## Hack Combines Graphing Calculator and Game Boy Camera to Create a Selfie-Snapping Machine

Christopher Mitchell recently breathed some photographic life into a pice of technology many of us probably have languishing away in some drawer. With the help of an Arduino board, he’s found a way to Frankenstein a Texas Instruments graphing calculator and Game Boy Camera into the ArTICam: a 128–128 grayscale selfie machine.

## This Handy Little Web App Helps You Visualize DOF Across Various Formats and Focal Lengths

When it comes to understanding how depth of field, focal length and other variables are affected by different film/sensor formats, it can get confusing. Fortunately, Reddit user redblue has created an incredibly useful interactive resource that will help you better visualize the factors at play by letting you change variables while swapping sensors sizes and seeing the effect in real time. Read more…

## DIY Hack: Turn a Graphing Calculator into a Homebrew Intervalometer in 5 Minutes

If you’ve taken almost any math classes over the last decade, chances are good you have a graphing calculator sitting around in some drawer somewhere. And while we can’t promise you’ll ever use what you learned in Calculus (an engineer friend of mine used to call it ‘calcuseless’) the folks over at JACP Media can help put that old calculator to use by turning it into a homebrew intervalometer. Read more…

## Kaufmann’s Posographe: An Amazing Exposure Calculator from the 1920s

Kaufmann’s Posographe is an intricate pocket-sized mechanical calculator invented back in the 1920s. Measuring 13x8cm and filled with tiny scribblings, the device allowed photographers to approximate the exposure values they needed by simply sliding around six small pointers.

## Find Out How Influential of a Photo-Sharer You Are with Photorank.me

Photorank.me is a new web app that attempts to calculate how influential you are in the world of online photo sharing. After giving it read-only access to your social media accounts (e.g. Twitter, Facebook, Flickr, etc…) the app computes a numerical score based on reach, activity, and quantity. PetaPixel got a score of 63, and the highest ranked person on the global leaderboard is currently English Purcell Struth, AKA “photoeng” on Instagram.

Photorank.me (via Mashable)

## Online Sensor Size Calculators and Comparison Charts

A camera’s sensor size is a very good predictor of how good its image quality is, but understanding and comparing the sensors sizes isn’t very easy. While televisions and computer monitors are usually measured by diagonal length, sensors sizes are listed with its two dimensions in millimeters. Back in 2008, David Pogue of the New York Times wrote an article about this issue, calling for someone to develop an online tool for converting confusing sensor measurements into the diagonal length of the sensor in inches. Within three hours two new websites were born: Sensor-Size and Sensor Size Calculator.

## Old School Rotary Exposure Calculator

Want to challenge yourself by shooting manually without a light meter? Head on over to eBay and pick up a Johnson “Standard Exposure” Calculator for less than \$10. Released in the late 1940s, it’s a simple rotary device that lets you calculate the proper exposure by choosing the current scene, weather, exposure time, and film speed. Find more about these exposure calculators over on photomemorabilia. You can also check out the Exposure-Mat for a printable card that helps calculate exposure too.

(via swissmiss)

## DOF Calculator Helps You Take Sharp Landscape Photos

DOF Calculator is an app for Android phones that helps you easily calculate depth of field and hyperfocal distances. Simply tell it your camera, lens, and aperture setting, and it’ll spit out the numbers you need for optimally sharp landscape photographs. You can download it for free by searching for “DOF Calculator” in the Android Market.

For a quick video tutorial on how hyperfocal distance works, check out this post.

## Calculate Your Local Golden Hour

The golden hour in photography is the first or last hour of sunlight in a day that photographers often aim to shoot in, since the sun’s position produces a soft and warm light with longer shadows. The Golden Hour Calculator is a useful website that can help you calculate the golden hour(s) for your location, telling you exactly when the sun rises and sets.

Update: Darkness is an app for the iPhone that can help you calculate your golden hours on the go. (thx @noahaboussafy)