![]() ![]() Most explanations of diffusion relating to photography are poor. Once you get that and the idea that the bigger the angle of the light source from the subject's perspective, the better the diffusion, then you get diffusion. All this does is push the light from the flash head through the diffuser material and in effect the diffuser material becomes the light source. In extreme macro it is common to use direct diffusion, ie a flash with a diffusing material in front of it. But something like half or 2/3 of a pingpong ball covering the whole sky and some of the subject - now that's nice extreme macro diffusion. Therefore it creates parallel rays, which means harsh shadowsįlashlights, even covered with a semi translucent flashead sized diffuser, actually isn't that much better, as shown. This is well illustrated by direct sunlight, which may come from an enormous light source (the sun), but it is very far away so the light occupies only a pinprick on the sphere. What actually matters is the arc of your light source on the imaginary sphere, relative to your subject. Without a diffuser, a flash unit just has the front of the flash as its light source, and therefore the light is a very small source - even if you cover it with a soft plastic flash diffuser the same size. This is like a pingpong ball on a very small subject. The diffuser has become the light source rather than the small flash head that sits behind it shooting through. The light through a diffuser, close to the fly and mounted above, will cover a large part of the imaginary sphere and thus arrive at the fly from a large variety of angles (ie not parallel), creating nicely diffused light. Harsh light really doesn't work well at all because specular highlights are reflected back, show in the image and the shadows are very dark.Ĭonsider a fly at the centre of this imaginary sphere. This is a huge concept in extreme macro photography lighting, especially with subjects such as insects which often have a shiny carapace. Tastes differ, but generally shadows are not great. Well diffused light sources like the top one occupy a large part of the area round a subject and light arrives at the subject from a variety of angles, whereas harsh light sources like the two below come from a small "pin" source, and therefore parallel rays, from the same direction, making shadows. This is an imaginary pingpong sized sphere round a subject. The second thing that they'll start comparing is diffusion, the materials and means, and the holy grail of the perfectly diffused extreme macro diffuser. Put a haggle of extreme macro photographers in a room and the first thing they'll talk about is the lenses they use. ![]() Size doesn't matter, the portion of the sphere round the subject it occupies matters. You can have the biggest light bulb in the world (the sun) but it's not diffused. It does not store any personal data.Diffusion is a vital aspect of extreme macro photography, and a good understanding of diffused light starts by looking at the lighting you're using from the specimen's point of view. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". ![]() This cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is used to store the user consent for the cookies in the category "Other. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". ![]() The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. ![]()
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