視し差さ

noun, noun which may take the genitive case particle 'no'

parallax

Technical term in astronomy, optics, and surveying for the apparent shift of an object's position when viewed from different angles.

• 視し差さを利り用ようして星ほしまでの距きょ離りを測そく定ていする。

  The distance to the star is measured using parallax.

• カメラのファインダーには視し差さがあるため、構こう図ずに注ちゅう意いが必ひつ要ようだ。

  Because of parallax in the camera viewfinder, you need to be careful with the composition.