Well, trying Moon with Focal Extender 3x. The result wasn't good. I have some photos of Moon with Canon T3, not movie, and they are better.
Perhaps I am having problems with adaptation 1.25" to 2". Focus seems to be another issue. Maybe the seeing didn't help, also.
Actually, I think that for planetary... my Canon 1100D will not work so good as my ASI. Take a look at
http://astronomia-e-astrofotos.10697...SI-td1985.html . Astonish and impressive images !

I can not publish here because the files are very large. More than 200 kb of IIS.
Conclusion of my test: I can use my Canon for planetary, and it will give me some medium quality images. I already did some tests before. I found the images in my site. They are not done with ressource 5x.
http://astronomia-e-astrofotos.10697...T3-td1552.html
The End !