Orion 130mm f/7 refractor with 0.8x field flattener-reducer. Canon Rebel T5i modified by Hutech for deep sky astrophotography. Hutech D1 light polution filter.
180 seconds @ ISO 1600
Stacked in Registar
Processed in Photoshop
Noise removed in Topaz Denoise AI
It was late. I had been shooting M51 and M63 when around 11:45 I decided to try for M101. I had not heard about the nova but was just trying to capture one more galaxy before calling it a night. I noticed dew forming on my telescope and finder tube so I increased the ISO from 1600 to 3200 to shorten exposure time even though this would increase the camera noise level. This was a lucky move because after the fourth frame my auto guider was losing track due to dew on its optics. I had to quit at five frames.