AR3687 NIR 950nm-1050nm baader Sloan Y
Taken by Apollo Lasky on May 22, 2024 @
Naperville, il
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Details:
Using a baader planetarium Sloan Y filter, I was imaging these great looking sunspots at Near infrared wavelengths between 950nm and 1050nm with a highspeed basler aca720-520um camera at 420 frames per second. Telescope used was an astrotech 130mm triplet with a standard meade shorty 2x barlow functioning at around 3x with a 1 inch spacer. My primary filter is a 150mm tiffen ultrapol circular polarizer covering the objective which allows me to control the brightness to desired levels at the camera without needing an actual solar filter.
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