Filter question

If i've it correct something like shade or overcast(cloudy) setting should remove the blue cast.

If you shoot in RAW you can change the WB to those settings with software to see what it does.

It's not so much removing the blue cast (I can do that in PP), it's reducing the light scattering, which occurs more at the blue end of the spectrum, when I take the picture.

That's something very different indeed.
Try a Haze filter, it cuts some of the blue light, UV and UV-A, maybe that might help.

I use a UV filter, but to be honest, it doesn't seem to make any difference at all. I think I will try experimenting with different WB and see if that makes any difference. I know that IR pictures have far less haze, so I will try shifting the WB to the red end of the spectrum and see if that makes any difference, though I would guess the blue light is still reaching the sensor so it might not make any difference once I adjust the WB in PP. I don't have enough technical knowledge to know the answer to that, so I will experiment. I am also going to order a couple of Tiffen haze-1 filters, which apparently stop a lot more UV than the Hoya filters I use at the moment.

Intersting, John, so changing the WB will obviously not make any difference. I just found this chart, so I will try the Tiffen Haze-1 filters, which were also recommended by a guy who shoots from a paraglider.

I've just ordered a couple of Haze 2A filters, so I hope they work! I had no idea that normal UV filters didn't block much UV.

UV filters do block UV but the lens coating and the filter infront of the sensor also cuts UV so in the end they hardly make a difference.
But hopefully the more powerful ones do make a difference though.

I just got a reply from Lee filters offering to make me a custom filter, but only in 8 months time when they have the capacity to work on new designs! No mention of price (I imagine it would cost a fortune), I did however offer to field test one for them

Adams (1980, p. 168 ) recommends a No 12 (minus blue) filter for removing haze (which is a deep yellow) so I guess what you need is a graduated version of that. What colour are the Tiffen Haze filters?

K.

PS Whatever bright spark decided to make 8 ) (without the space) the code for a smiley needs a kick...

The haze filters are a bit orange (brwon) from colour but from all that i've read they recommend red or yellow filters for B&W so how Adams came with using a blue filter?

The Tiffen filters are supposed to be neutral. They also do one with a slight orange tinge, but a paraglider chappy I know who shoots a lot of aerial stuff uses the haze-1, but says the haze-2a are better. In Lightroom, a yellow/slightly orange filter gives more contrast. I am thinking of trying the UV filter with a yellow grad, but the Tiffen ones cost a fortune.

womble actually said a "minus blue" filter, which is deep yellow, orange or red in terms of black and white images.

For colour film, a light straw colour, perhaps an 81A to warm the scene as well.

uhmmm he didn't said that at first, he changed it after mine comment
He simply said a blue filter.