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WILLIAM OPTICS · 251, Taiwan, New Taipei City, Tamsui District, Section 2, Zhongzheng E Rd, 29-5號30樓

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Eye Relief

Coating

Focal Length

Weight

Total Length

Barrel Size

Apparent Field of View

Series

Lens Type

Filter Thread

Magnification

Field of View

Done

Tube Length

Image Circle

Focuser Travel Length

Diameter

Release Year

Adapter Included

OTA Weight

Camera Format

Optional Flattener

Total Weight

Focal Ratio

Focuser

Interpupillary Distance

Diopter Adjustment

Minimum Focus Distance

Eye relief

Exit pupil 

Waterproof

The distance between the centers of a person’s two pupils, which must match the spacing of binocular eyepieces for comfortable viewing.

The diameter of the light beam leaving the eyepiece, showing how much light enters your eye for a bright image.

Exit Pupil

Focus System

Prism System

Water Proof

The actual portion of the sky you see through the telescope.

How wide the view looks when looking through the eyepiece — a larger angle gives a more immersive experience.

It’s how far back you can hold your eye from the eyepiece and still see the whole image — important for comfort, especially if you wear glasses.

Diopter adjustment allows you to fine-tune focus for differences between your left and right eyes, ensuring a sharp image without glasses.

M8H4-12