About half the truck wheels sold today are aluminum rather than steel. As with anything, there are trade-offs when comparing steel and aluminum wheels. Aluminum wheels weigh less but cost more than steel wheels. Aluminum wheels don’t rust, of course, but they can suffer from flange wear. Alcoa recommends checking for excessive flange wear using a simple go-no go gauge (Part No. 000700).Here’s a photograph of the gauge in use. (Click on image to enlarge, then click on back arrow to return.)While the gauge is quite easy to use, it is more challenging to photograph. It can be tricky to hold the thin aluminum gauge in the proper position while also making a photograph. To make the photograph above, I used a Wimberley The Plamp II with one end clamped on the wheel center hole, and the other end clamped to the gauge.The Plamp II is fantastic since it is flexible enough to get into any position, yet stiff enough to remain in place once released. Here’s a link on B&H: Wimberley The Plamp II from B&H. The Plamp II allowed me to quickly and steadily hold the Alcoa gauge perpendicular to the rim and properly up against the flange. It was easy to focus and shoot without any motion from trying to hold the gauge by hand. It also allowed me to get the flashes into position with no shadows from my arm across the photo.
If you need to photograph something like a gauge or ruler, it is worth taking the few minutes to secure it and light it properly. You can often just tape it in place, but that wouldn’t have worked to position this flange wear gauge.
Glare on the glass globes can obscure the filaments when photographing light bulbs. This first photo shows the effects of overhead lights reflecting on the bulb. (LO refers to Left Outside taillight bulb.) (Click on image to enlarge, then click on back arrow to return.)Below is the setup that was used to create that photo.The bulb was held in place with a Wimberley The Plamp II, and the camera was locked down on a studio camera stand. The white cabinet door was used as the background. Note that the flash was not used.
All the glare from the overhead lights was eliminated by placing a translucent umbrella on a small light stand above the bulb. That umbrella was lowered and moved around until all of the glare from the overhead lights was gone. Here’s what the setup looked like with that simple change.As you can see below, the resulting photograph had no glare, and clearly showed the filaments and the posts.Translucent umbrellas have the advantages of being inexpensive (well, except for this one by Profoto), lightweight, and compact. So this setup can be used anywhere outdoors or indoors, with a tripod replacing the studio stand. When using outdoors, typically you’ll just have one source of glare from the sun. Many times, you’ll be able to just prop the umbrella on the vehicle or ground without needing a light stand or some other holder. If it’s dark or shaded, you might need supplemental lighting (flash, LED, or other light sources). These can be fired through the translucent umbrella to prevent glare from them. That will be the subject of a future post.
Including a scale in a photograph is an excellent way to document dimensions. But it’s essential to properly position the camera to record an accurate measurement.
One of the most common mistakes made when photographing scales or rulers is making the photo from an angle. The camera lens must be perpendicular to the scale, both vertically and horizontally. A camera positioned too low or too high, and correspondingly tilted up or down, will result in parallax distortion. Worse is a horizontal offset that results in misleading measurements due to the angle of the camera to the scale markings.
Take this example made to show how far a mirror protruded from the side of a van. The first photo was taken at the proper scale height, but was at an angle to the scale. Note how different the reading appears in the second image with the camera perpendicular to the scale. The latter accurately showed the measurement. (Click on image to enlarge, then click on back arrow to return.)Making an accurate photograph requires several steps:
-1- Make sure the pocket rod is parallel with the ground. Use something like a Wimberley Plamp clamped onto the upper mirror support arm to hold it at the proper height. Place the other end of the pocket rod firmly against the ground with enough pressure to hold the rod in proper position and angle.
-2- With the camera on a tripod, make sure the center of the lens is vertically level with the pocket rod.
-3- Move the tripod until the center of the lens is centered on pocket rod horizontally.
-4- Use a hot shoe bubble level or the in-camera level to make sure camera is level.
-5- Manually focus, or make sure your autofocus point is directly on the scale.
-6- Use a normal (50mm) or longer focal length to eliminate wide angle lens distortion. Macro lenses are ideal because of their flat field and edge-to-edge sharpness.
-7- Use fill flash to balance image, despite abundant sunshine.
Use scales, but take care to get the camera in position to show them accurately. Fortunately, you can check the results on your camera’s LCD (zoom the view if necessary) to make sure the dimension in the photograph matches the measurement you made. Fairly close isn’t accurate, and is misleading. A deceptive photo is worse than no photo at all.
When using flash, you can control how bright or dark the background by controlling your ambient exposure. A lot of people are afraid of flash, but it’s just another source of light. And it’s light you control.
As an example, while you’d never choose this busy background, let’s assume you need to shoot a light bulb indoors with a window in the background. Start with an ambient light shot like this. (Click on image to enlarge, then click on back arrow to return.)The scene out the window in the background is bright, but properly exposed. As a result, the bulb is almost in silhouette.
To bring out detail in the bulb, add a flash at 1/8 power in manual mode off camera to the right. Note this is the same exposure as the first image. The only change is the added fill flash.This brings out details in the bulb, but the bright background remains distracting.
To darken the background, keep the flash setting (1/8 power), the ISO (64), and the aperture (f/14) constant. Then reduce the shutter speed to reduce ambient light. Here, the shutter speed was reduced from 2.0 seconds to 1/250 second.Now, the ambient exposure is so low that most of the background light won’t register. Keeping a consistent amount of flash light on the bulb keeps the exposure constant on the bulb, but darkens the background almost to black.
Again, while you’d never choose such a background as this, this example shows that you can control the brightness of any background simply by using flash and changing shutter speed.
How do you hold loose items in place long enough to photograph them, especially when you’re by yourself? I encounter this with almost every tire failure and vehicle I analyze. I have tried every Velcro strap, bungee cord, string, wire, rope, and tape I can find. Each worked—a little. But I kept searching for a clean, simple, and reusable solution for years. I finally found it at The Home Depot! It’s a reusable rubber tie called Gear Tie by Nite Ize. You can get them at The Home Depot, Amazon, or directly from Nite Ize: Nite Ize Gear Ties (Click on image to enlarge, then click on back arrow to return.)Gear Ties are available from 3″ through 64″. I’ve found the 32″ and 64″ most useful for securing passenger/light truck and medium/heavy truck tire pieces, respectively.You can also use them to hold sprung doors, loose bumper covers, and loose pipes or wires in place while you photograph them. Conversely, Gear Ties are also handy for holding wires, trim, etc., out of your photographs.
Here’s an example where two 32″ Gear Ties are holding two separated pieces from a passenger tire in place so I can photograph them.I carry sizes from 12″ through 64″ with me. You won’t find more useful “third hands”. Highly recommended.
Photographing through a windshield for a driver’s eye view or for an accident site drive-through usually results in an unwanted color cast in the resulting images, regardless of your white balance (WB) setting. It can be most noticeable in Auto WB. This is due to the tint of the windshield. (Click on the images to enlarge, then click on the back arrow to return to the post.)If you shoot raw files, you can correct this in your raw processor if there is a neutral-colored item in the scene. But if you’re shooting in JPEG, or if you’re taking a series of images while driving through a scene, you’ll want to get it right in the camera. WB can be difficult to adjust later, especially if there is no neutral tone in your image.
Setting a custom white balance, called Preset white balance on Nikon, varies from camera to camera, but is usually pretty straightforward. On Nikon, you enter the Preset white balance menu, point your camera toward a white or neutral source, and push the WB button. A custom WB is now set until you change it. With Canon, there is an extra step. After entering the custom white balance menu, you take and save a photograph of your neutral source. You then tell the camera to use that photograph for your WB for subsequent images.
If you’re shooting through any glass, your white or neutral source needs to be on the other side of the glass from your camera, and generally in the same light as the scene you’re about to photograph. This can be tricky when you’re by yourself or alongside a busy road.
Both my trucks are white, so I point my Nikon toward their hoods (as long as they’re roughly in the same light as the scene I’m shooting), and press the WB button in PRE mode to save the new preset. Now I have correct colors for my scene. I can then drive down the road, and all the images I capture will have a consistent, correct white balance.What if you’re vehicle isn’t white? In a case like the scene shown here, you can set your custom white balance using the road (or a nearby sidewalk), as long as you can fill a good part of the frame with it. You might have to use a telephoto lens or zoom to isolate sections of your neutral source, but that will still give you a good custom WB.
Four more tips:
-1- DON’T DO THIS WHILE YOU’RE DRIVING!!! Like shown in these photos, set your custom WB from the shoulder of the road or even from a nearby parking lot.
-2- If you are using a polarizer, make sure you put the polarizer on and rotate it to get the effect you want before you set your custom WB.
-3- Don’t set your custom WB while you’re standing outside of a vehicle, then get in and start shooting through the windshield. The WB won’t be correct, and you’ll be back to your original problem.
-4- Don’t forget to change your WB after you’re done shooting through your windshield, or your subsequent images will have an undesirable color cast.
Here are examples in full sun:Like everything in photography (and in life, for that matter), it may take a little practice before this becomes second nature. Make sure you practice setting your custom WB through your own vehicle’s windshield before trying it for the first time at an accident site.
At times, when you get to an accident site, the paint marks made by investigating officers have faded such that they don’t readily show up in photographs. (Click to enlarge, then back arrow to return.)While these can still be documented and measured, it would be helpful to show them more distinctly in your photographs.
You can easily enhance paint marks in Photoshop using a mask on a Hue Saturation layer:
-1- Make a loose selection around the marks with the lasso tool.
-2- Feather the selection.
-3- Select the paint color using the Targeted Adjustment Tool.
-4- Increase saturation until the paint marks are distinct. In this case, I increased the saturation of the red channel to 100%.To ensure I didn’t enhance the yellow lane stripes, I added them to the mask by simply painting out areas I didn’t want enhanced using a feathered black brush.
I only shoot raw images, so I can’t save over my original image. When making adjustments with layers, like these localized saturation enhancements, I save the image with all its layers and masks as a native Photoshop PSD file. That way, I always have the original image I made, and can document that I have only enhanced, and not altered, the photograph.
Before tempered or other safety glass was developed, older plate glass-based windows were used on most vehicles. One of the downsides was the dangerous ways the old windows would break during a collision. Instead of shattering into pieces, holes or pieces would break out, resulting in a “glass necklace”, which was hardly a fashion accessory, and could often be lethal.
Here’s an example of a hole punched through the side glass window of an old car in the former junkyard of Old Car City USA (Old Car City USA): (Click to enlarge image, then back arrow to return to post.)Another reason to be grateful for modern safety standards.
In November 2017, I returned to a photographer’s and car enthusiast’s paradise: Old Car City USA in White, GA: Old Car City USA. It’s a sprawling former junkyard through trees and pine needles with about 4,000 cars and nearly seven miles of trails. They no longer sell parts there, but it now exists as an outdoor museum to old, discarded, sometimes wrecked cars, trucks, and buses. As an automotive engineer who has spent more than 35 years dealing with tires and automotive safety systems, Old Car City USA is a gold mine for experiencing the history of automobiles. As a photographer, Old Car City USA is a never-ending source of vehicle, abstract, and macro detail shots. The ever-changing light through the trees keeps the photography interesting and challenging throughout the day.
We all know about steering columns that collapse and move so they don’t impale the driver. But that wasn’t always the case. Here’s an example of a steering wheel and steering column that would have pinned the driver in position before impaling him or her as the column was driven rearward in a frontal collision. (Click on image to enlarge, then on back arrow to return to post.)Thank goodness for the current designs!
This photo also shows a tire inflation plate for 5.0×15 tires showing recommended air pressures of 15 psi front and 23 psi rear. Even for those old bias tires, those pressures seem unbelievably low compared to what we see today. Here is that plate more closely. (Click to enlarge, back arrow to return.)
When I travel for a work or a personal photography trip, I either drive my Toyota 4Runner TRD Pro or rent an SUV so I can easily access my gear in the field. Years ago, my friend and mentor Bruce Dale suggested a cheap, easy way to keep prying eyes from cargo and luggage in the back. It’s a black flat bed sheet. I bought two of them at Walmart; one for my 4Runner and one to keep packed in my travel bag. They’ve become the black sheets of my family. (Sorry, couldn’t resist.) (Click to enlarge, then back arrow to return.)If I’m going to be parking any distance from the inspection site, I try not to keep valuables in my vehicle, if possible. But I’ll still cover even extra jackets, water, snacks, or empty camera bags or luggage. I find the black sheet most useful when going to and from my shooting or working location, at airports, restaurants, and hotels, and when stopping at any store or gas station. It’s cheap, simple deterrence. I even use it day-to-day when I’m at home.