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ReadMe.txt
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2000-09-11
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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