Penumbral Lunar Eclipse

2020 January 11th, a penumbral lunar eclipse happened above Beijing, China. I take this image at about 3:00am local time, 10 minutes before the greatest point. It is obvious that there is a little dark at the down side of the moon.
I recorded the image by video and composed 50 images choosing from about 500 images to get the final one. After sharpening, the lunar crater is very clear even in the dark area.
My equipment:
Telescope: AP130 GTX with field flattener at 873mm, 2X lens, the focus is about 1746mm
Camera: Sony A7RII