Tips & Techniques

How to Choose a Close-up Lens (Close-up Lens Instruction Manual)

Each exchangeable lens for a camera has their closest focal distance.

The distance for almost all of them is 25cm – 50cm minimum. Moreover when it's possible to approach a subject, it's possible to do close-up photography.

That's because the size of the subject projected onto an image sensor has become larger.

The shortest focal distance can be shortened further by installing a Close-Up filter to the lens.

If you are able to approach subject close enough, you can photograph it.

The point to choose appropriate magnification of the close-up lens is the closest focus distance of the lens.

When the closest focus distance of the lens is more than 1m, you will use close-up lens +1 and +2.

When it is 30cm - 50cm, you will use close-up lens +3 and +4.

As for the combination of a macro-lens (originally the closest focus distance is short) and close-up lens, the effect is little.

When installing the +10 close-up filter, the closest focus distance will be 10cm, so please be careful about this working distance.

Calculation of the closest focus distance when close-up filters are installed:

There are types from +1 multiplication to +10 multiplication, and the closest focal distance of each lens with the close-up filter attached in the ∞ (infinity) setting can be calculated from the formula below.

+1 lens: the closest focus distance in the ∞ (infinity) ≒ 1m

+2 lens: the closest focus distance in the ∞ (infinity) ≒ 50cm

+3 lens: the closest focus distance in the ∞ (infinity) ≒ 33cm

+4 lens: the closest focus distance in the ∞ (infinity) ≒ 25cm

+10 lens: the closest focus distance in the ∞ (infinity) ≒ 10cm

This calculation is an approximation. May vary depending on lens.

The closest focal distance is the distance to the subject from the lens top.

(*1) Be careful about the full length of the original lens.