By the way, if one tries to set exposure low to keep from clipping all the light sources and specular highlights, he is, most probably, also wasting a couple of stops of dynamic range. That is, if we try to expose a pixel hotter than its capacity allows, everything that is above the capacity will pour out, causing blown-out highlights. In digital photography we know this as highlight clipping. In a sense, one can say that dynamic range characterizes the depth, and starts from the top, while the bottom is sort of fuzzy because of individual tolerance to noise, viewing conditions, size of the output, etc.īack to our bucket analogy – if one tries to pour, say, 2.5 gallons in it, an overflow happens, and half a gallon will end up on the floor. This immediately means that in order to use the dynamic range of the camera to its fullest and simultaneously to have as little shadow noise as possible, the whitest whites where you want to keep some texture details need to be exposed so that they are just below clipping. If your whitest white is not exposed to the maximum, the top portion of the dynamic range is not being used. If you do not fill it up to the top, some volume is wasted. Imagine a bucket having a volume of 2 gallons. The thing with a camera’s dynamic range is that those exciting numbers become valid only when the signal reaches the maximum that is, the exposure is the hottest possible for the given camera at a given ISO. Applied Shadow Boost and +1.67 EV exposure correction.Īs we can see, shot #4152 exhibits significant noise everywhere below midtone. Zoom into shot #4152 that was exposed according to the in-camera exposure meter. The SIGMA fp L offers quite some interesting specs, boasting a whopping 61MP sensor.Figure 3. The body is super small for a full frame camera, offering a decent rear screen and now a viewfinder as an accessory. a Samsung T5), 12bit Cinema DNG 4K RAW files can be recorded. So without further delay, lets have a look how this little camera fares in our lab test. Rolling Shutter of the SIGMA fp LĪ LOT of incomplete information was given by others when it comes to the rolling shutter performance of the new camera. Here at CineD we do our best to give you the full picture and we can only hope that others will follow by adjusting their conclusion. After all, accurate information will help people to make the right purchasing decisions and obtaining knowledge in general. Now, here is where things get interesting. If you ask me about rolling shutter, I have to ask “at which crop factor?”. The SIGMA fp L offers an interesting feature, allowing to set crop factors from 1 to 5 when shooting in Full HD and up to 2.5 when filming in UHD. #FASTRAWVIEWER DYNAMIC RANGE FOR SPECIFIC CAMERA ISO FULL# When talking with Wakamatsu-san, we clearly established that crop factor has a direct influence on how the SIGMA fp L behaves. See below how it changes when recording in UHD mode: The performance of dynamic range, resolution, and autofocus, are all tightly connected to the chosen crop factor, and not surprisingly, depending on the individual crop factor, rolling shutter performance, too. Rolling shutter for 3840×2160 recording in for various crop options on the SIGMA fp L. Image credit: CineDĪs can be seen, at crop = 1 (full frame), the rolling shutter starts at 21.7. Which is a quite average value – about 0.9 higher than its predecessor, the SIGMA fp. Quite interestingly, cropping into the image lowers the rolling shutter, reaching it’s minimum of 17.5 at 1.24x crop factor. #FASTRAWVIEWER DYNAMIC RANGE FOR SPECIFIC CAMERA ISO FULL#īut don’t go to the next 1.3x crop factor – here the rolling shutter shows it’s highest value at 31 – a value that leaves a lot to be desired! This is a quite decent rolling shutter for an APS-H like frame at 1.24 crop.
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