30–120 cm
Typical length (family range)
1/800 s
Shutter: perched / still
1/2000 s
Shutter: action / flight
f/5.6–f/8
Aperture
9,056
Research-grade sightings in N. America
Recommended camera settings#
ModeManual + Auto ISOLock shutter & aperture, let ISO float
Shutter (still)1/800 s
Shutter (action)1/2000 s
Aperturef/5.6–f/8
FocusAF-C + subject/eye detectionGet down to eye level; a long lens with close focus (or an extension tube) helps with small subjects.
DriveHigh-speed burst
Lens100–400 mmFull-frame equivalent
Focal length needed to frame it#
For a subject about 75 cm long filling a third or half of the frame width horizontally.
| Distance | ⅓ of frame (FF) | ½ of frame (FF) | ⅓ of frame (APS-C) | ⅓ of frame (MFT) |
|---|---|---|---|---|
| 5 m (16 ft) | 78 mm | 117 mm | 52 mm | 39 mm |
| 10 m (33 ft) | 156 mm | 234 mm | 104 mm | 78 mm |
| 15 m (49 ft) | 234 mm | 352 mm | 156 mm | 117 mm |
| 20 m (66 ft) | 312 mm | 469 mm | 208 mm | 156 mm |
| 30 m (98 ft) | 468 mm | 703 mm | 312 mm | 234 mm |
| 50 m (164 ft) | 780 mm | 1,172 mm | 520 mm | 390 mm |
Field-craft tips#
- Get down to eye level; a long lens with close focus (or an extension tube) helps with small subjects.
- Sightings peak in January, February and March, which is when you'll have the most chances.
Ethics#
- The welfare of the animal comes first: if it changes its behaviour because of you, you are too close.
- Stay on trails, respect closures around nests, leks, dens and haul-outs.
- Avoid playback and baiting in sensitive seasons; never bait predators.
- Don't share precise locations of rare, nesting or roosting animals publicly.
Frequently asked questions#
What lens do I need to photograph a Brown-throated Three-toed Sloth?
At about 75 cm long, a brown-throated three-toed sloth fills a third of a full-frame image at 10 m with roughly 156 mm, or at 20 m with 312 mm.
What shutter speed should I use for a Brown-throated Three-toed Sloth?
1/800 s when it's still; 1/2000 s for action.
When is the best time to photograph a Brown-throated Three-toed Sloth?
Observations in North America peak in January, February and March. Early morning and late afternoon give the best light and activity.
Sources & licences#
- iNaturalist — Observation data CC BY-NC; photo licence as credited
Last updated October 03, 2026 · How we calculate · Sources