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Since photography/videography is the art of capturing light. Deciding the correct exposure is the most critical element in helping us produce beautiful sequence of images. This topic is about exposure and should apply to most cameras. Nevertheless, we can still reference our cameras. We would like to share our experiences to learn from each other. The three elements that affect exposure: 1) Aperture, decides the amount of light (affects depth of field & the sharpness of the image across the frame) The widest the aperture the shorter the depth of filed and the less the sharpness at the edges of the frame), 2) ISO (Sensitivity to light), each camera has a native ISO value where it performers the best. when shooting Log file most cameras have preset values. 3) Shutter speed (the duration the light takes for a given aperture for each frame/shot) For videography usually it is set at 180 degree or double the frame rate. It is important to mention, that some cameras prefer overexposure than under - especially when shooting RAW - to maximize the dynamic range. Exposing to the right (ETTR) is the technique of adjusting the exposure of an image as high as possible at base ISO (without causing unwanted saturation) to collect the maximum amount of light and thus get the optimum performance out of the digital image sensor (google definition) My experience: a) when shooting with artificial light: I used to shoot with a Sony camera in total manual mode. And since I shoot using Slog the ISO preset at 2000 native value which I could not change. I used to set aperture at the best value to maximize exposure but avoid clipping highlights and I relied on the camera waveform. This way I can easily recover for lost details in the shadows. b) when shooting with ambient light: Currently I use the GH5s using stander profile (I tried vlog but could not get best colors) and I set the camera in Aperture priority mode so I can control which aperture to use. And mostly I use the largest/widest iris to maximize light cause I am shooting in ambient light. I set the ISO to Auto with max at 6400. Cause I am always shooting at widest aperture, the camera will always choose the minimum possible ISO. ( I give vlog another try, with max iso technique) next time we dive after the Corona curfew is lifted. I find ISO 6400 is quite usable with the GH5s. In general and whenever I change camera or technique, I use a color chart as a reference to make sure I get the right colors and exposure. How about you guys? What technique do you use? Stay safe, stay home and I pray to God that the Coronavirus disappears from planet earth for ever in the very near future Here is an article about metering: https://digital-photography-school.com/metering-modes-and-how-your-camera-meter-works/
I have been playing for a few days with the GH5 and I have noticed that in addition to the obvious metering, histograms and zebra pattern the camera has a live waveform monitor. Does anyone use it? Do people with external recorders or monitors use it? I am using HLG to shoot HDR but this applies equally to log or standard shooting
Hi all, In the recent "Wetpixel Ask the Pros" column on wide-angle techniques, one of the questions posed was whether the pros "expose to the right"? Expose to the Right (ETTR) is a technique that deliberately biases exposure towards the highlight end of histogram. The reason for doing this is that nearly 80% of the sensor information is actually recorded in one third of the tonal range-at the highlight end. By exposing the image "perfectly", distributing the sensor information uniformly throughout the histogram range, effectively we are discarding a large amount of image data. For a more in-depth explanation please see Wikepedia or The Luminous Landscape. The technique has generated lots of debate! So, with this in mind, it would be great to know how the Wetpixel community control exposure. Do you Expose to the Right? Or do you go for a uniform distribution? Personally, I try to expose to the right, particularly in scenes that are well lit. In darker scenes, I find it can be a challenge to achieve. The ability of usable high ISO with modern cameras really helps. Adam