Or polarizing filters, either. I thought to try out my polarizing filter to see how it intensified the blue sky and brightened the clouds. I learned nothing because I couldn’t figure out which way to turn the filter to achieve the polarizing effect and I couldn’t see the difference through the lens, I presume because the sky isn’t blue enough today nor the clouds white enough. The filter has a dot and a triangle which signify something. I just don’t know what. The clouds were quite striking, though, and I ended up tweaking this photo in Curves, increased the contrast just a bit, and moved the color levels a bit to intensify the blue. I’ll figure out my polarizing filter another day.
70-300 mm lens set at 70mm
ISO 100
f/22
1/100