Matthew Bognar Apps

Flash Assistant helps you determine the correctflash-to-subjectdistance, aperture, ISO, or flash power when usinga manual flashunit. Flash Assistant is simple to use. For example,to determinethe proper flash-to-subject distance for a given ISO,power, andaperture, simply select the distance radio-button anddial-in thedesired ISO, power, and aperture. The correct distance(to thenearest foot) will be displayed in the distance column.FlashAssistant can compute ISO, power, and aperture similarly.You need to know the guide number (GN) of your flash unit(ameasure of light output). Just visit http://dpanswers.com/roztr/flash_finder.phptolook up the GN of your flash.The user interface is very simple and effective making it easytouse in the field.Keywords: Flash, Exposure, Guide Number, ISO,Aperture,Distance

Focus Assistant Pro calculates the depthoffield and hyperfocal distance for photography. It also computestheminimum and maximum distances at which objects will beinacceptable focus.The user interface is friendly, efficient, simple,andattractive. A "scroll wheel" design was chosen for its ease ofuseand flexibility.Advanced users: you can easily change the "circle ofconfusion"to suit any special preferences/needs you may have.

Approximate exposure for various B&W films (and some colorfilms) in low light.

Compute probabilities, percentiles, and plot various probabilitydistributions.