Merge ERF to PDF

How to Merge ERF Photos to a PDF Online

1. Upload Your ERF Files: Drag and drop or click "+ Add Files" to select multiple Epson RAW frames from an R-D1, R-D1s, or R-D1x. Reorder pages by dragging the thumbnails so the PDF reads in shooting sequence.
2. Pick Combine Mode: Default is "Single PDF" — every ERF becomes one page in one document. Switch to "Individual PDFs" if you need one PDF per file (useful when emailing single shots or feeding a per-file workflow).
3. Set Page Layout, Paper Size, Placement and Margin (Optional): Choose Portrait or Landscape; pick a Paper size (Original, Letter, A4, Legal, Tabloid, Ledger, A3, Executive, Arch A/B, ISO B4/B5, Screen size). Pick Image placement — Contained (fits within margins, default) or Cover (fills the page edge to edge). Pick Image alignment — Top, Center, or Bottom. Set Margin to No margin, Narrow (default), Moderate, Normal, or Large.
4. Tune Image Compression and Merge: Drag Image Quality (%) between 1–100 (default 75) and pick a Compression Type — Screen (smallest), Ebook, Default, Prepress, or Printer (highest). Set Image Transparency to Unchanged or Removed. Click "Merge" — files process in your browser session, no sign-up, no watermark.

Why Merge ERF to PDF?

ERF is Epson's proprietary RAW container introduced with the Epson R-D1 rangefinder in March 2004 — the world's first digital rangefinder camera — and continued through the R-D1s (2006) and the Japan-only R-D1x/R-D1xG (2009, discontinued March 2014). Every ERF is built on the TIFF/EP foundation wrapping uncompressed sensor data from the camera's 6.1-megapixel APS-C CCD (Sony ICX413AQ, 23.7 × 15.6 mm). That's great for archival fidelity, terrible for sharing — without Epson PhotoRAW, Adobe Camera Raw, Lightroom, or Capture One installed, recipients see a blank thumbnail or a grey placeholder. Merging to PDF renders each frame to a portable page that opens in any browser, on iOS, Android, or print kiosks.

• Archive a 20-year-old R-D1 shoot — the original PhotoRAW utility shipped on a CD-ROM and is no longer supported on Apple Silicon or Windows 11; baking the ERFs into a PDF preserves the visible image even as RAW-decoder support fades.
• Send a contact sheet to a film-look client — Landscape A4 with Contained placement and Narrow margin lays four R-D1 frames per page at a readable size for review.
• Print-ready portfolio — Pick Letter or A4 with Cover placement and Prepress compression so the lab-bound PDF embeds full-quality JPEG previews (≈20–30 MB for a 12-page set).
• Email-friendly proofs — A 12-image Screen-compression PDF lands well under the 25 MB Gmail attachment cap; single ERFs from an R-D1s typically run 8–10 MB raw, far too large to send unconverted.
• Submit to a juried print show — Most print competitions reject RAW; a single PDF with Prepress compression satisfies "PDF only, single file under 50 MB" rules.
• Long-term family-archive backup — PDFs are PDF/A-friendly, indexable, and supported by every cloud-photo service; ERFs get filtered out of Google Photos and iCloud Photos entirely.

ERF vs Common Photo Formats

Compression Type Quick Guide

Frequently Asked Questions

Why can't I open my ERF files on a modern Mac or Windows 11 PC?

Epson's original PhotoRAW software was 32-bit and is not maintained — it does not run on macOS Catalina or later (no 32-bit support since 2019) or on current Windows on ARM builds. Adobe Camera Raw still includes Epson R-D1 / R-D1s decoders (added back in Camera Raw 2.3 with Photoshop CS), and so do Lightroom Classic, darktable, and RawTherapee. If none of those are installed, the operating-system thumbnail provider has no way to decode the TIFF/EP-wrapped sensor data, so Finder or Explorer shows a generic icon. Merging to PDF renders the embedded preview into a standalone document anyone can open.

Will the merged PDF preserve the full RAW dynamic range of my R-D1 ERF?

No — and that's expected. PDF embeds rasterized images, typically 8-bit JPEG or DCT-compressed bitmaps. The R-D1's 12-bit-per-channel CCD readout gets tone-mapped down to 8-bit during the embed step, so highlight and shadow latitude is reduced versus the RAW. If you need to keep editable RAW data, convert the ERFs to DNG via Adobe DNG Converter instead and archive those alongside the PDF. The PDF is for sharing and viewing, not for re-editing.

Should I pick Cover or Contained for image placement?

Pick Contained (default) when you want the entire ERF frame visible with margins around it — that's the right choice for contact sheets, archival pages, and any time you care about composition. Pick Cover when you want the image to fill the entire page edge-to-edge, which crops to the page's aspect ratio. The R-D1 sensor is 3:2 (3008 × 2000); on Letter or A4 paper (~1.29:1), Cover will trim a noticeable amount off the long edge, so Contained is the safer default for portraits and landscapes you don't want cropped.

How do I fit several ERF photos on one PDF page?

The merge tool places one ERF per page. To get multiple frames per page, first convert each ERF to JPEG with ERF to JPG, then arrange them externally (Photoshop, Affinity, GIMP, or a contact-sheet utility) and export to PDF. Alternatively, use Landscape orientation with Cover placement and crop the ERFs in advance to a 4:3 strip — that gets two side-by-side frames per page when laid out manually before upload.

What's the difference between Single PDF and Individual PDFs?

Single PDF combines every uploaded ERF into one multi-page document — pick this for a portfolio, contact sheet, or chronological archive. Individual PDFs produces one PDF per ERF and zips the results — pick this when you need to email frames separately, attach them to different records, or feed them into a per-file batch script. The image quality, paper size, and compression settings apply to both modes.

Why is my output PDF much larger than the sum of the ERFs?

If you picked Prepress or Printer compression with a high Image Quality (%), each page embeds a near-uncompressed JPEG at the paper's pixel density. A 12-page Prepress PDF can easily reach 40–50 MB even though the source ERFs total ~100 MB raw, because the embedded previews are full-resolution at 300 DPI with an embedded ICC color profile. To shrink the result, switch Compression Type to Screen or Ebook, drop Image Quality to 60–75, or run the result through Compress PDF afterward.

Will image rotation from the ERF's EXIF orientation tag carry through?

Yes. The merge step reads the camera-rotation tag the R-D1 wrote into the ERF (portrait shots taken with the camera vertical) and rotates the embedded preview accordingly before placing it on the page. If a frame still appears sideways in the PDF, the EXIF tag was missing or incorrect — re-shoot or fix the orientation in a RAW editor (Lightroom, darktable) and re-export, or rotate the underlying image and re-upload.

Can I merge ERFs from other Epson devices, like Epson scanners?

ERF in this tool refers strictly to the R-D1-family camera RAW format (TIFF/EP container, Sony APS-C CCD data). Epson flatbed scanners save to TIFF, JPEG, or PDF directly via Epson Scan — they don't write ERF. If you have a .erf file from a non-camera Epson source, it's likely a different format reusing the extension (some Epson printer firmware utilities, for example, used .erf for printer-resource files); those won't open as images here. Verify the source: a true camera ERF starts with the standard TIFF byte-order marker (II*\0 or MM\0*).

What page sizes work best for printing R-D1 photos?

The R-D1's native frame is 3008 × 2000 pixels at 3:2 — that's a perfect match for traditional print sizes like 4×6 or 8×12. For PDF output, A4 (8.27×11.69 in) and Letter (8.5×11 in) both fit a single 3:2 frame comfortably with 1-inch borders. For landscape contact sheets pick Tabloid (11×17 in) or A3 (11.7×16.5 in) and use Contained placement so the prints' aspect ratio is preserved. Arch A/B are useful for architectural or large-format presentation; Screen size matches a 16:9 display for on-screen review, not paper.

Is there a file-size limit per ERF or per merged PDF?

xconvert processes files in your browser session, so the practical limit depends on your device's available memory rather than a hard server cap. A typical R-D1 ERF is 8–10 MB; 50–100 ERFs (≈500 MB total) will merge fine on a modern laptop with 8 GB+ RAM. If your browser tab runs out of memory on a very large batch, split the upload into two or three smaller merges and combine the resulting PDFs afterward.