# Source Registry

## Source #1
- **URL**: https://rcdrone.top/products/viewpro-z40k-4k-gimbal-camera
- **Tier**: L2 (authorized reseller with full spec sheet)
- **Summary**: Complete ViewPro Z40K specifications including sensor, zoom, gimbal, OIS details
- **Date Accessed**: 2026-03-21

## Source #2
- **URL**: https://www.viewprouav.com/product/z40k-single-4k-hd-25-times-zoom-gimbal-camera
- **Tier**: L1 (manufacturer official)
- **Summary**: ViewPro official product page with specifications
- **Date Accessed**: 2026-03-21

## Source #3
- **URL**: https://ukrspecsystems.com/drone-gimbals/usg-231
- **Tier**: L1 (manufacturer official)
- **Summary**: USG-231 official specifications, features, integration details
- **Date Accessed**: 2026-03-21

## Source #4
- **URL**: https://ukrspecsystems.com/drones/shark-m-uas
- **Tier**: L1 (manufacturer official)
- **Summary**: Shark M UAS full specifications, camera options, system details
- **Date Accessed**: 2026-03-21

## Source #5
- **URL**: https://dronexpert.nl/en/viewpro-z40k-20x-optical-zoom-4k-camera-up-to-40x-zoom/
- **Tier**: L2 (authorized dealer)
- **Summary**: Z40K detailed specs including effective pixel counts per resolution mode
- **Date Accessed**: 2026-03-21

## Source #6
- **URL**: https://www.aeroexpo.online/prod/ukrspecsystems/product-185884-82835.html
- **Tier**: L2 (trade platform with manufacturer data)
- **Summary**: USG-231 specifications and integration details
- **Date Accessed**: 2026-03-21

## Source #7
- **URL**: https://en.defence-ua.com/weapon_and_tech/how_the_newest_ukrainian_shark_uav_works_over_donetsk_and_why_its_really_cool_video-5438.html
- **Tier**: L3 (defense media analysis)
- **Summary**: Shark UAV combat footage analysis, camera quality observations, auto-tracking assessment
- **Date Accessed**: 2026-03-21

## Source #8
- **URL**: https://www.cameraguidepro.com/what-is-the-difference-between-a-2-axis-and-3-axis-gimbal/
- **Tier**: L3 (tech media)
- **Summary**: 2-axis vs 3-axis gimbal comparison, wobble/jello effect analysis
- **Date Accessed**: 2026-03-21

## Source #9
- **URL**: https://www.makeuseof.com/two-axis-vs-three-axis-gimbals/
- **Tier**: L3 (tech media)
- **Summary**: Detailed 2-axis vs 3-axis trade-offs including weight, power, cost
- **Date Accessed**: 2026-03-21

## Source #10
- **URL**: https://droneflyingpro.com/2-axis-vs-3-axis-gimbal/
- **Tier**: L3 (drone specialist media)
- **Summary**: 2-axis vs 3-axis on drones with diagrams, jello effect explanation
- **Date Accessed**: 2026-03-21

## Source #11
- **URL**: https://www.steadxp.com/digital-vs-optical-stabilization-a-comparison-guide/
- **Tier**: L3 (stabilization specialist)
- **Summary**: EIS vs OIS comparison, quality impact, artifact analysis
- **Date Accessed**: 2026-03-21

## Source #12
- **URL**: https://www.guidingtech.com/eis-vs-ois-stabilization/
- **Tier**: L3 (tech media)
- **Summary**: Digital vs optical stabilization advantages and limitations
- **Date Accessed**: 2026-03-21

## Source #13
- **URL**: https://www.dronetrest.com/t/whats-the-best-choice-for-the-fixed-wing-3-axis-gimbal-or-2-axis-gimbal/8091
- **Tier**: L4 (community forum)
- **Summary**: Fixed-wing drone gimbal selection discussion, practitioner perspectives
- **Date Accessed**: 2026-03-21

## Source #14
- **URL**: https://phantompilots.com/threads/yaw-issue-with-2-axis-gimbals.6854
- **Tier**: L4 (community forum)
- **Summary**: Real user reports of yaw wobble issues with 2-axis gimbals
- **Date Accessed**: 2026-03-21

## Source #15
- **URL**: https://www.manualslib.com/manual/2385515/Viewpro-Z40k.html
- **Tier**: L1 (manufacturer manual)
- **Summary**: ViewPro Z40K user manual with detailed technical specifications
- **Date Accessed**: 2026-03-21

## Source #16
- **URL**: https://www.viewprotech.com/index.php?ac=article&at=read&did=202
- **Tier**: L1 (ViewPro official tech page)
- **Summary**: Z40K DJI PSDK series technical details, stabilization specs
- **Date Accessed**: 2026-03-21

## Source #17
- **URL**: https://pro.sony/ue_US/products/zoom-camera-blocks/fcb-ev9500l
- **Tier**: L1 (Sony official)
- **Summary**: Sony FCB-EV9500L block camera specs — likely module inside USG-231
- **Date Accessed**: 2026-03-21

## Source #18
- **URL**: https://block-cameras.com/products/sony-fcb-ev9520l-30x-zoom-full-hd-block-camera-sensor-starvis-gen2
- **Tier**: L2 (distributor)
- **Summary**: Sony FCB-EV9520L STARVIS 2 block camera specs
- **Date Accessed**: 2026-03-21

## Source #19
- **URL**: https://medium.com/@daily_drones/hands-on-with-the-dji-zenmuse-z30-53ab50fe628c
- **Tier**: L3 (tech reviewer)
- **Summary**: DJI Zenmuse Z30 hands-on review (same class as USG-231 sensor)
- **Date Accessed**: 2026-03-21

## Source #20
- **URL**: https://www.oreateai.com/blog/beyond-the-numbers-what-123-vs-113-inch-sensor-size-really-means-for-your-photos/
- **Tier**: L3 (tech blog)
- **Summary**: Sensor size comparison impact on image quality
- **Date Accessed**: 2026-03-21

## Source #21
- **URL**: https://en.wikipedia.org/wiki/Ukrspecsystems_Shark
- **Tier**: L3 (Wikipedia)
- **Summary**: Shark UAV family specifications and history
- **Date Accessed**: 2026-03-21

## Source #22
- **URL**: https://en.defence-ua.com/weapon_and_tech/ukrainian_drone_maker_demonstrates_its_new_shark_uav_target_tracking_capabilities_video-4803.html
- **Tier**: L3 (defense media)
- **Summary**: Shark UAV target tracking demo and zoom capabilities
- **Date Accessed**: 2026-03-21
