All I can say Martin, is that you have a 17.3 Delos - do you need anything else? I have an 18" F4.5 and started out with a 13mm T6 and 27mm Panoptic combination. Once I bought the 17.3mm Delos I hardly use any other eyepiece in it, despite splurging on a 26mm T5 Nagler. I probably should have saved my money and not bought the 26mm.
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