The effect of star rays in photos
When shooting a bright light source into the frame, you can get an interesting effect with the rays of light. This effect is usually called Star Effect. This effect is…

Continue reading →

What is TFP and TFCD and what they eat
Recently, especially in the conditions of the economic crisis, the term TFP, which in its most simplified form means free-of-charge photography, is increasingly heard among photographers and models. Those who…

Continue reading →

Receptions photography at long exposures. Light painting.
“Late in the evening, when you sit at home and do not know what to do, experiment with a long exposure.” I think one of the ancient wise men said…

Continue reading →

Dependence of the viewing angle of the lens on the focusing distance

When focusing on some lenses you can notice a very interesting effect. Many lenses change (usually reduce) the field of view when focusing from infinity to MDF (minimum focusing distance). In Western literature, this effect is called ‘Focus Breathing’.

This can be easily checked, it is enough to turn off the auto focus on the lens and focus on anything from infinity to MDF, and you can see that the frame borders are expanding and tapering, and there is nothing to blur the boundaries.

Lenses that give the same viewing angle when focusing on infinity can give different viewing angles when focusing on MDF. Here is an example from three 85 / 1.8 class lenses. All shot from a tripod with the same focusing distance.

85 85 85
This effect is very noticeable when working with macro lenses that change the maximum aperture value depending on the focusing distance. For example, you can read about it in the Nikon 105mm f / 2.8D AF Micro-Nikkor and Tamron SP AF 90mm 1: 2.8 Di MACRO 1: 1 272E for Nikon macro lenses. For a simple understanding, we can say that when focusing the lens makes an easy zoom. This also applies to the fix lens and zoom lenses. Visually, it is easy to understand the effect using the example of the Tamron SP AF 90mm 1: 2.8 Di MACRO 1: 1 lens fix, in which the trunk is extended when focusing in macro mode, as if the lens performs a zoom, and the field of view also changes.

Personal experience

Changes in the field of view when focusing sometimes unnerve at times, since this leads to the fact that parts of the desired composition fall outside the frame, and you have to approach or move away from the subject. When I shoot a macro, this effect is especially noticeable. Visually, it seems that the focal length of the lens changes, while they say that the lens changes its focal length – this is not quite so. The focal length is measured when focusing at infinity, when the rays go parallel to the optical axis, but when focusing in the direction of MDF, it is no longer possible to talk about focal distance.

findings

The effect described above is not always noticeable in practice and you should not worry much about it. What is ‘Focus Breathing’ well known to videographers, who are more annoyed by this effect than photographers 🙂

Crop Identification
This article is written in photographic slang and, moments, filled with my subjective opinions. This article describes the nuances of using crooked cameras and lenses that few people pay due…

...

Pixels and subpixels
Once I wondered: ‘Why do my Nikon D700 RAW files weigh so little?’. In search of an answer, I found very interesting information. So, when shooting, I sometimes use the…

...

A bunch of two lenses for macro photography
There is an easy way to get the ability to take a macro shot - this is to use reversing rings. Reversible rings are also called wrap rings. Reversible rings…

...

RAW converter
Modern digital photography is very much connected with image processing programs. Sometimes it is the photo editor that creates exactly the photo that we ultimately consider the work of the…

...