The top of G-deck turned out to be a good decision. There were a few other people there, but nothing like the crowds in Woodruff park (where I understand fights broke out over viewing equipment.)
I used a regular photographic tripod, which is decidedly sup-optimal for astronomy, but good enough for this purpose.
You can see how the shadow appears to roll over the sun in the sequence below.
I ordered a solar filter for my long lense. It looks something like a very fragile and expensive piece of tinfoil, but works.
Even with that filter, getting the exposure correct can be a bugger. I ended up in manual mode 1/4000 s f29 iso2000. The featured image shows the results, and, yes, those dots in the middle of the sun are sunspots. So we’re ready to go. I’ll probably play around a bit with the film speed to reduce noise, but this is decent enough to work. I’ll use a tripod tomorrow and be at the top of G-deck.
If you don’t adjust the exposure, the sun is completely washed out. Not at all what you want.
Very preliminary, but we’re announcing Treadco – bespoke machine learning and datamining for the discriminating user.
The name and form might change, but we specialize in highly efficient and highly accurate machine learning and data analysis.
- Fuzzy and probabilistic/possibilistic modeling. Correct handling of uncertainty in both the independent and dependent data improves the robustness of the models.
- Big supervised or unsupervised data problems.
- Model development. Not sure what’s best? Ask us.