Looking for an SRDx Alternative?
If you’ve searched for a way to clean dust from film scans without an infrared scanner, you’ve probably found SRDx — the “Smart Removal of Defects” Photoshop plug-in from LaserSoft Imaging, the developers of SilverFast. It’s a capable tool, and it earned its reputation honestly: adjustable automatic detection, careful manual controls, and correction that preserves the sharpness of the original.
But SRDx lives inside Photoshop and works one image at a time. If your problem is a folder of dusty scans rather than a single image, there’s a faster way. This article compares the two fairly — they solve the same problem for quite different workflows.
The Infrared Gap
Hardware dust removal (Digital ICE, FARE) uses an infrared channel on the scanner to find dust. That means it:
- Only works on dedicated film scanners with an IR channel — never on DSLR or mirrorless camera scans
- Doesn’t work on Kodachrome, which confuses the infrared channel
- Adds significant time to every scan
Software tools exist to fill this gap. SRDx is one. DustMagic is another — built for a different workflow.
What SRDx Actually Is
SRDx is a plug-in for Photoshop and Photoshop Elements (officially supported: Photoshop CS5.5 through CC 2023 and Elements 13 through 2023, 64-bit, on macOS 10.10+ and Windows 7+). It combines an adjustable automatic detection of dust and scratches with manual fine-tuning tools — a defect marker to flag what the detection missed and a rubber tool with content protection to exclude areas you want left alone. On Mac it adds its own mask tool; on Windows you use Photoshop’s masks and layers to control where it applies.
Two things SRDx does well: it corrects without blur, so the sharpness of the original is preserved, and it uses your graphics card (OpenCL) to keep corrections fast. There’s a 30-day demo with all features available, and activation requires an internet connection.
It’s a precision instrument — you open an image in Photoshop, run the plug-in, tune the detection, and fix that image properly.
What DustMagic Does Differently
DustMagic is a standalone desktop app for macOS and Windows (it also installs as a Lightroom Classic plugin). Instead of correcting one open image, you point it at a folder of scans, pick a preset for slides or negatives, and let dark-bright dust detection work through the batch — around 100 images in roughly 3 minutes, though actual speed depends on your processor, image size, and settings.
Every image gets a detection mask you can inspect in-app — overlay, split view, Mask Only, zoom up to 20× — so you can verify exactly which pixels were modified before trusting a batch. The detector is film-aware and grain-preserving: it removes surface contamination, not film texture. For the odd stubborn spot, the Smart Brush Tool handles single-click touch-ups without leaving the app. All processing happens offline — your images never leave your computer.
SRDx vs DustMagic at a Glance
| SRDx | DustMagic | |
|---|---|---|
| Runs as | Photoshop / Photoshop Elements plug-in | Standalone app (macOS + Windows), or Lightroom Classic plugin |
| Requires Photoshop | Yes (CS5.5–CC 2023, Elements 13–2023) | No |
| Workflow | One image at a time | Batch — ~100 images in about 3 minutes* |
| Film types | Colour, black & white, and Kodachrome | Positive slides, colour negatives, and Kodachrome |
| Detection | Adjustable automatic detection + manual defect marker | Dark-bright dust detection with slide/negative presets |
| Verification | Preview window | In-app detection masks: overlay, split view, Mask Only, 20× zoom |
| Touch-ups | Defect marker + rubber tool with content protection | Smart Brush Tool |
| Sharpness & grain | No-blur correction, preserves sharpness | Grain-preserving — removes dust, not film texture |
| Internet | Required for activation | Fully offline — images never leave your computer |
| Formats | Whatever Photoshop opens | JPEG, TIFF (8-bit and 16-bit) |
| Trial | 30-day demo, all features | Unlimited images, watermarked output |
*Performance depends on processor, image size, and detection settings.
Where DustMagic Fits
DustMagic is built for volume: colour film and Kodachrome scanned in batches — especially camera scanning, where you have no infrared option at all. Instead of spotting each image in an editor, you run the folder, verify with the masks, and touch up the rare miss with the Smart Brush Tool. If most of your dust problem is measured in folders rather than images, that’s the job DustMagic was built for.
Try It on Your Own Scans
The free trial processes unlimited images — full batches included — with a watermark on the output. If you like the results, a 12-month licence ($59) removes the watermark.