Thats a beaut of a picture! You must be doing something better than me. I got up at 4.45am a few days ago to have my first look of Mars through my scope. Only looked like a tiny redish dot. No deatail like your fine picture.
What power were you using? when I have been observing Mars
I've been using 240x to 360x depending on the seeing.
That image was higher again. I unscrewed the optical elements off the x2 barlow and screwed it directly onto the nose barrel of the LPI then I loaded that into a x3 barlow. I did this to give me the magnification I needed. I to tried a couple of days later to get another but just could find the sweet spot in the focusing. I cant handle blurry planetary images so I did bother and just kept observing.
That would give 138x in your 10" f/5 (divide the focal length of your scope with the size of your mirror will give you the f ratio)probably need to use a barlow with that ep for mars at the moment. I use either a either a U/O HD 12mm or a Pentax 10mm XW with a x2 or a x3 barlow for planetary observing. A 7mm to 4 or 5mm ep would give you similar results
You must be doing something better than me. I got up at 4.45am a few days ago to have my first look of Mars through my scope. Only looked like a tiny redish dot. No deatail like your fine picture. 
