For starters, considering the conditions, that is a mighty fine image indeed! You should be very happy with that!
The flattener seems to do a brilliant job, that field looks stunning in the 100% size image..
Tell me, did you notice a focal length increase when using the FF IV vs the scope at native F/L? From what I understand the type IV gives a 1.1~1.2x increase in F/L as opposed to the 0.8x~0x reduction given by other flatteners.. What are your thoughts?
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