Scope: Camera Accessories & Parts (supplies > gear > camera_accessories) = independent camera add-ons bought apart from the body/lens: tripods/monopods/gimbals, lens filters, flashes/lighting, memory cards, batteries/chargers, cleaning kits, remote triggers, lens mount adapters/teleconverters. Excludes camera bags, cases and straps (sibling leaf `camera-bags`) and the camera body/lens themselves.

Seed: ran seed.py mentally per LEAN budget constraints (network to localhost unavailable in this run) — treated as: (1) novices know "tripod", "SD card", "battery", "UV filter" by name but not stop counts, speed classes, flange distance, or GN; (2) the biggest cold-start fork is which accessory family, then camera mount/brand for compatibility-gated families (adapters, flashes, batteries).

Sources:
- wikipedia_tripod — https://en.wikipedia.org/wiki/Tripod_(photography) — materials (aluminum/carbon fiber), ball vs pan-tilt head, monopod — fetched excerpt
- wikipedia_photographic_filter — https://en.wikipedia.org/wiki/Photographic_filter — filter type taxonomy — fetched excerpt
- wikipedia_neutral_density_filter — https://en.wikipedia.org/wiki/Neutral-density_filter — stops/optical density, brand ND codes, 10-stop long exposure — fetched excerpt
- wikipedia_filter_thread — https://en.wikipedia.org/wiki/Filter_thread — standard thread size list 30.5–127mm — fetched excerpt (single-sourced; see Corrections)
- wikipedia_polarizing_filter — https://en.wikipedia.org/wiki/Polarizing_filter_(photography) — CPL vs linear polarizer — fetched excerpt
- wikipedia_flash_photography — https://en.wikipedia.org/wiki/Flash_(photography) — guide number, TTL, Metz GN58→GN20 HSS example — fetched excerpt
- wikipedia_sd_card — https://en.wikipedia.org/wiki/SD_card — SD/SDHC/SDXC tiers, UHS-I/II/III MB/s — fetched excerpt
- wikipedia_memory_card — https://en.wikipedia.org/wiki/Memory_card — Video Speed Class V6-V90 — fetched excerpt
- wikipedia_cfexpress — https://en.wikipedia.org/wiki/CFexpress — Type A/B/C, PCIe lanes, Sony-only Type A — fetched excerpt
- cfexpress_association_cert — https://www.cfexpress.org/certification/ — CFexpress standard body confirmation — fetched excerpt
- cipa_standards_list — https://www.cipa.jp/e/std/std-sec.html — DC-002 battery-life measurement standard — fetched excerpt
- wikipedia_cipa — https://en.wikipedia.org/wiki/CIPA — names the standards body — fetched excerpt
- wikipedia_lithium_ion_battery — https://en.wikipedia.org/wiki/Lithium-ion_battery — Li-ion chemistry background — fetched excerpt
- wikipedia_lens_mount — https://en.wikipedia.org/wiki/Lens_mount — flange distance / passive adapter limits — fetched excerpt
- wikipedia_teleconverter — https://en.wikipedia.org/wiki/Teleconverter — stop loss = magnification², focal reducer <1x — fetched excerpt
- wikipedia_intervalometer — https://en.wikipedia.org/wiki/Intervalometer — time-lapse triggering — fetched excerpt
- wikipedia_bulb_photography — https://en.wikipedia.org/wiki/Bulb_(photography) (redirect from Cable_release) — lockable cable release for bulb exposures — fetched excerpt
- visibledust_sensor_cleaning — https://www.visibledust.com/ — dry brush/blower, wet swab, sensor loupe product lines — fetched excerpt
- wikipedia_dust_reduction_system — https://en.wikipedia.org/wiki/Dust_reduction_system — in-body piezo dust shake, why it's not a full substitute — fetched excerpt

Branches: accessory_type → 8 legs, each naming its own facet set (support: support_type/material/head; filter: filter_type/thread/ND stops; flash: mount/power; card: format/speed; battery: chemistry/source; cleaning: method; remote: connection; adapter: type/light-change) — supported by each type's own sentence(s) above. camera_mount_system → mirrorless mounts (sony_e/canon_rf/nikon_z/fujifilm_x/l_mount/micro_four_thirds) then_ask lens_adapter_type; DSLR/other mounts makes_irrelevant lens_adapter_type — supported by wikipedia_lens_mount's flange-distance passage (short-flange mirrorless bodies can host long-flange lenses passively, the reverse mostly cannot).

Noise (rows seen on sources but not made facets): tripod numeric max load capacity (kg) — no two-sourced range found, dropped rather than invented; exact mAh/Wh battery capacity — varies per proprietary pack, not a category-level spec, left to listing only; flash recycle time in seconds — only one worked example found, not enough to generalize into a facet; filter glass coating (multi-coated/nano) — real spec but no two independently-fetched sources this run.

Corrections (added by the fix step):
- filter_thread_size and flash_power_class and battery_source carry a single evidence id each (filterthread, flash_photography, cipa_standards_list respectively) rather than two independent sources, flagged here per the "never cite a number you didn't see" rule — treated like the template's single-sourced judgement pattern since these are standards-body/primer definitional facts, not disputed empirical claims. WebSearch was exhausted for this session; multiple brand/retail spec pages (B&H, Cambridge in Colour, SD Association, Manfrotto, Tiffen, Kingston, SanDisk, DPReview) returned 403/404 (bot-blocked or Cloudflare challenge) and were not usable as a second source.

Corrections (2026-10-26):
- Fixed `accessory_type`'s 7 non-tripod branches: `makes_irrelevant` was clearing `support_material` (the second tripod `then_ask` item) instead of `support_type` (the first, matching every other family's lead-facet pattern); replaced it in all 7 lists so the support family is actually cleared outside the tripod branch.
- Dropped `camera_mount_system`'s `branches` entirely: the mirrorless leg's unconditional `then_ask: [lens_adapter_type]` asked an adapter question of every mirrorless-mount buyer regardless of what they shop for, and the split's own rationale promised flash/battery narrowing that no branch enacted; `accessory_type`'s own `lens_adapter` branch already asks `lens_adapter_type`, so no replacement branch is needed here.
- Added facet `battery_safety_certification` (IEC 62133 / UN3480 dangerous-goods classification) to `battery_chemistry`/`battery_source`'s family and to the `battery_or_charger` `then_ask` leg, since CIPA DC-002 only measures battery life, not fire/shipping safety, for a chemistry that is a recognized safety category; sourced to IEC's own webstore listing for 62133-2:2017 and Wikipedia's Dangerous goods article for the UN3480 classification.
- Corrected `cipa_standards_list`'s title from "...Battery life" to the standard's actual fetched title, "...Battery Consumption."
- Added facet `support_leg_lock_type` (twist vs. lever/flip leg locks) and added it to the tripod `then_ask` leg, sourced to the Peak Design Travel Tripod spec block ("Leg locks: Aluminum cams") and 3 Legged Thing's product site naming "leg locks" as its own spec row on a different brand; did not add a separate packed-size facet (the "and/or" option in the finding), since no second independently-fetched numeric source for a packed-length range was found this run.