Hello, PF. I'm a simple high school student who likes a challenge, and as such, I decided to put together a research project involving reading spectral lines from photographs I took. I got the lens, I got the camera, I got pictures, and now I'm stumped. Reading up on Rpsec, a lot of it's users heralded it as "one of the easiest programs to use" for this kind of stuff. Much to my disappointment, it appears the people who said that probably had a more extensive knowledge of the subject than I did when they used it. http://filesmelt.com/dl/calibratedimage.png [Broken] I've calibrated the image (at least I think I did, if I did something wrong, for the love of all that is good tell me), and I don't know where to go from here. If I'm too far over my head and this is a dead end, just tell me and spare the sympathy, I'd rather not waste time with a dead-end project. If it can be done, I implore you to reveal the secret.