Quote:
Originally Posted by Amaranthus
Nice work, and gives me a great feel for it! I really like 47 Tuc. For the brighter objects, can you control the CA (photographically) by taking shorter exposures?
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No not really. A good photographic filter combination is a CLS stacked with a Semi-Apo filter and exposure longer. That's a pretty heavy CA killer.
As for stopping down, yes that reduces the CA but may as well use a smaller scope so I don't bother as I already have an ED80.
This is the prawn nebula single frame with a CLS / Semi-Apo combination stacked onto each other. There's not much CA left.