1. Lightroom Mobile:
Lightroom Mobile is arguably the best and most comprehensive option for working with DNG files on your iPhone. It's built for raw image processing and offers a robust editing experience.
* Importing DNG Files:
* Direct from Camera (Using a Card Reader): The most reliable method is to use a Lightning to SD Card Camera Reader or a Lightning to USB Camera Adapter (for cameras using USB).
1. Connect the card reader or USB adapter to your iPhone.
2. Insert your SD card (containing the DNG files) into the card reader or connect your camera via USB.
3. The Photos app should automatically open, or you may see an import option.
4. Import the DNG files to your iPhone's Camera Roll.
5. Open Lightroom Mobile.
6. Tap the "+" button in the lower-right corner (or the "Add Photos" option).
7. Select the DNG files you imported from your Camera Roll. Lightroom Mobile will automatically detect and import them as RAW files.
* AirDrop from another device (Mac/iPad): If you have DNGs on another Apple device, AirDrop is a seamless way to transfer them.
1. On your Mac/iPad, locate the DNG files.
2. Right-click (or long-press) on the file(s) and choose "Share".
3. Select "AirDrop" from the sharing options.
4. Choose your iPhone from the list of available devices.
5. On your iPhone, accept the AirDrop transfer. The DNG files will be saved to your Camera Roll (usually).
6. Follow steps 5-7 above to import into Lightroom Mobile.
* Cloud Services (Dropbox, Google Drive, iCloud Drive): If your DNG files are stored in a cloud service, you can download them to your iPhone and then import them into Lightroom Mobile.
1. Open your cloud service app (Dropbox, Google Drive, etc.).
2. Locate the DNG files.
3. Download the DNG files to your iPhone. Save them to "Files" or to the "Camera Roll".
4. Follow steps 5-7 above to import into Lightroom Mobile.
* Editing DNG Files in Lightroom Mobile:
* Once imported, your DNG files will appear in your Lightroom Mobile library.
* Tap on a DNG file to open it in the Edit view.
* Use the various editing tools (Exposure, Contrast, Highlights, Shadows, White Balance, Color Grading, etc.) to adjust your image.
* Lightroom Mobile provides non-destructive editing, meaning your original DNG file remains untouched. All edits are saved as instructions in the Lightroom catalog.
* Exporting from Lightroom Mobile:
* Tap the Share icon (usually three dots or an arrow pointing up).
* Choose your desired export settings (file type, size, quality, watermark).
* You can export as JPEG, TIFF, or back as DNG. Choose DNG to retain the RAW information.
* Save the exported file to your Camera Roll, Files app, or share it directly to social media.
2. RAW by FiftyThree (no longer actively developed, but still functional for some):
RAW was a dedicated app for editing raw images on iOS. While it's no longer actively developed and has some limitations, you might be able to use it if you already have it installed. Important note: RAW may not support newer camera models or DNG versions.
* Importing DNG Files: The process is similar to Lightroom Mobile, using a card reader, AirDrop, or cloud storage. Import the DNG files to your iPhone's Camera Roll.
* Opening DNG Files in RAW: RAW usually detects RAW files in your Camera Roll automatically. If not, you might have to manually select the DNG from your Camera Roll within the RAW app.
* Editing: RAW offers a streamlined set of editing tools.
* Exporting: RAW allows you to export your edited images as JPEG or TIFF. It typically doesn't export back as DNG.
Limitations of RAW:
* Lack of Updates: The app is no longer updated, meaning it may not support newer cameras or DNG formats.
* Limited Features: Compared to Lightroom Mobile, RAW has fewer editing features.
* Potential Compatibility Issues: RAW might not work flawlessly on the latest iOS versions.
3. ProCam 4 (and later versions):
ProCam is a powerful camera app that can also *capture* DNG files. It *doesn't* typically handle editing imported DNG files effectively like Lightroom. You'd primarily use it for shooting in DNG and then transfer to a different app for editing.
* Shooting DNG with ProCam:
1. Open ProCam.
2. Ensure the shooting mode is set to capture RAW (DNG). This is usually found in the ProCam settings or camera interface.
3. Take your photo. ProCam will save both a JPEG and a DNG file (or just the DNG, depending on your settings).
* Editing DNG files *shot* with ProCam in ProCam (Limited):
* ProCam does offer *basic* editing tools, but it's not designed for in-depth RAW processing. You can adjust exposure, contrast, white balance, etc. However, the editing capabilities are far less sophisticated than Lightroom or even RAW.
* Recommendation: ProCam is best for *capturing* DNG files. Transfer them to Lightroom Mobile for proper editing.
* Importing *external* DNG files into ProCam (Generally Not Recommended):
* While you *might* be able to import external DNG files into ProCam (e.g., from your Camera Roll), ProCam is primarily a camera app. It's not optimized for editing externally sourced DNG files.
* Importing external DNGs into ProCam *usually* results in the app displaying the embedded JPEG preview of the DNG rather than the actual raw data, meaning you're not editing the RAW file at all.
Summary Table:
| Feature | Lightroom Mobile | RAW (FiftyThree) | ProCam (For DNG) |
|-------------------|--------------------|-------------------|-------------------|
| Main Purpose | RAW Editing | RAW Editing | Camera / DNG Capture |
| DNG Editing | Excellent | Good | Limited |
| DNG Capture | No | No | Yes |
| Modern Support | Yes | No (Discontinued) | Yes |
| Export Options | DNG, JPEG, TIFF | JPEG, TIFF | JPEG, DNG (from capture) |
Key Considerations:
* Lightroom Mobile is the Best Option: For serious DNG editing on your iPhone, Lightroom Mobile is the clear winner. It offers the most comprehensive features, active development, and best RAW processing capabilities.
* Camera Connection Kit: The Lightning to SD Card Camera Reader or Lightning to USB Camera Adapter is highly recommended for transferring DNG files directly from your camera's storage.
* Storage Space: DNG files are significantly larger than JPEGs. Ensure your iPhone has enough storage space. Consider using a cloud storage service for archiving.
* Workflow: Plan your workflow. Do you want to shoot in DNG with ProCam and then edit in Lightroom Mobile? Or will you be transferring DNG files from another camera to your iPhone for editing? Knowing your workflow will help you choose the right tools and processes.
* Adobe Creative Cloud Subscription (for Lightroom Mobile): While Lightroom Mobile has a free version, a paid Adobe Creative Cloud Photography plan unlocks its full potential, including syncing with Lightroom on desktop and access to advanced features. The free version has many of the core RAW editing features, though.
By following these steps and understanding the strengths and limitations of each app, you can effectively use DNG files on your iPhone. Start with Lightroom Mobile; it's the most versatile and powerful solution for serious mobile photography.