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A sensitive guider that uses a CCD for an OAG setup. Lodestar or similar.
I use a NexImage 5 planetary cam or Orion SS G3 as my guider (the latter is my basic mono CDD imager, I use it as a good AG when imaging with my DSLR). Guidescope is either my ED80T CF (when imaging with the C8), or my SW120 achro (when imaging with the ED80T). But most people go for a dedicated 80 mm achro guidescope.
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