Focus Test Chart 對焦測試板

samwong · 發表於 2006-11-27 02:49:02

本帖最後由梨於 2012-10-19 01:41 PM 編輯

All rights reserved. Free for download and private usage. Transferring this page without the designer's further written notice is prohibited.

聲明：本對焦測試板乃筆者創作，筆者擁有此測試板的版權，歡迎各界下載取用，禁止未經筆者書面同意前轉載。

History: Most of Digital SLR new comers like to check their auto focus lenses work fine or not. They take pictures to a ruler or to an A4 chart at 45 degree. It may get a wrong result since objects are not parallel to the AF sensor. The composer, a moderator of DCHome.net, introduces a simple DIY focus test chart to photographer friends for better result. Please feel free to leave a message within this discussing topic or send a mail to the composer at oldpear@gmail.com, thank you.
前言：數碼單反興起，突然多了鏡頭跑焦事件，網上流傳一種以45度拍攝直尺以測試對焦準確程度的測試圖，非平行和垂直的方法測試可能有極嚴重誤差，有見及此，為滿足網友需要，筆者經多次試製，終於在兩年前完成這個比較精確的測試器，並且得到網友讚許，由於本伺服器曾發生故障以致檔案消失，重新張貼並應網友要求，加入製作和使用方法，希望可為您解決失焦的疑惑，這個測試器的總下載次數已超過40000次，如有意見或提問，歡迎在本帖內留言或直接向筆者提出，謝謝！

You have to pay 30 DCHome credits for downloading.
下載該文件需繳付30 DCHome積分

FocusTestV11.pdf (142.97 KB, 下載次數: 3407, 售價: 30 威望)

2012-10-19 01:41 PM 上傳

點擊文件名下載附件

Method 1: Simply module
方法一：簡單模式

(1) Download the attached FocusTestV11.pdf at the bottom of this page. Print it out at highest resolution onto A4 papers. 140 gsm paper is recommended.
(1) 下載本帖內的 FocusTestV11.pdf 檔案，用A4白紙以最高解釋度打印出來，若用140 gram/meter 的厚紙更佳。

(2) Only first page is needed in simply module as shown.
(2) 簡單模式只需印出第一頁就夠了，如圖示：

(3) For folding parts, first use an awl or other pointed tool to make a light crease along the dotted line. This will make the folds straight. Avoid making strong creases, as this will cause the paper to tear.
(3) 以針筆沿直尺跟著預設的折線輕劃，測試器折起來便很挺直了。

(4) Side view of a finished module, make sure the three focus wings at a straight line.
(4) 這是側看完成圖，留意三個對焦點從側看起來必須成一直線。

Method 2: Accuracy module
方法二：精確模式

(1) Three kinds of focusing bar are included. Select one set you like, only three parts are needed as shown.
(1) 請選擇您喜歡的測試棒，所需的三件組件如圖示，並切去中空部份。

(2) For folding parts, first use an awl or other pointed tool to make a light crease along the dotted line. This will make the folds straight. Avoid making strong creases, as this will cause the paper to tear.
(2) 以針筆沿直尺跟著預設的折線輕劃，三件組件均需在折線上劃一次。

(3) Fold the focusing bars as shown, no adhesive needed.
(3) 依折線將對焦棒折曲，不需黏合。

(4) Attach the long focusing bar to the walls of scale stand, some aligning lines imprinted on it to help you fit it at right position.
(4) 先將長對焦棒橫穿對焦座，並依預印的虛線定位。

(5) Attach the short focusing bar as shown. This is a rear view of a finished module. So simply, isn't it?
(5) 將垂直對焦棒插入，這是測試器的後視圖。

How to use: Mount your DSLR on a tripod and let the height of lens as same as the Focus Test Module does. Two cutting triangle on the top of short focusing bar help you to calibrate the module stand facing parallel to the focal plane. You can focus to anyone of five or six focusing points imprinted on two bars without moving the tripod. Zero appears sharpest if AF is working fine.

使用方法：　務必使鏡頭高度和測試器相同，垂直測試棒上方有準星幫助判斷測試器是否跟感光平面平行，為免人為誤差，請用三腳架固定相機，不需移動腳架便可使用相機的任何對焦點向測試棒的任何圖案對焦，對焦座的斜面刻度是投影尺寸，準焦是0刻度最銳，若跑焦可從測試相片中可直接讀出跑焦的實際距離。

[ 本帖最後由梨於 2009-9-27 02:52 AM 編輯 ]