A guy at the star party in Tucson pointed out my focus was soft on every shot, and he was right

Rowan Lopez · 2026-10-17T11:00:02.964995+00:00

I shoot with a 135mm lens on a tracking mount and last month at a star party near Tucson a guy looked at my laptop screen and said my stars looked like little fuzzy cotton balls, not points. He showed me how to use a Bahtinov mask and now my focus takes about 30 seconds instead of me guessing with the live view for 10 minutes. Do you all use a mask or do you have another trick that works better on short lenses?

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A guy at the star party in Tucson pointed out my focus was soft on every shot, and he was right | Astronomy Photos - The Community Guide