William Optics 243-308 mm Bahtinov Focus Mask

Name: William Optics 243-308 mm Bahtinov Focus Mask | Telescoop.nl
Brand: William Optics
SKU: 62746
Price: 149.00 EUR
Availability: InStock

149,00

William Optics 243-308mm comes as a high-quality focus mask made of optical acrylic glass with a light transmittance of 92%, providing an approx. three times brighter diffraction image than classic metal masks.

Focusing without fuss

The William Optics 243-308mm focus mask helps you focus quickly and precisely. It is made of optical acrylic glass with 92% light transmission. This keeps your image clear and sharp even with faint stars.

William Optics 243-308mm Bahtinov focus mask made of transparent acrylic glass

Clear bending pattern

The mask has a pattern that bends three times stronger than classic metal masks. You can see the lines clearly and find the perfect focus faster.

Easy to use

The mask fits telescopes from 243 to 308 mm in diameter. You simply place it over your telescope and you are ready to focus. The acrylic glass provides a clear, high-contrast image.

William Optics 243-308mm comparison of the bright diffraction pattern with a standard mask

Specifications

General

Feature	Description
Color	Transparent
Material	Acrylic
Diameter (mm)	243-308
Type	Mask
Design	Focus Mask

Additional information

Use Type	Astronomy
Observation goals	Astrophotography
Lens diameter (mm)	≥56 mm
Suitable for f-ratio	Universal
Weight	Lightweight (0 - 5 kg)
Aperture	200+ mm
Weight class	< 400 g

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