Macro March 23, 2026 5 min read

Macro Photography: Working Distance Explained

Two macro lenses can both reach 1:1 and still sit at very different distances from the subject when they get there. That gap, the working distance, matters more than almost any other spec when the subject is alive.

Working distance is not minimum focus distance

Minimum focus distance is measured from the camera's sensor to the subject. Working distance is measured from the front of the lens to the subject. The difference is the length of the lens plus the gap inside the camera, which for a 100 mm macro is easily 15 cm or more. The Canon EF 100mm f/2.8 Macro, for instance, has a minimum focus distance of about 31 cm but a working distance at 1:1 of about 15 cm. Always check working distance, not the headline focus distance, when choosing a macro lens for live subjects. A lens hood can take up a good part of the space, so measure with it fitted if you plan to use it.

What the numbers look like

Working distance at 1:1 depends on the lens design, so the figures below are typical measured values, not guarantees. Canon's EF-S 60 mm macro gives about 9 cm, the EF 100 mm about 15 cm, and the EF 180 mm f/3.5L about 24 cm (with a minimum focus distance of 48 cm). Other 180 mm macros from Sigma and Tamron measure around 22 to 23 cm.

Focal length	Working distance at 1:1	Suits
50 mm	about 5 cm	Tabletop, coins, flowers
60 mm	about 9 to 10 cm	Studio, flowers, fungi
90 to 105 mm	about 13 to 15 cm	Most field work
150 mm	about 18 to 20 cm	Warier insects
180 to 200 mm	about 22 to 24 cm	Skittish subjects

A 50 mm macro at 1:1 puts the lens a few centimetres from the subject, which is no use for a wary insect. A 180 mm gives you roughly five times the room for the same magnification.

Why it matters for live subjects

Insects, spiders and small reptiles vary a lot in how close they tolerate a lens. It depends on the species, the temperature and what they are doing. A cool morning insect may sit still while you work at 8 or 10 cm. A bee feeding on a flower may leave the moment a lens barrel enters its view. Longer working distance does not make a skittish subject cooperative, but it raises your chances, and it lets you shoot between stems without the barrel casting shadows or hitting vegetation.

For subjects that can sting or bite, a longer lens gives you a little more room, but do not treat it as a safety measure. Respect the animal's space regardless of the lens.

Choosing a focal length

For most people, a 90 to 105 mm macro is the practical choice: enough working distance for cooperative subjects, light enough to handhold for a whole outing, and flexible enough for portraits too. The Canon RF 100mm f/2.8L, Nikon Z MC 105mm f/2.8 and Sony FE 90mm f/2.8 Macro are all in this class. Move to 150 to 200 mm for dragonflies, wary butterflies, small reptiles and anything where every extra centimetre helps, accepting a longer, heavier, dearer lens. A 50 or 60 mm macro is perfectly good for studio work, flowers and fungi, and it is lighter for travel.

Depth of field at 1:1

At 1:1 the depth of field is tiny. On full frame the total zone in focus is about 0.65 mm at f/5.6, 0.9 mm at f/8, 1.3 mm at f/11 and 1.9 mm at f/16. At half life size (0.5x) the same apertures give about 1.9, 2.8, 3.8 and 5.5 mm. At these magnifications the effective aperture is also narrower than the marked one, so diffraction bites sooner. The usual answer is to stack several frames at f/5.6 to f/8 rather than stopping down, and the diffraction and focus stacking posts on our DOF site explain how.

Working distance and light

Working distance decides how you can light the subject. With 5 cm to play with, as on a 50 mm macro, there is no room for a diffuser between lens and subject, so ring flash or a twin flash bracket is the usual choice. At 15 to 20 cm with a 100 to 180 mm lens, you have room for a small off-camera flash with a diffuser, a reflector or a white card. The lens barrel can also shade the subject at short distances, especially when you shoot downward on the ground. That is why some people shooting tabletop macro prefer a longer lens even for still subjects.

Going past 1:1

Extension tubes add roughly the tube's length divided by the lens's focal length to the magnification, so a 50 mm tube on a 100 mm macro takes you from 1:1 to about 1.5:1. Working distance falls with it, to a few centimetres. Close-up diopters do something similar. For 2:1 and beyond, a dedicated lens designed for that magnification is usually more practical, and working distances are often only a few centimetres.

Approaching an insect

Slow down well before you reach working distance, and move straight toward the subject rather than sideways, since lateral movement triggers many insects more readily. Approach from the front or side rather than above, which can look like a predator. If the subject reacts, with a raised head, opened wings or antennae turned toward you, stop and wait. Many will carry on after half a minute or so. Early morning is a good time, since cool insects are slower and more tolerant.

If you want to know how far away you were in a particular shot, measure the subject's known size in pixels and enter it in the calculator. It tells you the distance, which is useful for judging how much closer you could have got.