![](https://blog.cajunastro.com/wp-content/uploads/2017/01/m51-40x60-400-tv85f5_6-640x426.jpg)
Another Bortle Red Zone image with a relatively short exposure of 40 minutes in 1 minute subs. I have another batch of 1 minute subs taken at ISO 800 to add to this, but here is the preliminary image for the time being.
Update:
![](https://blog.cajunastro.com/wp-content/uploads/2017/01/m51-40x60-400-40x60-800-85f5_6-crop3-640x374.jpg)
![](https://blog.cajunastro.com/wp-content/uploads/2017/01/m51-40x60-400-40x60-800-85f5_6-3-640x422.jpg)
The additional 40×60 sec @ ISO 800 subs-images are added into the mix and the updated full frame image and a close-in crop are above. 🙂
Just for fun, I added the above image with 2 previous images of M51 taken with bigger scopes and the results are below:
![](https://blog.cajunastro.com/wp-content/uploads/2017/01/m51-combined-3-640x374.jpg)