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Jan Behrens

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  1. Yes, that's why I would like to record 50 fps with a 1/50s shutter. For normal-speed scenes, I would drop every other frame, giving me: 25 fps with a 180° shutterAdditionally, if all frames are used (and not just every other frame), I could use the material as follows: 50 fps with a 360° shutter (yes slightly blurry, but I doubt it's so noticable at 50 fps? I assume the blurriness of 360° at 25 fps is much more noticable than 360° at 50 fps... but I may be wrong?)2x slow-motion at 25 fps with a 360° shutter (also with the blurry effect, but that might even be an interesting effect during slow-motion sequences) ​That's what I want: a fine look at 25 fps, but still having the option for special effects using the extra frames in post production (even if, for slow-motion, I have to accept a 360° shutter). But to allow that, I would need to record at 50 fps with a 1/50s shutter, which seems to be not possible with the Samsung NX1 (as of firmware v1.21). And I wonder if there are technical reasons, or whether it would be just an easy-to-fix firmware issue (and whether other cameras allow this mode of operation). I am aware of the drawbacks (higher bitrate, blurriness when all frames are used, etc.), but I still would like to have that option at least for certain recordings. For the same reasons, recording in 48 fps would be nice... P.S.: I just figured out the Samsung NX1 allows recording at 100 fps and 120 fps too! At least it looks like that to me... The ability is somewhat hidden here: Menu -> Video -> Fast / Slow Movie If the camera is set to 1920 x 1080 and a frame rate of 25, 29.97 (displayed as 30), 50, or 59.94 (displayed as 60), then the "Fast/Slow Movie" option seems to allow you to increase the actual frame rate up to "100p" or "120p" (I assume that is 119.880 fps). The frame rate in the header will be 25, 29.97, 50, or 59.94 though, but the recording seems to be done with 100 or 119.880 fps respectively. I didn't know this was possible! However, it doesn't allow you to record at 48 fps or 47.952 fps :-( The shutter speed seems to be limited to 1/125s minimum if you record at 119.880 fps. The same limit (1/125s) seems to be the case if I try to record at 100 fps by selecting 25 fps and 1/4 slow-motion. If I select 50 fps and 1/2 slow-motion, however, the shutter speed can be set to 1/60s. The latter behavior seems to be a firmware bug, I assume?
  2. Hello, Regarding Samsung's firmware (v1.21) for the NX1, I have a question for the videographers on this forum. I would like to record clips with a high frame rate (e.g. 50 fps) while not giving up the ability to later use them in lower frame rate video productions (e.g. 25 fps). Recording my footage with a high frame rate would allow me to do slow motion in post-processing. If the higher frame rate is a multiple of the lower frame rate, then I should be able to integrate the high-fps footage in my low-fps productions without judder. The Samsung NX1 seems to allow for the following frame rates as of firmware version 1.21: 23.976 fps24 fps25 fps29.970 fps50 fps59.940 fpsRegarding 59.94 fps vs. 60 fps, see this thread on dpreview: http://***URL removed***/forums/post/55323196 Considering that I would like my lower frame rate to be very close to the cinematic feel of 24 fps, the only possible combination of frame rate pairs seems to be 25/50 fps (and not 29.97/59.94 fps). However, for a low frame rate movie, you usually want a 180° shutter, i.e. if you record at 25 fps, the shutter will usually be something like 1/50s. According to what I learned, choosing a faster shutter will lead to a too "crispy" motion (not enough motion blur). While the NX1 may record 24, 25, and 29.97 fps videos with a 1/30s shutter, the NX1 will record 50 and 59.94 fps videos only with a shutter speed of 1/60s or faster. Therefore, it is impossible to realize a 180° shutter for 25 fps movies where you use footage that has been recorded at 50 fps with the NX1 (because that footage will have a shutter speed of at least 1/60s), right? I wonder whether the 1/60s shutter limitation at 50 fps has technical reasons or whether this is a bug? Maybe it's really just a software issue that could be fixed easily? How do other DSLR's and mirrorless cameras behave in that regard? I have been asking this question also on http://***URL removed***/forums/post/55360098 and I have been referred to this forum (EOSHD). Kind Regards Jan
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