Hi, I recently came into possession of a 10 stop ND filter so wanted to give it a go today, having never used one. Things I did wrong: 1. I went around 5pm to take the shot, which resulted in a 4 minute exposure time - I know now for 10 stop you need to take it in the day 2. I didn't have a step up ring (the ND was 77mm) but I was really eager to give it a go so I just held it in front of the lens for 4 minutes My settings that I used: 1. 12-40mm at 23mm on f/8 and focused to infinity 2. ISO 200 3. 4 minute exposure 4. Noise reduction was on (so exposure 4 minutes, then wait 4 minutes) I've resized the picture down to 1920 resolution from the RAW file, no other PP has been done. I've also attached a 1:1 from the high resolution image. Do you guys have any tips for long exposure on how I can improve for next time? Is f/8 and focus to infinity correct? The pier seems quite out of focus, perhaps it wasn't the best setting? Is the noise acceptable? I presume if I did it properly in the day with a 30 second to 1 minute exposure the noise would be a lot less? I was hoping the noise would be very minimal with the noise frame subtraction, but it looks still quite high (but I guess 4 minute exposure is quite long) Thanks!