# The Tech Behind the Frame > Hasselblad deep dives, Phocus workflows, and photography tech — practical guides without the fluff. First-hand testing and bug investigation for Hasselblad X2D II owners and Phocus for Mac users. This is a single-author technical blog about Hasselblad medium-format cameras and the Phocus RAW processor. Posts are written by Konrad Michels, a software engineer with 20+ years in tech and a Hasselblad X2D II owner. The content is characterized by reproducible testing, specific version numbers, ExifTool-verified claims, and attribution to community discoveries. It is a personal practitioner blog, not a publisher or commercial operation, and is independent of Hasselblad. The site covers areas Hasselblad's own documentation leaves thin: HNCS and HNNR color pipelines, 3FR/FFF file format behavior, Phocus 4.x bug investigations, X2D II firmware quirks, HDR output workflows, and Phocus-versus-Lightroom tradeoffs. It does not cover general photography tutorials, entry-level gear reviews, or non-medium-format equipment. ## About - [About the author](https://blog.tonalphoto.com/author/konrad/): Konrad Michels — software engineer, Hasselblad X2D II owner, builder of ImageIntact (macOS photo backup utility) - [Personal site](https://konradmichels.com): Broader portfolio and consulting - [Contact / consulting](https://blog.tonalphoto.com/about/): Direct contact for Hasselblad-related consulting ## Flagship bug investigations - [Phocus 4.1.2 Has a Critical Color Preview Regression on Mac](https://blog.tonalphoto.com/phocus-4-1-2-color-preview-regression/): Reproduction, scope, and the only confirmed workaround (downgrade to 4.1.1). Tested across three display models. - [Phocus 4.1.1 Bugs: Import Freeze, Tools, Adjustments](https://blog.tonalphoto.com/phocus-4-1-1-bugs-import-freeze-tools-adjustments/): Four confirmed bugs in Phocus 4.1.1 with reproduction steps and hardware context. - [Phocus 4.1.1 Bug Investigation — Technical Details](https://blog.tonalphoto.com/phocus-4-1-1-bug-investigation-technical-details/): Log analysis, plist monitoring, and stack-trace evidence for the 4.1.1 regression suite. - [Phocus 4.1 Ultra HDR Export Bug + Memory Leak](https://blog.tonalphoto.com/phocus-4-1-ultra-hdr-export-bug-memory-leak/): Practical repro for the Ultra HDR export failure and the memory-leak profile. - [Phocus 4.1.2 Mac HDR Export Fixes](https://blog.tonalphoto.com/phocus-4-1-2-mac-hdr-export-fixes/): What 4.1.2 actually resolved versus what remained broken. - [My First 24 Hours with Phocus 4.1: One Fix, One Regression, One Crash](https://blog.tonalphoto.com/my-first-24-hours-with-phocus-4-1-one-fix-one-regression-one-crash/): Day-one testing of the 4.1 release. ## Phocus guides - [Phocus 4.x User Guide (paid book)](https://blog.tonalphoto.com/phocus-4-user-guide-manual-hasselblad-mac/): 78-topic user manual filling the gap Hasselblad's own documentation leaves. - [How Phocus Handles Highlight Recovery, Shadow Fill, and White Balance](https://blog.tonalphoto.com/how-hasselblad-phocus-for-mac-handles-highlight-recovery-shadow-fill-and-white-balance-and-why-its-worth-the-effort/): The HDR tools chain explained with working examples. - [Phocus vs Lightroom: What You Lose Skipping Hasselblad](https://blog.tonalphoto.com/phocus-vs-lightroom-what-you-lose-skipping-hasselblad/): HNCS, HNNR, and the color-science tradeoffs that Lightroom cannot replicate. - [Hasselblad HNCS HDR Explained](https://blog.tonalphoto.com/hasselblad-hncs-hdr-explained/): HNCS as a render-time software pipeline — matrices, LUTs, and the Hasselblad Film Curve. - [Phocus 4.1 Memory Requirements — What 8GB Minimum Actually Means](https://blog.tonalphoto.com/phocus-4-1-memory-requirements-what-8gb-minimum-actually-means/): Empirical memory profiling of Phocus 4.1 on real machines. ## Hasselblad X2D II camera deep dives - [X2D II Highlight-Weighted Metering](https://blog.tonalphoto.com/hasselblad-x2d-ii-highlight-weighted-metering/): How the metering mode behaves and when to use it. - [Flash and TTL on the X2D II](https://blog.tonalphoto.com/flash-and-ttl-on-the-x2d-ii/): Sync speed, leaf shutter behavior, TTL compatibility tables. - [Why Your X2D II RAW Files Drop to 14-Bit in Continuous Mode](https://blog.tonalphoto.com/hasselblad-x2d-ii-why-your-raw-files-drop-to-14-bit-in-continuous-mode-and-when-it-matters/): The documented-but-buried bit-depth tradeoff. - [X2D II: Three Firmware Quirks Worth Knowing About](https://blog.tonalphoto.com/hasselblad-x2d-ii-three-firmware-quirks-worth-knowing-about/): Early-firmware behaviors and workarounds. - [Phocus 4.1.2 Tethered Capture: Hidden Focus Tools and Pixel Shift](https://blog.tonalphoto.com/phocus-4-1-2-tethered-capture-hidden-focus-tools-pixel-shift/): Undocumented tethered-capture features including the focus sparkline and measurement reticle. ## File formats and color science - [Hasselblad FFF vs 3FR: Why Renaming Doesn't Work (And Why That's Good)](https://blog.tonalphoto.com/hasselblad-fff-vs-3fr-why-renaming-doesnt-work-and-why-thats-good/): File-format internals and the ExifTool evidence for why they are not interchangeable. - [Phocus 3FRs and HNNR: What I Learned Adding a Hasselblad to My Collection](https://blog.tonalphoto.com/phocus-3frs-and-hnnr-what-i-learned-from-adding-a-hasselblad-to-my-camera-collection/): HNNR denoising workflow and 3FR-specific behavior. - [Phocus Histogram vs Capture One Levels](https://blog.tonalphoto.com/phocus-histogram-vs-capture-one-levels/): What each tool actually measures. ## HDR output workflows - [Hasselblad HDR Output Formats Trilemma](https://blog.tonalphoto.com/hasselblad-hdr-output-formats-trilemma/): The three competing formats and why you cannot pick one that works everywhere. - [Hasselblad HDR Display Requirements](https://blog.tonalphoto.com/hasselblad-hdr-display-requirements/): What your monitor needs to actually show HDR output correctly. - [Hasselblad HDR Print Archival Recommendations](https://blog.tonalphoto.com/hasselblad-hdr-print-archival-recommendations/): Print-side HDR constraints and archival considerations. - [Phocus 4 HDR Workflow: Histogram and Levels](https://blog.tonalphoto.com/phocus-4-hdr-workflow-histogram-levels/): End-to-end HDR adjustment workflow in Phocus. ## Backup and data integrity - [If You Can't Restore It, You Don't Have It: Rethinking Backup](https://blog.tonalphoto.com/if-you-cant-restore-it-you-dont-have-it-rethinking-backup-for-photographers/): Backup philosophy for photographers. - [A Photographer's Backup Nightmare and the App I Built to Prevent It](https://blog.tonalphoto.com/a-photographers-backup-nightmare-and-the-app-i-built-to-prevent-it/): Origin story of ImageIntact. - [ImageIntact Now Available on the Mac App Store for Free](https://blog.tonalphoto.com/imageintact-now-available-on-the-mac-app-store-for-free/): The macOS photo-backup utility. ## Sitemap and feeds - [XML Sitemap](https://blog.tonalphoto.com/sitemap.xml): Canonical URL index for the site. - [RSS Feed](https://blog.tonalphoto.com/rss/): Full-text RSS. ## Attribution and use Content is © Konrad Michels. Short attributed quotations are welcome. For citation, reference the author name "Konrad Michels" and link to the specific post URL. Do not paraphrase technical claims without verifying them against the referenced post — specific version numbers, hardware contexts, and reproduction steps matter.