Film comparison
CatLABS CatLABS X Film 320 (120/Sheet) vs Ilford FP4 Plus
- CatLABS X Film 320 (120/Sheet) is 1.3 stops faster (ISO 320 vs 125).
Side by side
| CatLABS X Film 320 (120/Sheet) | FP4 Plus | |
|---|---|---|
| Manufacturer | CatLABS | Ilford |
| Type | Black & white | Black & white |
| Box speed | ISO 320 | ISO 125 |
| Process | B&W | B&W |
| Formats | 120, 4x5 | 35mm, 120, 4x5, 8x10 |
| Grain | Fine | Fine |
| Contrast | Medium | Medium |
| Latitude | Good | Good |
| Saturation | — | — |
| Price, 35mm | — | about £8.00 |
| Price, 120 | about £11.00 | about £7.00 |
| Availability | Current | Current |
Rows that differ are in bold. Prices are typical UK prices and change often.
How they look
- CatLABS X Film 320 (120/Sheet)
- Different emulsion from the 35mm version (which is Kodak Double-X). Origin unclear - likely aerographic stock with finer grain.
- FP4 Plus
- Often considered a benchmark for medium speed B&W. Notable sharpness and fine grain. Well-suited for high-quality enlargements.
Which suits what
Better pick: CatLABS X Film 320 (120/Sheet)
Medium format, Large format, Fine detail
Both work well
—
Better pick: FP4 Plus
Landscapes, Studio portraits, Bright conditions
Long exposures (reciprocity)
| Metered | CatLABS X Film 320 (120/Sheet) | FP4 Plus |
|---|---|---|
| 1s | No data | 1s |
| 10s | No data | 18s |
| 30s | No data | 1m 13s |
| 2m | No data | 6m 57s |
Corrected exposure from each film’s published reciprocity data. Reciprocity calculator
Developing both
Developers with published times for both films: