[SA Chris]

I'm not sure, hence the question. I think it was in AWB.

[slackline]

Shoot in RAW, unlikely but perhaps there is something strange going on in the JPEG compression.

[dave]

I don't see anything wrong in that shot. The sky is blue, hence the sea is blue.

P.s. why are you using AWB?

[SA Chris]

I was shooting in RAW + JPEG. Had WB on AWB as a default, as I have RAW file of it anyway. Not got round to processing RAW image yet.

Compared to how it looked on the day, the sea is a considerably bluer than it looked, hence the question.

[Johnny Brown]

Shutter speed? I'm guessing the averaging effect of the long exposure necessitated by the filter means the reflections of the sky overwhelm the underlying green/ grey of the sea. When you look with your eyes your eye/ brain no doubt concentrates on the base colour rather than the dancing/ shifting reflections. I'm assuming the sea was rougher than it appears?

[dave]

What Cadfael says.

[SA Chris]

Shutter speed? I'm guessing the averaging effect of the long exposure necessitated by the filter means the reflections of the sky overwhelm the underlying green/ grey of the sea. When you look with your eyes your eye/ brain no doubt concentrates on the base colour rather than the dancing/ shifting reflections. I'm assuming the sea was rougher than it appears?

It was rougher, I suspect you are right, just interested to know the causes behind it. Thanks. Shutter speed 20 secs.

[Johnny Brown]

 

Shutter speed 20 secs.

There you go. If it'd been flat calm I suspect you wouldn't have noticed such a big difference.