When doing adjustments, ie. dust removal, curves, levels etc, on a tif file, is there any advantage in doing each adjustment in a new layer, and then flattening before saving as a jpeg, or as the tif is a non destructive file, is it ok to do each adjustment straight to the original Tiff image.

thanks.

The advantage of layers is that you can keep safe the original image and you can fine tune all your adjustments without any limit of time.

A lot of times I changed my opinion on which adjustment an imagine needed after 2-3 days. If I didn't use the layers I had to reprocess the RAW (if I was lucky to have a RAW) just to slightly modify a contrast curve.

I also usually make noise reductions in a duplicate layer so you can go back if needed or apply a mask where you want to have your image tack sharp.

Plus there's a gazillion of effects and adjustments you can achieve just using the different blending modes, effects you can't achieve with filters.

ditto ale,

layers simply let you save your progress in steps allowing you to go back where needed to make adjustments. Like playing a video game, save often in case you make a wrong turn : )

Thank's for the feedback.
Much appreciated