They could be even invisible in 12 seconds shutter speed, because they move a lot faster than the bridge. On the other hand, the workers are constantly walking around and checking, if everything is okay. Finally, you’ll get natural, filmic blur on the bridge. The bridge moves constantly for all the time, so 12seconds of exposure will slightly blur it (of course it depends on the distance that the bridge covers in this time). If you want to use the 180° rule here you should choose the shutter speed around 12 seconds. Let’s say it will take 4 hours and you’re shooting with an interval of 24 seconds to get 10 seconds shot. The workers use a technique to slide the previously prepared bridge onto the supports (doesn’t really matter what it is, the point is that’s a very slowly but constantly moving object). Your subject is a bridge construction site. It always depends on what you’re shooting. There is never one solution for timelapse. Interested in Timelapse, Hyperlapse or Stop-Motion? Feel free to join the Facebook Group, where you can find BTS content of my tutorials: I could only suggest – most of the times the 180° shutter angle would look good. That’s something that you should choose on your own, according to your experience. Of course, I won’t tell you that you should use 360°, 180° or 90°. For video shutter angles above 180° are very rarely used, but for timelapse it can give you nice ultra smooth movement (it’s possible to get the 360° shutter angle in low fps video mode, not in photo mode). As you know, you can use shutter angle up to 360°. I would say, that timelapse photography loves long exposure. It’s easier to talk about shutter angle, not shutter speed, because timelapsers use all sort of frame intervals, sometimes it’s 1 second and sometimes even 5 minutes. If not, you probably missed my Cinematic motion blur article, which I mentioned twice already □ I assume that you’re familiar with the shutter angle concept. Now you get 1 second exposure and 2 seconds (1” exposure + 1” interval) overall interval time. But the facts is, 1” exposure with 2 s interval may give you already pleasant image □ If you want to use the real 180° rule for 1” exposure, you should shorten the interval to 1”. So, that means the 1 second exposure time won’t give us a real 180° shutter angle. With shorter exposure time, the simplified method is good enough, but the longer the exposure time, the less accurate that calculation is. In timelapse, if you set your interval in camera for 2 seconds, and exposure time for 1s, you’ll get overall interval time of 3s, because the camera starts counting interval after it takes a picture, not after the previous interval finishes. It’s different than in a video mode, cause in video changing shutter speed won’t affect the interval. However, cameras count intervals as shown in the picture below (for most built-in intervalometers, external devices just release the shutter, so shutter speed won’t affect the interval). What shutter speed should you choose? The simplified method is to take your frame interval, in our example it’s 2s and divide it by 2 – the shutter speed would be 1s. So, let’s say you want to stick to the 180° rule in your timelapse shot. Of course, that’s ridiculous calculation (there are a few situations when you can say you capture only a part of a frame, for example, interlaced video or HDR timelapse □ but it’s for sure not important here). But how about timelapse? When you’re shooting, for example, an interval of 2 seconds, you get 0,5 frames per second. The 180° rule (if you’re not familiar with that, once again, check this post first: POST) is most of the time explaining for 24, 50 or more fps video. If you’re not sure what motion blur is, where it comes from and what is the 180 degree rule, before continuing check out my explaining article HERE.Īpplying 180° rule to timelapse photography In this article, you’ll learn how to make your timelapse shots smoother and more pleasant to watch by controlling the amount of motion blur and how to choose the right ND filter for your camera and the type of work that you do. Motion blur is a very important topic when it comes to distinguishing an amateur timelapse from the more professional one.
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