Ever wonder how much you’re paying to keep your rechargeable camera batteries juiced? The answer: probably around a buck or two a year. Researcher Baskar Vairmohan of EPRI conducted a study to determine the effect of popular gadgets on our nation’s power grid, calculating the annual electricity costs of various devices. He found that an iPhone uses $0.25, an iPad uses $1.36, a 60-watt light bulb uses $1.61, a laptop uses $8.31, a desktop uses $28.21, and a fridge uses $65.72. Camera batteries probably fall somewhere between an iPhone and a light bulb, meaning they’d cost less than a Starbucks coffee to power for a year — though you still need to pay for the (often pricey) batteries themselves.
(via EPRI via Boing Boing)
Image credit: Camera battery charger by sparkieblues
Photographer Jeff Cable purchased a couple Canon 5D Mark IIIs recently and discovered that although the camera offers both SD and CF card slots, you should avoid the SD slot if you want maximum shooting speed. He writes,
[…] for some reason unbeknownst to me, Canon decided to build the 5D Mark III with one very fast CF slot which supports the newer UDMA7 protocol and a standard SD card slot which does NOT support the high speed standard […] Without UHS [Ultra High Speed] support, the top speed that can be achieved by the SD card is 133x. This is true even if you purchase a 600x SD card and insert it in the camera. The best you will get is 133x
It turns out that the camera will default to the slowest card inserted. So, if you have a 1000x CF card in slot one and any SD card in the second slot, the very best buffer clear that will achieve is 133x.
It might not be a big deal for most photographers, but if your line of work requires clearing the camera’s buffer as quickly as possible, it something you might want to be aware of.
Why you should not put an SD card in your Canon 5D Mark III (via Photography Bay)
Image credit: Photograph by Jeff Cable
Did you know that more photos are created every two minutes than in the entire 1800s? HighTable created this infographic that gives a quick overview of the state of the photography industry and the rise of mobile photography.
Ever wonder what the f-number of your eyes are? It can easily be calculated using the human eye’s focal length (~22mm) and physical aperture size. Here’s what Wikipedia has to say:
Computing the f-number of the human eye involves computing the physical aperture and focal length of the eye. The pupil can be as large as 6–7 mm wide open, which translates into the maximum physical aperture.
The f-number of the human eye varies from about f/8.3 in a very brightly lit place to about f/2.1 in the dark. The presented maximum f-number has been questioned, as it seems to only match the focal length that assumes outgoing light rays. According to the incoming rays of light (what we actually see), the focal length of the eye is a bit longer, resulting in minimum f-number of f/3.2.
The article also notes that the eye cannot be considered an ordinary air-filled camera since it’s filled with light refracting liquid.
F-number: Human Eye (via Reddit)
Image credit: eye 172/365 by attila acs
Stephen Shankland over at CNET has written an interesting behind-the-scenes look at how DxO Labs — one of the world’s premier camera testing services — evaluates equipment. DxO Labs is based near Paris, France and was the result of a 2003 spinoff from a company called Vision IQ, which specialized in swimming pool safety. Since then, the group has published over 185 in-depth camera reviews on its website DxOMark.
KEH has published a helpful primer on memory cards that describes the different types, common error codes you might come across when using them, and how to take care of them:
Memory cards are quite sturdy and commonly expected to work through one million read/write/erase cycles. The weakest part of the card is the connectors however, and should withstand around 10,000 insertions/removals into a camera or card reader.
No matter which type of card (CF I&II, SD, XD, SM, MS, etc.) your camera takes, it’s a good idea to format it on a regular basis. While it may not happen often, these little cards of information can fail and reach the end of their life unexpectedly. To keep your card in good health, format it in the camera from time to time. (I format my card after every major download). This clears up the card and erases all of the data. Of course make sure that you have downloaded and saved onto a computer all of the files on the card before formatting.
Since the number of insert/remove cycles a card can handle is far less than the number of read/write cycles, it’s very important to handle your cards gently in order to prolong their lifespan.
Memory Cards: Compatibility, Error Codes, and Health (via Photojojo)
P.S. Last month Canon also published a helpful guide on its cameras error codes and what they mean.
Image credit: 4GB Memory card by Jorge Quinteros
This photo shows what 5MB of hard drive storage looked like in 1956. The IBM 305 RAMAC hard disk was state of the art, weighed just shy of a ton, required a forklift to be carried around, and was composed of 50 separate 24-inch discs that occupied 16 square feet. The annual cost of using it was a staggering $35,000 — steep even in today’s money. Nowadays most RAW photos outweigh the storage capabilities of that behemoth of an external hard drive…
(via Engadget via TexomaTube)
Did you know that in vintage tintype photographs of infants mothers were often present in the photo but hidden by a veil? Subjects needed to remain still due to the longer exposure times required back then, so mothers were often asked to hold their children tightly while the portraits were being exposed. It was common practice back then, but the resulting photos are pretty eerie when you look at them now.
Ever wonder what National Geographic photographers go through to get the beautiful shots that appear in the yellow-bordered magazine? The Photo Society — an interesting new website created by the magazine’s Photographer’s Advisory Board — recently surveyed 45 Nat Geo photographers about hazards they’ve encountered while on assignment. All the incidences were then counted up and turned into a fascinating table showing how “glamorous” the photographers’ lives are. You can also read short vignettes of these experiences here.
The Hazards of a National Geographic Photographer… [The Photo Society]
Thanks for sending in the tip, Brian!
With the introduction of iOS 5, Apple finally turned the iPhone’s volume up button into a shutter button and its headphones into remote shutter releases. However, did you know that many Bluetooth headsets can now be used as wireless shutter releases? As long as your device can wirelessly increase the iPhone’s volume (and not just its own) it should work. This means that even Bluetooth keyboards can be used as wireless remotes!
(via Macworld via Lifehacker)
Image credit: jawbone + iPhone by camflan