Q-factor and Max Dpi 35mm Slides

[seawolf]

I am confused by Q-factor when scanning 35mm slides. I have a Nikon Super Coolscan 5000 with a max optical scan resolution of 4000 dpi. I am scanning my slide collection for multipurpose archive. I want to scan at the max dpi without exceeding the 'True' (interpolation) resolution of the scanner. I print to a Epson 2400r inkjet printer, but also my slides are sometimes published in magazines. What Q-Factor should I use?

If I set a Q-Factor of 1, the max scan resolution is shown as 4000 dpi. If I set a Q-factor of 2 the max scan resolution is 8000 dpi and this would be beyond the optical cabablities of my scanner. Can somone please help me understand what Q-Factor would be best for my purposes. Again, I want the highest quality as a archive scan, I will just this 'digital negative' for individual purposes such as: printing to epson 2400 inkjet, magazine submission. What Q-factor should I use?

Thank you.

[RAG]

seawolf,

The Q-Factor may be set independently of the output resolution. In other words, you may set the Q-Factor to 2 and then change the output resolution to 4000.

If you have not purchased and read "SilverFast the Official Guide" I recommend it for you. On page 11, among others, you will find the following information. "SilverFast's Resolution Terminology"

SilverFast uses dpi to refer to pixels per inch.

So a 4000 dpi scan will result in the creation of a 4000 pixel per inch (ppi) image.

SilverFast uses printing resolution (lpi) and a quality factor to determine the final input resolution.

So an lpi of 2000 and a quality factor of 2 will yield a final scanned image resolution of 4000 (lpi X 2 = 4000 ppi).

[seawolf]

You are missing the point of my question. Let me try and ask it in a different way. What is the difference between:

Q-factor of 2 and Screen (lpi) of 2000 which results in 4000 ppi image
VS.
Q-factor of 1 and Screen (lpi) of 4000 which results in a 4000 ppi image

Ok? My concerns are around the fact that if I set Q-Factor 2, Screen (lpi) 4000, I get a 8000 ppi image that is far above the 4000 optical capablities of my scanner (yes scaling is at 100%).

I am trying to understand what should I use when scanning my 35mm slides for a digital negative archive (I want the best quality possible). My needs are to use print to an Epson Inkjet as well as digital submission to magazines (I will downsize the original scan appropratley).