Topic: This project is about making photos of a sunset with a Nikon D200. Starting with full daylight photos will be taken until astronomical sunset (sun is at -18 degrees below horizon).
This requires constant adaptation of the cameras settings (ISO / aperture and time) due to the diminishing light.
I will record the luminosity with the Arduino, so I can set the average brightness of the single images afterwards accordingly.
For this I bought several luminosity sensors from Watterott:
- Sparkfun Weather Shield
- TSL2561 light sensor (digital) (0.1 to 40,000 Lux)
- TSL45315 light sensor Breakout (3 Lux bis 220k Lux)
- CoreLight (0.015 lux to 64,000 lux)
I will try which one is the best, measure some sunsets and gauge the camera against it.
In order to better understand what I am doing, I am developing some small tool, which tells me some astronomical data – as the position of the sun by time and date and some star positions.
For this I will look for a better tool than Excel and VBA…
First I downloaded a data base of star positions:
And an OpenGL-Sample containing the pattern of the earth:
A website containing C-code for positions of planets, the moon and the sun (based on the book “Astronomie mit dem Personal Computer” von Oliver Montenbruck und Thomas Pfleger):
Using the TSL2561 light sensor:
- These scripts work fine as well: https://github.com/sparkfun/TSL2561_Luminosity_Sensor_BOB
Using the TSL45315 light sensor:
- The wiring is equal to the TSL2561 light sensor: https://learn.adafruit.com/tsl2561/wiring
Using the CoreLight light sensor:
- Connect as follows: