This image is a composite of two, each generated by Registax. The level of detail doesn't quite match and the join is visible near the bottom. Unfortunately I accidentally had the camera set to save images in jpeg only, and I didn't record the conditions, so the exposure details are unknown.

Ottawa, Ontario; April 14, 1:10 PM EDT; Canon XSi on ED120 plus 2xPowermate; Baader visual solar filter; stack of 42 frames.

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