Quote:
Originally Posted by Merlin66
Actually that's not too bad a result!
What lens were you using?
You'll get a bit more dispersion with a longer focal length telelens - 135mm or even a 200mm.
Have you tried to obtain a profile in Vspec yet?
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Thanks Ken. I was using an 18-55mm lens at 55mm. This was a rough job, LOL - I was holding the cardboard sheet at arm's length while looking through the viewfinder of the camera. In my other lens (55-200) I couldn't get focus at 55mm, let alone 200mm!
Might have to actually set this up, rather than have things waving in the wind.
Anyway, I did graph it and it doesn't come up all that well. Some of the main Fraunhofer lines are there, but not others. Montage attached.
Cheers -