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Hello Peggy,
I suppose the first thing I wonder about is the kind of astrophotohraphy you want to do as when i look at your signature i do not think the celestron 130 will reach focus with a dslr attached as one of my school kids can not achieve focus with his and i have read the same. The dob may be the same as when we attached our canon 400d into it we could not get the thing to focus as we could not wind the focussed in any further. So unless you intend to upgrade equipment it probably leaves the DSLR to very short tripod exposures with different lenses or if you head down the ccd path where you video things like the moon planets. You could do star trails or look at the vixen polarity that will allow you to do widefield with tracking. Have a look at some of the stunning widefield images in the photography section. I get an enormous amount of satisfaction doing astrophotography be it star trails, widefield, solarsystem or deep sky.
Mark.
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