二手定焦鏡

Canon EF 35mm f/2 IS USM is a compact full-frame EF prime lens with f/2 maximum aperture, 4-stop image stabilization, and ring-type ultrasonic autofocus.

• Minimum focus distance: 0.24 m
• Filter size: 67 mm
• Weight: 335 g

On APS-C bodies, the field of view is roughly like a 56mm lens, so it behaves more like a normal prime.

搭配 Canon EOS 1500D，這是非常實用的日常街拍與低光人像鏡頭組合。

等效焦距 50mm 的特點可以說是攝影界的「萬用標準鏡」，它的視角接近人眼自然視角。

若要形容 50mm 鏡頭的魅力，那就是「接近眼睛所看到的遠近感」。由於被攝體與背景的距離不會被強調出來，因此很接近眼睛所看到的情形。若在1-3米的距離拍攝，畫面會很自然。此外，若在1米以內的距離拍攝的話，會拍出有如望遠鏡頭的效果；若遠離被攝體拍攝的話，會拍出有如廣角鏡頭般的效果，是一款魔法鏡頭。

上田晃司《全圖解 馬上提昇功力的57個攝影妙方：一目了然的專業級表現手法！》

Hyperfocal Distance Setup (Canon EOS 1500D, APS-C):

Manual focus + aperture selection → Align infinity mark with aperture mark on the depth-of-field scale.

Resulting zone → From the nearest marked distance to infinity remains acceptably sharp.

APS-C factor → Hyperfocal distance uses APS-C circle-of-confusion, not full-frame.

Canon guidance → Lens distance scale is the simplest way to set hyperfocal distance; manual focus ensures accuracy.

Accuracy check → The scale is approximate; confirm with test shots and magnified review.

Practical tip → For landscapes, f/8 or f/11 is easier to manage than wide apertures with shallow depth of field.

Aperture	Hyperfocal distance	Approx. focus range
f/4	15 m	7.5 m to infinity
f/5.6	11 m	5.5 m to infinity
f/8	7.7 m	3.9 m to infinity
f/11	5.6 m	2.8 m to infinity

https://cdn.prod.website-files.com/5ecffb01299df43b575f4516/5f78ddac9f88ca5b68dc8a0e_Double-the-distance-method.png

超焦距指相機對焦於那個距離時，能把可接受的清晰範圍最大化，使其由該距離的一半延伸至無限遠。它常被應用於風景拍攝，因多數風景照都需要較闊的清晰範圍。利用超焦距的物理特性， 攝影師便可獲得最大的景深。

www.imagejoy.com/article/675

Hyperfocal Distance via Lens Scales:

Focus index → Fixed central line; distance and aperture markings move against it.

Distance + DOF scales → Lens window shows distance scale; DOF scale has aperture marks (e.g., f/11, f/22).

Infinity alignment → Align infinity mark with one side of the DOF scale; the opposite mark shows the near limit of sharp focus.

Example setup → At f/11, aligning infinity with the f/11 mark lets the focus index show the near distance, creating a hyperfocal zone (near distance → infinity).

Special note → The red dot is for infrared focusing, not for normal hyperfocal distance use.

The reason you see two f/11 marks and two f/22 marks on the depth‑of‑field (DOF) scale is because they represent both sides of the focus zone:

• Focus index (center line) → This is the actual point of focus.
• Two aperture marks (e.g., f/11, f/22) → One mark sits to the left of the focus index, the other to the right.
• The left mark shows the near limit of acceptable sharpness.
• The right mark shows the far limit (often infinity).

Example: f/11 setup

• Align infinity with the right f/11 mark.
• The left f/11 mark then points to the nearest distance that will still be sharp.
• Result → Everything between that near distance and infinity is within the DOF zone (your hyperfocal setup).

Why two marks?

Because depth of field extends in both directions from the focus point — closer and farther. The paired marks let you read both boundaries at once.

Think of it like a ruler: the aperture marks are the “edges” of the sharp zone, and the focus index is the “center.”

www.perplexity.ai

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