Originally Posted by
sanking
Asher,
First, there is indeed a world of difference between a high end flatbed like the Scitex EverSmart and the Epson and Microtek consumer flatbeds. For example, the Epson 4990 is advertised to be 4800 spi resolution, but you will be very lucky to get effective resolution of 2000 ppi, even when the position of the material to be scanned is placed the optimal position relative to the lens. By contrast, my EverSmart Pro, which has optical resolution of 3175 spi, will actually deliver over 3100 spi in effective resolution.
However, if you are scanning B&W film the effective resolution of a tabloid scanner like the Microtek 9800 or 1000, or the Epson 1600 and 10000, is more than enough for B&W ULF negatives, and assuming you don't overexpose and/or overdevelop, the dynamic range of these scanners should be sufficient. Problem is that physical characteristics of the Microtek 9800 and 10000 are not good for stitch scanning ULF negatives since these scanners have a lip above the surface of the glass. Epson 1600 and 10000 is better for this, but for the same price you may be able to find a used high end flatbed. That is the option I considered for a long time, and I eventually decided that the best choice for me for LF and ULF negatives, was a high end flatbed.
Finally, there are no special needs of pyro stained negatives that make high end flatbeds necessary. I have made many beautiful carbon and pt./pd. prints from PMK and Pyrocat-HD negatives scanned on Epson 4870 and 4990. However, it is important to expose and develop film so that you do not exceed, or even approach for that matter, the Dmax limit of the scanner. If you do, there will be no way to capture the detail in the highlights with consumer flatbed.
Sandy
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