When these three elements are combined, they represent a given exposure value (EV) for a given setting. Any change in any one of the three elements will have a measurable and specific impact on how the remaining two elements react to expose the film frame or image sensor and how the image ultimately looks. For example, if you increase the f-stop, you decrease the size of the lens’ diaphragm thus reducing the amount of light hitting the image sensor, but also increasing the DOF (depth of field) in the final image. Reducing the shutter speed affects how motion is captured, in that this can cause the background or subject to become blurry. However, reducing shutter speed (keeping the shutter open longer) also increases the amount of light hitting the image sensor, so everything is brighter. Increasing the ISO, allows for shooting in lower light situations, but you increase the amount of digital noise inherent in the photo. It is impossible to make an independent change in one of the elements and not obtain an opposite effect in how the other elements affect the image, and ultimately change the EV.
If you’re just starting out in photography, do yourself a favor and work through the Photography Basics page over on Exposure Guide. It’s a fantastic resource.
After weeks of leakage on the Internet, the Sony NEX-5R mirrorless camera was finally announced today. As the rumors said, the camera features both Wi-Fi and downloadable apps — two things that look to be huge trends in the camera world this year.
The basic specs for the camera are as follows: it features a 16.1 megapixel APS-C CMOS sensor, a hybrid autofocus that combines phase and contrast detection (a first for the NEX lineup), a max ISO of 25,600, 10 frame per second continuous shooting, 1080/60p HD video recording, and a 3-inch tilting LCD touchscreen. Read more…
Why My Photographs Are Bad is a photography book for beginners first published in 1902 by a man named Charles Maus Taylor. The book contains many of the same basic tips that can be found in introductory books these days, but also many that are very specific to the way photography was done at the time. Here’s a selection of common mistakes that newbie photographers were making over 100 years ago. Read more…
Vimeo has partnered up with Nikon for a new educational video series titled Do More With Your DSLR. The first video is about “working with available light”, and is geared towards beginners who are just starting to figure out how to use their DSLR camera. You can find a more in-depth discussion of the concepts in the video (e.g. exposure, white balance, ISO) in this article.
Here’s an interesting 12-minute video that offers one explanation into how the world of art works. Even if you don’t agree with the philosophy and worldview described in the video, it’s still an eye-opening tour of the different things that influence and power the mysterious world of art.
Back in the spring of 1980, Magnum photographer Bruce Davidson began to photograph the subway system in NYC for his project titled Subway. NYRBlog has published an interesting essay — an excerpt from the introduction of Davidson’s book — in which the photographer talks about his experience:
To prepare myself for the subway, I started a crash diet, a military fitness exercise program, and early every morning I jogged in the park. I knew I would need to train like an athlete to be physically able to carry my heavy camera equipment around in the subway for hours every day. Also, I thought that if anything was going to happen to me down there I wanted to be in good shape, or at least to believe that I was. Each morning I carefully packed my cameras, lenses, strobe light, filters, and accessories in a small, canvas camera bag. In my green safari jacket with its large pockets, I placed my police and subway passes, a few rolls of film, a subway map, a notebook, and a small, white, gold-trimmed wedding album containing pictures of people I’d already photographed in the subway. In my pants pocket I carried quarters for the people in the subway asking for money, change for the phone, and several tokens. I also carried a key case with additional identification and a few dollars tucked inside, a whistle, and a small Swiss Army knife that gave me a little added confidence. I had a clean handkerchief and a few Band-Aids in case I found myself bleeding.
It’s an interesting glimpse into the mind of a photographer who takes his work very seriously.
Here’s a helpful video that attempts to demystify the concept of DSLR sensor sizes. If you’ve never been able to understand how sensor size (and its crop factor) affects resulting photographs, this video will help.
Here’s CNET’s introduction to the new Lytro camera. The square LCD screen on the back of the camera might be small, but it’s a touchscreen display that lets you play around with the focus directly in-camera rather than having to connect the device to a computer.
AllThingsD also has a video showing the camera being demoed at their conference last Thursday.