Ive been going over some of my old data spent a few hours reprocessing the area around ngc4216
Exposure time was 4x15mins in L 3x530 in Blue 3x420 in Green and 3x600 in Red with the usual kit AG12 and H35 ccd
cheers Peter
http://www.astropix.co.uk/ps/images/a0947.jpg crop
http://www.astropix.co.uk/ps/images/a0948.jpg Full field
http://www.astropix.co.uk/ps/images/a0946.jpg extreme crop of a few fuzzies