I use for the horse head and M42 my 350DBaader with TAMRON AF55-200 F4-5.6 LD MACRO DiII ,this is a good optic ,this picture was taken the 18/february 2007,i take 34 x 1mn exposures at 800iso ,the focal of lens was @200 mm/5.6
I reprocess my photographs with IRIS and photoshop ,IRIS is a great programm :
http://www.astrosurf.com/buil/us/iris/iris.htm
I had just received my Canon350d after defiltrage ,
you can see the modification here:
http://www.astrosurf.com/~buil/350d/350d.htm
http://www.astrosurf.org/buil/baader/eval_us.htm
http://www.astrosurf.org/buil/
the filter can be buying here:
http://www.baader-planetarium.de/zub...m#umbauservice
im very happy with my new 350Da ,now i can take nebula in Halpha, for ex NGC7000,barnard 33,the veil in Cygnus (NGC 6992)
i waiting for summer to take the milky way and a much nebula