4000PPI的扫描仪可能早已有之，但那都是滚筒扫描仪。有些极昂贵的平板扫描仪也有高达近4000PPI的，但那些扫描仪都是多用途的，且价格极高，投资既不值得，它在扫描底片或正片时的清晰度又与滚筒扫描仪差之甚远，不为专业人员看好。所以算不上是专业人员的一种选择。于是Micro 4000 PPI scanner may have long been, but it is a roller scanner. Some very expensive flatbed scanners also have up to nearly 4000PPI, but those scanners are versatile, and the price is high, the investment is neither worth it, the clarity of the negatives or negatives in scanning negatives and drum scanners Far, not optimistic about professionals. So I am not a professional choice. So Micro