This past fall, I attended several car shows on the lawn of the Larz Anderson Auto Museum in Brookline, MA. I usually carried two cameras. First, attached to a carabiner on my belt I clipped the Sony NEX-6 with the kit 16-50 zoom lens for my wide and normal angle shots. On my shoulder I carried the Olympus E-M5 with the 75mm lens.
The images shared below are with the 75mm lens. Some are "people" shots which I was able to get from a distance. Other shots are my attempts at being creative with the cars and the shallow depth of field of the 75mm lens.
Depending on your monitor resolution, larger images are available for viewing here:
http://www.peterfraileyphoto.com/p757525090
Camera Settings for the 75mm lens
Cars Outdoors:
For outdoor pictures often the problem is too much light when shooting at wide aperture (the above were shot at F2). I believe all of the car photos were done with the E-M5 with its maximum shutter speed of 1/4000sec. In this case, using Aperture Priority and AutoISO you will without-a-doubt get only ISO200 and the camera will speed up the shutter to a level far above my minimum required speed of 1/125sec or 1/160sec for this lens and nearly stationary subjects. Indeed, there were times when the shutter maxed out at 1/4000th and I wished I'd brought a neutral density (ND) filter or even a polarizer to cut down the light. (This is one reason I am pleased that the new Olympus E-M1 has a maximum shutter speed of 1/8000sec.)