Some weeks ago I went to the usual pro lab and asked a print (30 x 30 cm ) from a slide. The print came out pretty good but with some spot/dust on it. Yesterday I was again at that lab and by talking with the guy that do the scan for me I asked to check if the file of the scan of that slide was already available. He was not sure it was available because I asked a direct print and was not made by him. With his surprise the file was there in the server so he saved a copy for me. Now come to the point: 1) when a direct print is asked the slide is scanned right? Is this process different (different machine?) from a pro (imacon o drum) scan? 2) the file was a .bmp, ( 3.035 X 3.035 pixel at bit per channel)is there a reason why it is saved as .bmp? It is an automatic choose of the machine? 3) I want to use te file to clean the image from spot/dust, it is suitable for this purpose or the .bmp file has some weak point compared to .tiff. 4) Do you recommend to save it as a .tiff or leave it in .bmp? Thank you in advance for your help.