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Greg
I will mostly be long focal length so lets say 25GB per one complete image. My mount has periodic error well less than 1arcsec so I am hoping for unguided 5 minute exposures (although I will get the guide camera). So assuming 20 exposures I would reckon on 512GB SSD.
2TB internal should allow me to store 4 sets of data at any one time, and a 10TB external hard disk should be sufficient for long term storage.
Is there a need for an upgraded Graphics card. My sense is that this is only useful for gaming where quick frame rates are an advantage. I am not sure there is any real benefit for processing astro images, but I am not experienced in such matters. Some advice in this regard would be helpful as a good graphics card costs quite a few $.
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