Video: Incredible X-ray view of what goes on inside a zoom camera lens: Digital photography review
Ever wondered what happens inside a zoom lens as you cycle through different focal lengths? If so, this brilliant X-ray video should help you better understand the mechanics involved in moving the various optical elements around inside the lens.
Ben Krasnow, the person behind the YouTube channel Application Science, took a broken X-ray sensor and repaired it so he could shoot timelapse and stop-motion animations. While the majority of the 21-minute video explains how he built his home X-ray camera system, a very small clip is shown in the video (1:50 timeline) showing a receiver lens. what the zoom looks like when it expands and shrinks. its focal length range.
Krasnow says this stop-motion sequence was shot at around 200–300 frames, and notes that he used a stepping motor to control the camera’s zoom ring between each shot. What we see in the resulting video is three independent optical groups that move together to achieve the proper focal length inside the Panasonic 14–42mm F3.5–5.6 ASPH MEGA OIS Lumix G Vario lens attached to the Panasonic Lumix G1 Micro Four Third camera system.
In her introduction, Krasnow says ‘I try to share something unique in each of my videos.’ So I think it’s safe to say that Krasnow has achieved his goal. If you have the time and enjoy the DIY Tech videos, I recommend you watch the full video to see how Krasnow got his DIY X-ray camera up and running (safely, mind you) . To follow his latest happenings and support his work you can follow him on his YouTube channel, Application Science and follow his blog.
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