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Topics - 17barski

#1
I've searched everywhere but still can't figure out where I've went wrong, I'd greatly appreciate any help.

I went out and shot a HDR timelapse of my car in the sunset. Manual mode with everything fixed. Advanced bracket feature set to 5 frames at 2 EV increments with the sequence 0-+--++ (1/50,1/200,1/13,1/800,1/3) and Intervalometer feature set to 10 secs. All seemed fine until I got home and realized the frames don't follow the exposure order.

Essentially I have a folder with 500 pics which in my head means I should have 100 pics at 1/50, 100 at 1/200 and so on. But for some reason I have 179 pics at 1/50 and only 10 at 1/200s, the other shutter speed are more or less around the 100 pics mark.

I'm dying trying to figure this out, pls help, ty
#2
General Help Q&A / Filmback Dimensions For Matchmoving
September 09, 2016, 09:43:09 PM
Any matchmoving software needs horizontal and vertical field of view. This is calculated by using the filmback dimensions of the camera and the focal length of the lens. I'm using a 700D which has a sensor with dimensions of 22.3 x 14.9 mm (3:2) and an 18 mm lens. When I record full HD I know that the camera uses full width of the sensor (22.3 mm) and based on an aspect ratio of 16:9 (1.78) I can obtain the height of 12.544 mm and everything is cool. The problem occurs when I record raw at a reduced resolution of 1600 x 680 (2.35:1) because ML is not using the full width of the sensor. I need to find out what width of the sensor is actually employed by ML (in mm or %) when recording at this resolution.

Thanks for your help.
#3
I'm trying to establish the best workflow for color correcting/grading. Initially I planned to use solely DR, however, after some tests, I came to the conclusion that ACR debayering engine provides much higher quality results. The problem is that I still want to use the benefits that DR has to offer. So my proposed workflow is as follows:

1. Load the .dng's into ACR
2. Modify basic sliders i.e. exposure, sharpness, noise (leave other sliders to prevent flickering during playback)
3. Use VisionLOG profile
4. Export as uncompressed 16-bit .tif's
5. Load the .tif files into DR and  color correct/grade the footage

The VisionLog profile compresses the histogram and should prevent clamping of shadows/highlights when transferring from ACR to DR. The 16-bit .tif's should preserve all the color information for grading. So I ask you more experienced users if this workflow makes sense? Or would it be better to just use DR debayering and grade raw .dng's? I just want to make sure i'm not wasting important data during the conversion.

Thanks for your help, ML is great!