Spectrum of Delta2 Lyr from Jun 2021. Using a Star Analyzer 100 grating, 70mm Stellarvue refractor, and and Imaging Source camera. Analysis and graph generation was done using RSpec. The red line is my measured spectrum and the blue line is a reference spectrum of an M4 type star for comparison.

The chromatic aberration seemed to be significant, although I was pleased with some of the infrared lines that the camera was able to pick up. There does seem to be some issue with the calibration since most of the absorption lines don't quite match up with the reference spectrum.