無料 · 計算と変換
過焦点距離.
過焦点距離と、その距離に合わせたときの近点を計算します。
H = f² / (N × c) + f. The near limit is H/2. Presets are conventional circles of confusion. Local arithmetic only. This is a quantity or geometry estimate, not a code check and not a substitute for a licensed professional.
- Hyperfocal distance
- 10.466667 m
- Near limit at that focus
- 5.233333 m
H = f² / (N × c) + f. Focusing at H keeps acceptable sharpness from about H/2 to infinity for the circle of confusion you selected.
使い方: 過焦点距離
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制限と対応形式
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英語の技術説明
H = f² / (N × c) + f. The near limit is H/2. Presets are conventional circles of confusion. Local arithmetic only. This is a quantity or geometry estimate, not a code check and not a substitute for a licensed professional.
Calculate the hyperfocal distance and the near limit at that focus. H = f² / (N × c) + f. The near limit is H/2. Presets are conventional circles of confusion. Local arithmetic only. This is a quantity or geometry estimate, not a code check and not a substitute for a licensed professional.
50 mm at f/8 with a 0.030 mm circle of confusion.