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HOWTO: Calibrating the distance of the A620. Richard Lemieux, 2007-05-24 The purpose of distance calibration is to get correct distance numbers from the camera software.

HOWTO: Calibrating the distance of the A620

The intent is to be able to compute distance related numbers such as the depth of field and the optimal stereo separation distance. The process of calibration returns parameter values that are used in a program that displays distance related numbers such as program rf_3.c [2]. The A620 already provides a distance number. The distance number provided by Canon is used in the 'distance scale' shown in manual focus mode and while doing 'autofocus lock' (shutter half-press and down arrow). FAQ. Firmware versions in green are available in stable and/or dev for download Firmware versions in gray do not have official CHDK releases.


Check porting status here For the development status of not-yet-supported cameras, see For Developers. ACID. This is the English version of the ACID Download Page.


There's a German version here and a Spanish version here. If you are interested in making other translated versions of ACID available, please see the ACID Internationalisation page. ACID will download an SDM or CHDK build, but will not install it. To download and install a build, use my ASSIST app (for SDM) or STICK app (for CHDK).

Both run under Mac OSX, Windows and Ubuntu Linux. Acid is a Java application designed to simplify the process of getting an SDM, CHDK (stable or trunk) or CHDK-DE build for your Canon camera. Take a picture with the camera put the camera card into a card reader run Acid and drag the photo from the card and drop it onto the Acid window. Pocket-Sized CHDK USB Camera Shutter Remote. This Instructable shows you how to make a pocket-sized CHDK USB remote for your Canon camera inside of an Altoids Smalls tin (the new kind with the hinged lid).

Pocket-Sized CHDK USB Camera Shutter Remote

I kept it pretty simple as far as the circuit goes. It's just batteries connected to a NO push button switch and a jack into which a modified USB cable is inserted. Try it out. Samples: High-Speed Shutter & Flash-Sync. Sample images of what can now be done with the ultra-high shutter speeds with high-speed flash sync.

Samples: High-Speed Shutter & Flash-Sync

These images were taken with the new high-speed shutter override option. 1/10,000 second, Manual mode, f/3.5, flash manual at lowest output, +4 diopter close-up lens, subject distance approx. 10 inches (25cm), room lights and lights above sink all turned on. Samples: Unlimited DOF. You can use focus bracketing to increase the DOF (depth of field) of a photo.

Samples: Unlimited DOF

This is especially useful for macros, because often the DOF is so shallow that large parts of the picture will be blurred. Just load your pictures into CombineZM (freeware), click "Macro>Do Stack" and they will be combined into one photo with large depth of field. The following photos were combined into one image with a large DOF. Benchmarks. Here are some benchmark results for various SD card brands which were acquired with the new benchmark option of the CHDK.


Maybe also see BenchmarkVideo60Sec. MbineZM News. CombineZP the next member of the CombineZ series of programs is now available.

mbineZM News

Having trouble Downloading from here? There are copies of most files on the CombineZ Yahoo Group web site, try downloading from there. Please Note There are now Two versions of CombineZM. 1. the FULL version still called CombineZM, short form CZM. 2. the SMALL version called CombineZ-m, short form CZm. CombineZM. DOF stacking was not set properly, and/or too many/too few photos.What were your parameters in the focus settings, and how many shots did you combine?


What I do with such macros is set the focus depth increment to 2mm, set it to "+" bracketing, set into continuous mode, set the focus lock at the closest I can, set EV lock, and fire away.I take many dozens of shots on the tripod.When I load them all, I clear out the ones at the beginning of the string of shots (usually none need to go) and any shots after the last good focused part of the object.From there, I may be left still with 3 dozen shots. I then delete the last two photos in every three shots.In other words, pictures numbered xx25, xx26, xx27, xx28, xx29, xx30, xx31, xx32, xx33, xx34, xx35, xx36, xx37,xx38,xx39,xx40... CheatSheets. A640 for HDR Bracketing Edit I've made this cheat sheet to help me remember all the ALT-shortcuts on the A640, and to teach my wife how to take HDR exposure-bracketed sequences.


Hope that one or the other might find it as useful as I do. Feel free to modify it to your needs. Some of the text is camera and/or script file dependent. FAQ. FAQ/Mac. A guide to installing and using CHDK with your Mac. Manual vs. Auto booting Edit. CameraFeatures. Since the discovery of many new override features, some far surpassing what the cameras were originally sold to do, it has been found that each make and model of camera may have variations in the absolute limits of Shutter-Speeds, F-Stops, ISO-Values, Motion-Detection Speed, among others.

CHDK for Dummies. The Very First Steps Choosing a new camera Edit There are two segments in the digital camera market: people who just want to snap pictures, and professional photographers. Accordingly, many camera manufacturers have two "families" of product: Point And Shoot cameras (also called Digital Compact cameras) intended for consumers who want to take snaps. The CHDK (Canon Hacker Development Kit) software makes the extra settings of a DSLR available on Canon's point-and-shoot cameras. Using CHDK Edit Please note these points on using CHDK to get more out of your digital camera . CHDK only works with Canon point-and-shoot digital cameras. Modern digital cameras contain tiny computers. The next section describes how to check which firmware version your camera has. Review the officialCHDK camera list to see if there is a version of CHDK for your camera model and firmware version.

CHDK firmware usage. Introduction Edit What is CHDK? Canon Hack Development Kit CHDK is a unique software application developed by enthusiasts that enables extra features for ported Canon™ "Point&Shoot" cameras. (Note: it will not run on DSLR cameras). UBASIC/Scripts. UBASIC/Scripts: Focus Bracketing. DoF Stacking. Scripts. CHDK allows you to automate your camera by running "scripts", small and simple programs written by end-users and executed on the camera. UBASIC/Scripts: Universal motion detection. Gentles Limited: Camera Remote Control. The Gentled CHDK2. The Gentled CHDK2 lets you connect two servo channels to the USB port of a CHDK-enabled Canon camera. Sujit Shet. Wireless Remote Shutter for Canon/CHDK. Building usb-remote-cable. USB Splitter. USB Remote Cable. Using just an inexpensive push button switch, a converted USB cable, and a small battery, you can construct a remote device that will allow you to control the operation of your CHDK-enabled camera.

If you want software control over USB, see PTP Extension Background. CHDK in Brief.