Last week I had a chance to try to measure a transit by exoplanet WASP-11b/HAT-P-10b using my DSLR camera. My equiment used included a Canon Rebel XT (350D) and an 8 inch f/10 SCT. For a period of just over 3 hours, I took a series of one minute exposures at ISO 1600 and calibrated using flat and dark frames. I then used AIP4WIN with the green channel of the images with a selection of about 12 comp stars for ensemble photometry measurements which I've graphed below. The Y axis is magnitude with an arbitrary offset so that I could place the two lightcurves relatively close to each other for comparison. I haven't yet done any tranformations to a standard such as Johnson V since I was only interested in the shape of the curve.
To me, there seems to be a clear drop in brightness consistent with the time and depth as given by http://var2.astro.cz , the web site that I was using as a reference. It also appears that I may have missed the very beginning of the transit since it took me a little longer to set up my gear than I had hoped.
Thanks for looking, and let me know what you think.
-Mike Durkin (DMPA)