Full MANUAL Exposure Control vs Shutter Priority AUTO?
I have been a strong advocate for full MANUAL exposure control for high speed video where the shutter speed, aperture and ISO are set. I am not sure of the relative performance of Shutter Priority (AUTO) or the current availability of high speed video cameras (>60p fps) with Shutter Priority (AUTO). I hope that I have not steered someone away from a capable HSV camera that has Shutter Priority but no full MANUAL control, (hopefully, to be determined soon……).
Shutter Priority mode is an AUTO exposure mode that allows the shutter speed to be selected by the photographer and the camera’s AUTO exposure control to select other settings in order to get a video of the desired brightness. If Shutter Priority (AUTO) is available for video or high speed video modes then it should allow faster shutter speeds that produce smaller motion blur.
Aperture Priority mode sets the aperture and the camera AUTO adjusts the shutter speed. Motion blur would be unknown, probably rarely desirable for video motion studies.
Mode descriptions for a SLR camera: Full MANUAL, Full AUTO, Shutter Priority (AUTO), Aperture Priority (AUTO)
http://imaging.nikon.com/history/basics/04/06.htm
http://en.wikipedia.org/wiki/Exposure_%28photography%29
See discussion of lighting issues for using full Manual.
http://www.picturecorrect.com/tips/aper … nual-mode/
Exposure Compensation (‘EV’) adds or subtracts exposure when in AUTO modes.
http://imaging.nikon.com/history/basics/04/07.htm
I believe that the proper use of the term ‘Exposure’ should relate to the actual number of photons collected by the sensor. Both aperture and shutter speed affect the number of photons collected. In addition, after photons are collected and converted to electrons in the sensor, amplification of the sensor output (controlled by the ISO setting) also affects the brightness of the video. In Internet usage, the term ‘Exposure’ may not be consistently used with the idea of separating exposure (in photons) and ISO amplification (resulting output electrons).
See “best answer” reply
http://answers.yahoo.com/question/index … 308AA1q6Ti
My Casio FH100 in AUTO modes (S, A) uses both exposure and ISO together to adjust video brightness. ‘EV’ compensation is available in AUTO modes. In full MANUAL mode (M) ISO still can be left on an “AUTO” but the videos are very dark for some reason. ?
Again, I’d advise anyone interested in high speed video to get a full MANUAL exposure control camera. Unfortunately, I don’t know of any affordable HSV cameras with full MANUAL in 2012 that are now being manufactured. An AUTO exposure control HSV camera with Shutter Priority might do as well regarding shutter speed with somewhat less flexibility regarding video brightness (?). Full AUTO will select an unknown shutter speed that will likely vary with light level.
Which HSV cameras have Shutter Priority? I’m not able to say what features the many models of AUTO control high speed video cameras have and don’t have.
CAMERA SPECS. – It is often not clear in the specs, as listed, whether the spec applies only to the camera’s still photography or also to all video modes. For any camera that you are considering, it is necessary to double check the specs. The user’s manuals can be downloaded. Check with people who own the camera.
CASIO EX ZR300. The Casio Ex ZR300 does not support Shutter Priority in high speed video mode based on the following.
http://forums.dpreview.com/forums/post/42191777
According to the Casio Ex ZR300 user’s manual that I downloaded, “Note”, on page 69 -
"The A, S and M recording modes are not supported when shooting a movie, or when using the "Prerecord (Movie)" and "For Youtube" BEST SHOT scenes. In these cases, the recording mode is always Auto."
PDF: http://support.casio.com/pdf/001/EXZR30 … 0619_E.pdf
There are other similar dpreview threads that discuss the Casio ZR100 and ZR200. The new ZR1000 does not yet have a user's manual available on the Casio support website.
There are Youtube videos comparing cameras or discussing HSV and shutters.
ZR200- No Shutter Priority or full MANUAL shutter speed control.
http://www.youtube.com/watch?v=TwC4sK89d68
ZR100- Review & Comparison to the FH100, at 2:50 he is saying that the ZR100 does not have Shutter Priority to set the shutter speed.
http://www.youtube.com/watch?v=SNut_kshlYM
To see if a camera is capable of small motion blur one approach is to search on Youtube ‘golf swing & camera model’ etc. and look for motion blur from the side view of a golf swing. There is no way to know if the camera was operated to minimize motion blur.
ZR200 - Motion blur.
http://www.youtube.com/watch?v=TWZ6MsKt5sw