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Hello everbody,Well, that lens seems to not be the sharpest thing ever (just judging from all the Purple and Green Fringes there), but i think the biggest problem here is also depth of field, the Plane of focus, which is actually REALLY sharp is very shallow for Closeups like this. Filming Highspeed video in combination with the Closeup then also means, you propably cant just close the Lens down as much as you might want, to get an bright enough image. Since the Single Sparks fly all over the place, they are rarely actually in focus even if the Sparkler Stick itself is as sharp as you can get it. Also (i attached a croped Part of an image i took a while ago at an wedding), those Sparks never really look that sharp anyways, unless you have pretty high resolution. As you can see in my image, the Lines of the Sparks flying are always pretty wide and will look out of focus most of the time anyways, then the point where it "sparkles" is just a ton of fine lines and sometimes those also again break up into smaller bits. In those locations where they "sparkle" is a lot going on, which is propably too much detail to propperly capture on 720p resolution, unless you manage to get an even Closer Closeup of just one of the Sparks itself in focus. To sum up what i am trying to say, while it looks unsharp, if you look at single frames of the Video, it is propably as sharp as it will get with that lens at that resolution, you can sometimes see some 1px Wide lines, which are just as much in focus as they could.
i tried my look with some sparklers. Tested from 1,500 fps up to 25,00 fps.
I get the feeling, that I can't focus it any better but it still looks out of focus some times
video available in around 2 hours... i have to go to sleep now an let youtube do it's thing
https://youtu.be/E4sjlqmX4F8
PS: I finally get to test the DAIN program at one of my popcorn clips from my last video.
For only one clip that lastet about 20 seconds my computer took around 3 hours to create a 4 times slower video. ... But the result was stunningly good!!!
But for my kind of video hobby youtube thing, this tooks way too long. But maybe for single clips I can use it. But not for the whole video.
Luke, I tried both from your tweet and directly from your youtube channel and no luck on the sparkler video.
Did something a little different. Chronos 1.4 clip shot at 3,587 FPS in 800 X 480 and upscaled to 3200 X 1920 (forgot to do a Black Cal). It definitely won't be as clean, but I just thought I'd play around with it, and this is the best I could do. Additionally, I interpolated the frames 4X using DAIN to simulate 14,348 FPS. I find DAIN to be better at handling motion interpolation artifacts compared to Twixtor. Lens used was a Computar 8mm 1.8.