F O C U S + Version 1.5 Focus+ is a versatile photographic depth of field calculator for the Palm Computing® Connected Organizer. Given the focal length of a lens and desired circle of confusion it can accurately calculate the hyperfocal distance, near/far or front/back depth of field, and optimum focus distance and aperture. The results are tabulated by aperture to aid fast look-up in the field and to see the results in context. Display can be switched between full, half and third stops. Both monochrome and color displays are supported. Focus+ supports all Palm Computing® devices running Palm OS 2.0 (or later). This includes PalmPilot (Personal and Professional), Palm III series (including IIIc), Palm V/Vx, Palm VII/VIIx, Palm m100, Handspring Visor, IBM WorkPad series, TRGpro, Qualcom pdQ, Symbol SPT series and similar devices. The amount of free storage required is 40KB. A small amount of additional storage will be used for the lens database. INSTALLATION To install Focus+, select the FocusPlus.prc file with the Palm Install tool to queue the application for installation on the next HotSync. The application and lens database will be automatically backed up on your computer (as required) on successive HotSyncs. BACKGROUND Irrespective of focal length and aperture, only the plane at the focus distance is truly in focus. Depth of field is the distance range in front and behind the subject considered to be "in focus" or "sharp". It is computed as having a circle of confusion (COC in the software) on the film smaller than some arbitrary diameter. These circles are cross sections of the cone of light coming to a point behind or in front of the film plane. The circle of confusion used is dependent on the degree of enlargement, and hence film format. The hyperfocal distance is the focus distance at which everything from half that distance to infinity will be "in focus". If you're a landscape photographer, this is a very useful value to know. Note that perceived "sharpness" may also be affected by lens aberrations and diffraction at the respective ends of the aperture range. OPERATION Focus+ has three modes: Hyperfocal, Depth of Field and Calculator. Select the desired mode by selecting it from the pop-up list at top right of the display. Also, if you've assigned Focus+ to one of your hardware buttons (with the Prefs application), repeatedly pressing this button will cycle through each mode in turn. Set the mode you want Focus+ to start with by tapping the Menu silk-screened button and selecting Preferences from the Options menu. Before you can use Focus+ you must first define the parameters for your lenses. This is done in the Define Lenses dialog which will be opened automatically when you first use Focus+. (You can add additional lenses or change parameters at a later time by tapping the Menu silk-screened button and selecting Define Lenses from the Record menu.) When you tap the New or Edit button, you'll be asked to specify a name for the lens, its focal length, aperture range and the default circle of confusion to be used in calculations. The lens will be added to the Focus+ database and can be selected from the Lens pop-up in each mode. The number of lenses you can specify is limited only by available storage. Note that the defaults listed in the circle of confusion list are for typical enlargement to an 8" x 10" (20cm x 25cm) print size. As an aid to determining the optimum circle of confusion to be used, select COC Calculator from the Options menu. Focus+ has been designed to be fully self supporting on your device. For a description of each mode, tap the Menu silk-screened button and select Help from the Options menu. For help on dialogs, tap the small i (information) at top right of each dialog. REGISTRATION Focus+ is shareware. You may use this software for a period of up to 14 days from installation for evaluation purposes. If you find the program useful and continue to use it, you are required to register (pay for it). Register online at any of the following: www.bitwareoz.com www.palmgear.com www.handango.com You'll need to provide your device's HotSync/User name when you register. This is the name you chose for your device when the Palm Desktop software was installed. If you've forgotten what this name was, it is displayed in the top right corner of the device display at the completion of a HotSync operation. It is also displayed in the Name field of the Focus+ Registration dialog. On registration, you'll receive a personal license code that will cause the banner to be no longer displayed and enable you to continue using the software after the evaluation period. You'll also get free upgrades and technical support (e-mail only). TECHNICAL SUPPORT Please send any queries, bug reports, and suggestions by e-mail to support@bitwareoz.com. All queries will be answered. Make sure you identify your device type and model, Palm OS version and Focus+ version. KNOWN ISSUES 1. Some third-party application launchers don't cleanup correctly prior to passing control to Focus+ which can cause Focus+ to crash when the banner is dismissed. Contact the author of the launcher for a fix. If you experience problems running Focus+ and have HackMaster or replacement application launchers installed, first disable these to determine the cause of the error. Such hacks and launchers may modify the operating environment of your device. If you find an incompatibility, please report this to the author of the hack/launcher. FLASHPRO COMPATIBILITY If you have FlashPro installed, you can reclaim storage by moving the Focus+ application to flash memory. The lens database (created the first time you use Focus+) must NOT be moved to flash memory. YEAR 2000 COMPLIANCE Focus+ is Year 2000 compliant. The operating date range of this software is January 1, 1904 to December 31, 2031 inclusive. ACKNOWLEDGEMENT I am indebted to Bob Wheeler and his "Notes on View Camera Geometry" for the theory on which this software is based. LICENSE/DISCLAIMER BY USING THIS SOFTWARE, YOU AGREE TO BECOME BOUND BY THE TERMS BELOW, WHICH INCLUDES THE SOFTWARE LICENSE AND DISCLAIMER OF WARRANTY. THIS SOFTWARE IS PROVIDED FOR EVALUATION PURPOSES FOR A PERIOD STRICTLY LIMITED TO FOURTEEN DAYS FROM INITIAL INSTALLATION. AFTER THIS TIME THE SOFTWARE MUST EITHER BE PERMANENTLY REMOVED FROM YOUR DEVICE OR REGISTERED. WHEN REGISTERED, BITWARE AUSTRALIA GIVES YOU A LICENSE TO INSTALL AND CONTINUE TO USE THE SOFTWARE FOR AN UNLIMITED PERIOD SOLELY ON THE DEVICE IDENTIFIED DURING THE REGISTRATION PROCESS. AT ALL TIMES, BITWARE AUSTRALIA RETAINS OWNERSHIP OF THE SOFTWARE. YOU MAY NOT MARKET, RENT, LEASE, LOAN, SELL, NETWORK, DISTRIBUTE OR TRANSFER THIS SOFTWARE AND/OR LICENSE CODES TO OTHERS, EITHER ON THEIR OWN OR WITH OR AS PART OF ANY OTHER PRODUCT OR EQUIPMENT, WITHOUT AN EXPRESS DISTRIBUTION LICENSE FROM BITWARE AUSTRALIA. ADDITIONALLY, YOU MAY NOT DISASSEMBLE, DECOMPILE, REVERSE ENGINEER, MODIFY, TRANSLATE OR CREATE DERIVATIVE WORKS BASED UPON THE SOFTWARE AND/OR DOCUMENTATION OR ANY PART THEREOF WITHOUT PERMISSION. THE SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT ANY WARRANTY, EXPRESSED OR IMPLIED, AS TO NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. THE USER ACCEPTS FULL RESPONSIBILITY FOR ANY DAMAGE, CONSEQUENTIAL OR OTHERWISE, RESULTING FROM ITS USE. ALL FILES IN THIS PACKAGE ARE COPYRIGHT MATERIALS OF BITWARE AUSTRALIA. TRADEMARKS Palm Computing is a registered trademark of Palm, Inc., or its subsidiaries. All other trademarks and service marks are the property of their respective owners. CONTACT Stephen Best Bitware Australia Pty. Ltd. info@bitwareoz.com www.bitwareoz.com