After Exposure, I am now looking at Focus, Grain Dissolver and IR cleaning (ICE) in order to improve my technique with my scanner Elite 5400. FOCUS You should always use it. I let you check the results on the attachment (see 'Centre' - crop of a 5400dpi scan). This film is curved, and you will notice that with Auto-focus ON, the centre is very sharp whereas the corner is soft ('Auto-focus OFF' is sharp only in the corner - Its focus plan was here...). Please note that about 90% of the picture is like the center, and was really sharp with Auto-focus ON. It is probably very similar (or better) to what you may find in other scanners (Nikon LS4000...). So, if you have a curved film, you should carefully choose the focus point and check the results. If someone found a way to improve the handling of curved films on the Elite 5400, please let us know... For Low-Res scans, you may want to disable 'Auto-Focus on each Scan' and just keep Auto-focus on 1 Scan, in order to increase speed. I consider than Manual Focus is not usefull, except when 'Auto-Focus' can't find enouch contrast to focus properly, or if you want to de-focus precisely.