What is MOS?

Mamiya MOS (Leaf MOS) is a raw sensor data format from Mamiya/Leaf digital camera backs, used in professional studio photography.

What is BPG?

Better Portable Graphics (BPG) is a modern image format based on HEVC video compression, offering excellent compression efficiency.

When Should You Use MOS vs BPG?

MOS vs BPG: Key Differences

• •The core technical difference: MOS relies on lossless compression whereas BPG uses lossy compression.
• •Converting from MOS to BPG changes compression type: lossy source becomes smaller but with some quality tradeoff.
• •How transparency is handled: BPG does not support alpha channels — transparent areas in the source will become opaque.
• •File sizes: MOS files typically range 30-70MB per image and BPG files 30-50% smaller than JPEG at same quality.
• •MOS is optimized for mamiya camera raw processing while BPG is designed for web images with superior compression — choose based on your specific workflow needs

Advantages of MOS

• ✓MOS uses lossless compression tailored for Mamiya camera raw processing.
• ✓MOS is supported natively on virtually every device, browser, and operating system.
• ✓MOS files are bit-for-bit perfect, preserving every pixel and sample for professional work.
• ✓MOS integrates seamlessly with all major creative tools and workflows.

Advantages of BPG

• ✓At its core, BPG relies on lossy encoding — a design choice that makes it perfect for Web images with superior compression.
• ✓You won't run into compatibility issues with BPG — it's a universal standard across platforms.
• ✓File size management with BPG: aggressive compression with minimal visible quality loss.
• ✓Every major application in the Web images with superior compression space supports BPG natively.

Common Use Cases for MOS to BPG Conversion

• Digital photography and editing
• Graphic design projects
• E-commerce product images
• Email marketing campaigns
• Presentation graphics
• Blog and article illustrations

Industry Applications

Best Practices for MOS to BPG Conversion

• →When converting MOS to BPG, check whether BPG supports transparency — if not, your transparent areas will be filled with a solid color
• →Use BPG for maximum quality archival and MOS for lossless workflows
• →Optimize images for web to reduce page load times — tools like our converter let you adjust quality settings before conversion
• →Maintain original aspect ratio to avoid distortion during conversion
• →Always keep a backup of your original files before converting
• →Choose the appropriate quality settings for your specific use case

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Troubleshooting MOS to BPG Conversion

• !BPG shows visible compression artifacts → lower the compression level or switch to a lossless variant
• !The converted BPG image looks washed out → the source MOS likely uses a wider color space than BPG supports
• !BPG file is much larger than expected → check if the conversion preserved an unnecessarily high resolution
• !Text in the converted BPG looks fuzzy → text-heavy images benefit from higher quality settings or a different output format

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