85x Full Frame Newton Coma Corrector

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