Just wondering if I need to adjust anpre-dawn or post-dusk.
I'll give a bit of a work flow example to help explain my question.
- I useprior with a high and maybe large to get an initial reading, then using a smart photo app, adjust the calculation for 100 and change the
- Change to Bulb mode, set up my intervalometer and key in thetime and set off the , adjust down.
However, if for example it is dawn, and the is going to be for say 2-3min duration, during this time, the ambient shall be increasing as the sun gets closer to the appearing over the horizon and hence the image shall be overexposed. The initial reading is really a point in-time, but the actual is over-time, possible 2-3min even longer.
- Is there a way to calculate what time to decrease toby, or is it a guess, best hunch etc. (This time would have to increased during sunset as the is decreasing)