Unfortunately, what with major changes at the helm and making sure that we hit 2014 running, we weren’t able to make it to Vegas for CES this year. And I say unfortunately because, not only does it mean we’ll have to wait a minute to get hands on with some of the new releases, but it also meant missing cool demonstrations like the ones you see above.
Posts Tagged ‘aperture’
Want to capture images of a scene that’s lit purely with candlelight? You can now rent a pair of Zeiss f/0.7 lenses — two of the largest aperture lenses ever seen in the history of photography.
Sigma has been on a tear as of late. Since late 2012, the company has put out a highly regarded 35mm f/1.4 lens, a novel USB dock that lets you calibrate lenses at home, and a revolutionary 18-35mm lens with a constant f/1.8 aperture (shown above).
It appears Sigma is only just getting warmed up: new rumors suggest that Sigma may be building a 24-70mm zoom lens for full frame cameras that boasts a constant f/2.0 aperture.
Sigma shook up the camera world back in April by announcing its new 18-35mm f/1.8 DC HSM lens — the world’s first zoom lens with a fixed maximum aperture of f/1.8. It turns out the revolutionary lens will have a revolutionary price tag as well: the company announced today that the lens will cost just $799.
Entekaphobia is fear of the number 11. I’m a resolution fanatic. I test every new lens for resolution. For personal use, I’ll choose the lens with higher resolution over the one with creamy bokeh every time. When choosing a camera, I have a (yes, I’m ashamed to admit it, but it’s true) strong tendency to want the most megapixels. I’m a resoholic.
Being a resoholic, I’ve always been somewhat fanatical about apertures. Whenever possible I shoot with the lens stopped down at least one stop to wring the maximum sharpness out of my lens. But I’m always careful not to stop down too far because I was taught, soon after I picked up a camera, that if you stopped down too far the dreaded diffraction softening would kick in.
A little earlier today, we reported on how Sohail Mamdani of BorrowLenses had discovered that one particular Nikon D600 he was testing was consistently overexposing photographs by two stops. After searching long and hard for the cause, he stumbled upon the culprit: the D600 wasn’t closing the aperture blades to the correct opening size.
Check out this awesome exposure triangle graphic found in this Exposure Guide tutorial on the fundamentals of exposure:
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.
Exposure – ISO, Aperture and Shutter Speed Explained [Exposure Guide via Reddit]
Photographer Casey McCallister reverse engineered Instagram’s filters, turning them into actions and presets for Photoshop, Aperture, and Lightroom that allow you to retro-fy your photos with one click. The download packs include all 17 Instagram filters and are “latte-priced” at $5.