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BMP vs SR2

BMP vs SR2

A detailed comparison of BMP Image and Sony RAW SR2 — file size, quality, compatibility, and which format to choose for your workflow.

Convert SR2 → BMP
BMP

BMP Image

Raster & Vector Images

BMP is an uncompressed raster image format native to Windows. Files are large but preserve exact pixel data with no compression artifacts. Rarely used on the web due to file size.

About BMP files
SR2

Sony RAW SR2

Raster & Vector Images

SR2 is an older Sony RAW format used in some Sony Alpha cameras. Newer Sony cameras use ARW instead.

About SR2 files

Strengths Comparison

BMP Strengths

  • Dead-simple format — trivially easy to read and write.
  • Lossless and uncompressed — perfect bit-exact pixel storage.
  • Universally supported in Windows applications since 1985.
  • Supports 1, 4, 8, 16, 24, and 32-bit color depths.

SR2 Strengths

  • Full Sony Alpha early-era sensor data preserved.
  • Supported by major raw processors.
  • Metadata includes Konica Minolta pre-Sony era compatibility.

Limitations

BMP Limitations

  • Enormous file sizes — no meaningful compression in typical use.
  • Not a web format — browsers support it but nobody serves BMPs over HTTP.
  • No metadata support (no EXIF, no ICC profile in practice).
  • Multiple header versions mean "a BMP" is ambiguous — parsers must handle several variants.

SR2 Limitations

  • Transitional format — limited to 2006-2008 bodies.
  • Superseded by ARW.
  • Proprietary with no public spec.
  • Essentially legacy — no new content.

Technical Specifications

Specification BMP SR2
MIME type image/bmp image/x-sony-sr2
Extensions .bmp, .dib —
Compression None (typical); RLE 4/8 bit (rare) —
Color depths 1, 4, 8, 16, 24, 32 bits per pixel —
Byte order Little-endian —
Extension — .sr2
Container — TIFF/EP with Sony MakerNote
Successor — .arw (2008+)
Ancestor — .mrw (Konica Minolta)

Typical File Sizes

BMP

  • Small icon (32×32) 4 KB
  • Screenshot (1920×1080) ~6 MB
  • 4K image (3840×2160) ~25 MB
  • Scanned A4 at 300 dpi ~25 MB

SR2

  • 10 MP SR2 (Alpha 100) 12-18 MB
  • 12 MP SR2 (Alpha 700) 15-22 MB

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Frequently Asked Questions

BMP (Bitmap) is a raster image format developed by Microsoft for Windows. It stores images with no compression by default, resulting in large file sizes but pixel-perfect quality. It has been part of Windows since version 1.0.

BMP (Bitmap) is a raster image formato developed by Microsoft para Windows. It stores images com no compressão by default, resulting in large tamanho do arquivos mas pixel-perfect quality. It has been part of Windows since version 1.0.

BMP files open in Windows Paint, Photos, macOS Preview, GIMP, Photoshop, and virtually any image viewer. All Windows applications support BMP natively.

BMP arquivos abrir in Windows Paint, Photos, macOS Preview, GIMP, Photoshop, e virtually any image viewer. All Windows aplicativos support BMP natively.

PNG is better than BMP in almost every scenario since it provides lossless compression (smaller files), transparency support, and wider cross-platform use. BMP is mainly relevant for legacy Windows applications.

PNG is melhor que BMP in almost every scenario since it fornece sem perdas compressão (smaller files), transparência support, e wider cross-platform use. BMP is mainly relevant para legacy Windows aplicativos.