Archive of ‘Technology’ category

Air Force Memorial – Early Morning Photos

Air Force Memorial - single exposure - ©TimeLine Media

With announcements that the cherry blossoms are very close to peak bloom, I am anxious to go out to the Tidal Basin in downtown DC to make some springtime photos! Until I get out there, I am looking back on other recent photo walks around town. The images on this post was from a particularly COLD morning at the Air Force Memorial in Arlington, Virginia. I remember how numb my hands and face was after this shoot even though I was bundled up! At least one advantage is the cold keeps the crowds away, so I was mostly alone at the Memorial except for a group of school kids that quickly took some photos, then hurried back to their waiting motor coach.

Arlington, Virginia

From this high overlook, you have a panoramic view of the Pentagon, and Washington, DC below. This also brings the high winds which makes trying to keep the camera steady difficult. A tripod was definitely necessary this morning, and it allowed me to slow down and really position the camera right where it needed to be for these photos. With the tripod steadying the gear, I also took multiple varying exposure for making high dynamic range photos. Here is a comparison of a single exposure with the metered settings, and an HDR image of 7 combined images, 1 stop apart.

Air Force Memorial HDR - ©TimeLine Media
Air Force Memorial HDR – ©TimeLine Media
Air Force Memorial - single exposure - ©TimeLine Media
Air Force Memorial – single exposure – ©TimeLine Media

The edited single exposure is preferable to me. The dark part of the sky ends up in a different area in the HDR image, and I find it more pleasing in the single image. With HDR images, they bring out more of the shadow areas which did not come out as well in the HDR as a default. I could edit this more in Photoshop, but the single image was pleasing as it is, so I have decide to just keep that version instead of investing more time in the HDR file.

Air Force Memorial with sunburst - ©TimeLine Media
Air Force Memorial with sunburst – ©TimeLine Media

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Photo Proofing – Tech Thursday

Standard Ballroom Dance - ©TimeLine Media

Still have thousands of photos waiting to go on the website! I am still working late in to the night and getting up early to get as much time to go through the photos. My email is mostly on hold, and I only check in to social networks sparingly to link to new blog posts from here. This is all because I want to get these photos onto the proofing site as soon as possible. Why does it take so long? The reason is I want the images to look as good as they can before they are released for viewing.

Baltimore Dancesport Challenge

Showcase Dance - ©TimeLine Media
Showcase Dance – ©TimeLine Media

Images that are out of focus and immediately deleted. For ballroom dance and other events, any photos where the hands or other objects are obscuring the main subject are also removed. All of our cameras are set to shoot RAW files. This is a less-refined version of the JPG files that are more common. Shooting in RAW allows us to recover more detail from photos where the flashes did not pop, or to adjust the exposure in post.

Standard Ballroom Dance - ©TimeLine Media
Standard Ballroom Dance – ©TimeLine Media

In setting up the lights for competitive heats, we keep the flashes behind the photographers so they will light the faces of dancers as they pass in front. With ballroom dance floors being very large, there is a gradation of how far the flash will go. If dancers are closer to the photographers, they will be brighter than dancers that are farther away. Shooting in RAW means that there is a lot more data in each file that can be recovered. So to compensate for these differences, I can adjust the Exposure, Highlights or Shadow sliders in Adobe Lightroom to make the photos look similar to each other.

USA Dance Mid-Atlantic Championships

Latin Dance - ©TimeLine Media
Latin Dance – ©TimeLine Media

With the change in the amount of flash, there can also be changes in the color temperature of the photos. We set the cameras to be balanced to the color of the flashes. However if they do not fire, the photos take a very warm, yellow/orange color. This can also be easily adjusted with the White Balance slider. You do not have as much leeway when using JPG files. So again, the RAW files are necessary for this kind of shoot. It does take lot of space on the hard drives, and it takes a lot of time to make the corrections, but I think it’s worth it!

Smooth Ballroom Dance - ©TimeLine Media
Smooth Ballroom Dance – ©TimeLine Media

TimeLine Media – www.timelinedc.com
703-864-8208

Flash Sync Speed – Tech Thursday

Outdoor photo with leaf shutter lens - ©TimeLine Media

The last two Tech Thursdays I have posted about the leaf shutter lens built into the FujiFilm X100s, Sony Cybershot DSC-RX1, and some medium format camera systems. They have some special abilities over dSLR cameras when it comes to syncing with flash units. Allowing for a faster sync speed, you create outdoor photos in bright sun while retaining shallow depth of field.

Outdoor photo with leaf shutter lens - ©TimeLine Media
Outdoor photo with leaf shutter lens – ©TimeLine Media

Most hobbyists and professionals use dSLRs for making images. However, they are limited in terms of what shutter speed they can use with flash. Look through the manual that came with your camera to see what the sync speed is with your particular model. Some cameras sync at 1/160th of a second, but the fastest shutter speed I have seen with them is 1/200th of a second.

Feature Comparison

If we were to take outdoor photos as these shutter speeds, we would have to close down the aperture to not let in too much light and overexpose the photo. What would happen if you were to set your camera to a higher shutter speed? These were taken with a Nikon D4, and the flash was a moonlight connected by a PC-Sync cable to the camera. This photo is set at f/5.0 at 1/200th of a second, the flash sync speed of the camera:

Nikon D4 - 1/200th second flash sync speed - ©TimeLine Media
Nikon D4 – 1/200th second flash sync speed – ©TimeLine Media

This at f/5.0 at 1/320th of a second:

Nikon D4 - 1/320th second - ©TimeLine Media
Nikon D4 – 1/320th second – ©TimeLine Media

This at f/5.0 1/500th of a second:

Nikon D4 - 1/500th second - ©TimeLine Media
Nikon D4 – 1/500th second – ©TimeLine Media

The shutter is not open long enough for the flash to cover the entire frame. Eventually the entire frame will be black when the shutter speed is too high like at 1/1000th of a second:

Nikon D4 - 1/1000th second - ©TimeLine Media
Nikon D4 – 1/1000th second – ©TimeLine Media

The leaf shutter camera can still do just fine set at f/5.6 at 1/1000th of a second:

Fuji X100s - 1/1000th second - ©TimeLine Media
Fuji X100s – 1/1000th second – ©TimeLine Media

TimeLine Media – www.timelinedc.com
703-864-8208

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