On Fri, Feb 1, 2013 at 6:16 AM, Zos Xavius <[email protected]> wrote:
> Has anyone here done anything with time lapse videos? I've done one (with a practice run beforehand): https://vimeo.com/47343983 SHOOTING: I have a K10D. I shot this with a Sigma 10-20/4-5.6 that I rented for the trip. I shot the lens near the 10mm end, wide open. There were no DOF concerns with shooting such a wide lens at f/4, and stopping down can cause flickering brightness because the aperture doesn't stop down exactly the same every time. The shutter speed was 1/750 throughout, ISO 100. I shot in raw, not JPEG. I was shooting at sunset, and the light was going to change during the shoot. Shooting raw gives more latitude to adjust the exposure in processing. (As the sun sets, you want the movie to get darker of course, but not as much as it would with no adjustment. The camera is more sensitive to the changing brightness than our eye are.) Of course, the raw files are pretty big, so depending on the size of your card and the length of your sequence, you might have to shoot JPEG. The K10D has no built-in intervalometer. I used a cheap Chinese intervalometer from eBay, "LCD Timer Shutter Release Remote Control Cord for Canon Pentax Samsung", that I got for $10. It is capable of shooting indefinitely, until you turn it off. PROCESSING: I created the movie using Lightroom and LRTimelapse: http://lrtimelapse.com/ I used LRTimelapse 1.x, which was free/donationware. The new versions 2.x are commercial, and I have not purchased a license, as it seems quite expensive for something I'm not going to use very often. Unfortunately, it doesn't look like 1.x is offered for download anymore. Anyway, the processing followed the tutorials on the LRTimelapse website. Basically, you edit "key frames" in Lightroom, and LRTimelapse interpolates those settings to all the other frames, and you generate the movie in Lightroom's slide show module. LRTimelapse also removes frame-to-frame flicker due to mechanical variations in shutter speed and aperture, or fast-changing lighting. Despite shooting on a fairly heavy tripod, the resulting video was kind of shaky due to wind. I found a good way to stabilize the video. Another friend asked about it, so I wrote up the procedure here: https://dl.dropbox.com/u/20239870/De-shaking%20timelapse%20video.docx The procedure is pretty convoluted, because of inconsistent codec support between tools. It's a Windows workflow. Hope this is of some help. I'm frustrated to find that LRTimelapse 1.x is no longer available; the last version that I had installed was a 1.9.4 beta that has since expired, so now I don't have a working copy anymore, either. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
