It might be saving in 32bits, I have always had problems with the autosaved .tifs and master darks, mainly photoshop doesn't want to open them and says I don't have enough RAM. Even Gimp when it does open them reduces it to 8 bits.
Where abouts would I change the save settings so it doesn't save in 32 bits?
Normaly I would ignore the DSS adjustments and take the greyish image straight to curves but this has thrown me as I haven't changed anything to my knowledge and really there is not enough data in the darkened image to pull anything out.
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