Here is the tricky part: The Epson 4990 drivers are not natively supported on macOS Ventura or Windows 11. However, SilverFast solves this by using its own proprietary driver layer.
Furthermore, SilverFast re-engineers how the 4990 handles the bane of all flatbed film scanners: . While the 4990 includes Epson’s "Digital ICE" hardware, the implementation is rudimentary in the native driver. SilverFast’s advanced implementation of iSRD (infrared scratch removal) allows for pixel-level defect correction that is both more aggressive and more selective. More critically, SilverFast introduces SRD (Scratch Removal by Diffusion) and NegaFix . The latter is a revelation for the 4990 user: a database of hundreds of specific negative film stocks (Kodak Portra, Fuji Pro 400H, Ilford HP5) that automatically inverts the orange mask of color negatives with mathematically accurate color profiles. Where Epson Scan often leaves color negatives looking flat and cyan-tinted, SilverFast’s NegaFix produces flesh tones and neutrals that require virtually no post-editing in Photoshop. silverfast epson 4990
The most immediate advantage SilverFast brings to the Epson 4990 is the eradication of the "guess factor" through and HDR (High Dynamic Range) scanning . The 4990’s CCD sensor, while excellent for its time, struggles with dense slide film or underexposed negatives. Standard Epson software forces a single pass, leading to clipped shadows or blown highlights. SilverFast, however, allows the scanner to make two passes over the same film area—one optimized for highlights, one for shadows—and merge them into a 64-bit HDR raw file. For a 4990 user scanning a contrasty Velvia slide, this means recovering the texture of a sunlit cloud while retaining detail in the dark forest below. Without SilverFast, that shadow detail often dissolves into featureless noise; with it, the 4990’s dynamic range effectively doubles. Here is the tricky part: The Epson 4990
Banding (horizontal lines) in scans. Fix: This is the 4990’s known flaw—stiction in the stepper motor or a dirty calibration area. Clean the glass strip under the lid. In SilverFast, run "Calibrate" from the Scanner menu. If that fails, scan at a slightly different DPI (e.g., 2398 instead of 2400). While the 4990 includes Epson’s "Digital ICE" hardware,