You can check out all the time lapses I've done here:
Thanks for posting that solar eclipse exposure table. It's very helpful, and much easier to understand than the ones I've seen.
I just need to know the 2nd brightest pixel.
The metering is done using an adjustable sized rectangle in the middle of the screen, and the script normally tries to keep this at the "neutral" value. Additionally, a histogram of the entire sensor area is used to limit over and under exposed pixels in the entire scene to user specified ranges. The relative influence of these limits may be adjusted, and the target exposure may be scaled with absolute scene brightness.
If so, maybe we can discuss it in a different topic.
Yes, of course. But my understanding was, he wants to use this tables in a script. Do you think it’s useful?
Quote from: lapser on 12 / May / 2017, 16:20:31I just need to know the 2nd brightest pixel. I have not really understood what that means. Do you have some more information about this?What is different with what rawopint does?
Another ‚offtopic‘ Question. When you use the SkyTracker, do you have a synchronization between the SkyTracker and the camera?I plan to build a slider and I want to send a signal from the script on the end of the shoot for moving…
The SkyTracker actually makes stars much sharper, especially to the south.
I suspect that you can get away without synchronization in the daytime using a rail, at least for wide angle shots.
I don't recall seeing anything that does exactly what you are looking for. I can take at converting something else is a couple of days.
My script sets the exposure so the value of the 2nd brightest pixel is 1/2 of the white level (adjusted for black level bias). My reference point is 1/2 of white level, or 1 ev (f-stop) below white level.
Would you mind sharing how that is done? Since I only intend to do landscape shots, the sun will appear as a small orange dot moving across the black frame during the partial phases, which I suspect will throw off any type of exposure calculation. However, if exposure could be set to 2nd brightest pixel found in the frame, I'd think that would solve the issue, right?
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