The instinct is to buy the longest lens you can afford, and it is often the wrong instinct. In a close-quarters reserve, eight hundred millimetres leaves you backing up and clipping ears; on an open plain, four hundred leaves the animal a speck. Reach is a decision matched to the place, not a number to maximise.
What each length gives you
| Focal length | Best for | The catch |
|---|---|---|
| 400mm | Close reserves — Mara, Sabi Sands; big animals nearby | Too short for small or distant subjects and most birds. Versatile and light; often paired as a zoom's long end. |
| 500mm | The safari all-rounder | Enough reach for most plains game and many birds, still hand-holdable. The single most forgiving choice. |
| 600mm | Distant plains game, birds, wary subjects | The sweet spot for reach vs weight. Big and heavy, but covers the widest range of sightings. |
| 800mm | Small birds, very distant or skittish animals | Superb reach, but often too much in close reserves, and heavy. A specialist's length, not a first-trip one. |
Reach is a decision matched to the place, not a number to maximise.
Park by park, and the crop factor
The close reserves — the Masai Mara, Sabi Sands, many private conservancies — put you near big cats, where 400–500mm frames them comfortably and 800mm is a liability. The open systems — the Serengeti plains, Amboseli, Etosha — reward every millimetre past 500. And your sensor changes the whole sum: a crop body turns a 400mm lens into an effective 600, so a crop-sensor photographer needs less glass to reach the same frame. Before you buy for reach, check what your body already multiplies.
Get the focal length matched to your parks
Tell the AI Coach the exact reserves on your itinerary and your sensor, and it maps the focal length you actually need — and whether a teleconverter closes the gap.
Meet the AI CoachCommon questions
What focal length do I need for an African safari?
Five hundred millimetres is the most forgiving all-rounder, with 600mm ideal for open plains and distant subjects, and 400mm enough in close reserves like the Masai Mara. Eight hundred is a specialist length that is often too much for a first trip.
Is 400mm enough for a safari?
In close reserves with big animals nearby, yes. On open plains, or for birds and distant subjects, 400mm often leaves the animal small in the frame — 500–600mm is more comfortable there.
Do I need 600mm for safari?
Six hundred millimetres is the sweet spot for reach and covers the widest range of sightings, but it is heavy. If your itinerary is mostly close reserves, 400–500mm is enough; open plains reward the extra reach.
Does a crop sensor change the focal length I need?
Yes. A crop-sensor body multiplies focal length — roughly 1.5–1.6× — so a 400mm lens reaches like a 600mm. Crop shooters can carry less glass to reach the same frame.