There was some discussion in another thread today about Better Light scanning backs. Never having used one of these I looked at the product line and came away confused about how total MP count is determined.

For example, here is the description of the Model 6000E-HS.

"Model 6000E-HS — The economical solution for pro photographers, museums and art repro companies who are easing into digital capture. Native maximum resolution at 100% = 6000 x 8000 pixels. Maximum file size at 100% = 137 MB in 24-bit RGB (274 MB 48-bit). Price: $9,495 with 2-year warranty."

Now, if you download the .pdf for product information the Model 6000E-HS is said to give a file size of 144 MP. The Model 6K-HS, which is also listed as 6000X8000 pixels, is said to give a file size of 216 MP.

Question, how do you get 144 MP and 216 MP from a scan of 6000X8000 pixels? I would have calculated this as 48 MP for both backs. Are the higher figures interpolated resolution?

Sandy King