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Your next step is not guiding, it is learning the procedure of setting up your
mount, and acquiring decent data, and then learning stacking and processing
until it becomes second nature.
Your ED 80 will allow unguided subs of around 90-120 secs, depending upon how well your mount is polar aligned, and where in the sky your target is located, which is plenty long enough to produce some very nice images.
The one single most important thing on the path to great images is processing, all the rest can can be learned in your own good time.
If you are starting out with a DSLR, 90-120 secs @ ISO 800 or 1600 can
produce some great shots.
raymo
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