PNG is the lossless compressed image format of the web, and converting Olympus ORF RAW files to PNG preserves every pixel of the demosaiced image without any compression artifacts. Olympus OM-D and PEN cameras produce ORF files with 12-bit Micro Four Thirds sensor data that, when rendered to PNG, gives you a clean, artifact-free image suitable for editing, compositing, and any workflow where JPEG compression is unacceptable.

Unlike BMP, PNG uses lossless compression (deflate algorithm) to reduce file sizes by 30-60% without altering any pixel values. This makes PNG the practical choice when you need uncompromised quality from your Olympus RAW conversions in a format that every modern application, browser, and operating system supports natively.

PNG is the standard lossless format for digital workflows. Graphic designers, web developers, and digital artists prefer PNG because it preserves sharp edges, fine text overlays, and subtle color transitions without JPEG's DCT artifacts. If you are compositing Olympus photographs with text, graphics, or transparent layers, PNG as the base image ensures no compression noise interferes with your work.

For web use, PNG excels when image crispness matters more than file size. Product photography shot on Olympus cameras, technical diagrams with photographic elements, and images with text overlays all benefit from PNG's lossless compression. Additionally, PNG supports alpha transparency, which JPEG does not — relevant if you need to cut out subjects from your Olympus photos for compositing.

The ORF sensor data is demosaiced from its Bayer pattern into full-color RGB, white balance is applied from camera metadata, and the result is compressed using PNG's lossless deflate algorithm. The output is 8-bit per channel (24-bit RGB) or 16-bit per channel if high-depth output is selected. A 20 MP Olympus image produces a PNG of approximately 25-40 MB at 8-bit depth, depending on scene complexity. PNG files with large areas of similar color compress more efficiently than highly detailed scenes.

A 20 MP Olympus image at high-quality JPEG is typically 3-6 MB. The same image as 8-bit PNG is 25-40 MB. PNG files are significantly larger but preserve every pixel without compression artifacts.

Standard 8-bit PNG cannot — it reduces to 8 bits per channel. However, 16-bit PNG preserves more than the 12-bit ORF depth, making it suitable for archival and editing workflows where tonal range matters.

Both are lossless. PNG has universal browser and application support plus built-in compression. TIFF supports more color spaces and is traditional in print workflows. For web and general use, PNG is more practical.

Yes, PNG at full resolution provides print-quality images. However, print services more commonly accept JPEG or TIFF. Check your printer's accepted formats — most accept PNG without issue.

PNG supports metadata through text chunks. Camera model, exposure settings, and other EXIF data from the ORF file are embedded in the PNG output.

The original ORF has no transparency — it is a sensor capture. The PNG output will have an opaque RGB image. If you need transparency, you would need to add an alpha channel in a subsequent editing step.

Device	ORF	PNG
Windows PC	Partial	Native
macOS	Partial	Native
iPhone/iPad	Partial	Native
Android	Partial	Native
Linux	Partial	Native
Web Browser	No	Native

Ominaisuus	ORF	PNG
Koko nimi	Olympus RAW Format	Portable Network Graphics
Tiedostopääte	.orf	.png
Paras käyttökohde	Olympus cameras	Lossless quality

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