![]() ![]() For example, when producing a 6×4-inch (15×10-cm) print using 35 format (36×24 mm) film or sensor, a life-size result is possible with a lens having only a 1:4 reproduction ratio. Īpart from technical photography and film-based processes, where the size of the image on the negative or image sensor is the subject of discussion, the finished print or on-screen image more commonly lends a photograph its macro status. Likewise, a macro lens is classically a lens capable of reproduction ratios of at least 1:1, although it often refers to any lens with a large reproduction ratio, despite rarely exceeding 1:1. The ratio of the subject size on the film plane (or sensor plane) to the actual subject size is known as the reproduction ratio. Macro photograph of an ant Macro photograph of a fern sorus using 4:3 aspect ratio Headshot of a dragonfly taken with a 100 mm macro lens coupled with a 50 mm lens in reverse at the end. ![]() Please check our Dental Photo Master Equipment section to see available models and brands of such lenses.Photography genre and techniques of extreme close-up pictures Macro photograph of a common yellow dung fly ( Scathophaga stercoraria) made using a lens at its maximum 1:1 reproduction ratio, and an 18×24mm image sensor, the on-screen display of the photograph results in a greater than life-size image. If your main concern is the price, consider a cheaper 100mm lens from Tokina or Tamron. ![]() Summary: these facts should convince you to use a 100mm lens. If you want to know more about lenses, please visit our lessons! It can influence the light distribution and lead to fogging of the front of the lens, caused by the patient’s breathing. In reality, the distance from the front of the lens to the object is half of the minimum focus distance… The practical implication is, that in 1:1 reproduction ratio (maximum magnification) with a 60mm lens you are very close to the teeth. Let’s look at the example of two lenses from Nikon: 60mm and 105mm.įor Nikon AF-S VR Micro-NIKKOR 105mm f/2.8G IF-ED lens – minimum focus distance is 30.48cmįor Nikon AF-S Micro-NIKKOR 60mm f/2.8G ED lens – minimum focus distance is 18.49cm The shorter focal length of the macro lens, the shorter minimum focus distance… It means that you can get very close to the object. ![]() Every lens has this parameter, described in millimeters or centimeters. A process of case analysis, esthetic treatment planning or communication with the patient is very limited without portrait photographs.Īnother advantage is the minimum focus distance, which is the closest distance from the focal (sensor) plane to the object, which will stay in focus, creating a sharp image as the result. Portrait photography is an important part of the dental documentation. Lenses with shorter focal lengths will create bigger (wide angle lenses 14-35mm) or smaller distortion (50-60mm). Look at the illustration beneath, showing face distortion depending on the focal length. Lenses in the range of focal length from 85 to 135mm are the best ones for portrait photography and will create less distortion, which is crucial for face analysis. Especially in portraits, you will realize the superiority of 100mm. From Theory to Practice!Ī universal macro lens allows me to take both: intraoral and portrait photographs. Check out our new, free Webinar: Dental Photography. With a limited budget, a 60mm lens looks attractive and it is tempting to make an extra saving to spend for a dinner with beloved ones… But please think about a lens, which will be universal. There are 2 main reasons why you should select a 100mm lens: minimal focusing distance and portrait photography. The best focal lengths for dental photography are the ones around 100mm (some models will be 90, 100 or 105mm, depending on the brand). The question is, which ones are better for dental photo-documentation? Of course, the price is one of the factors influencing our choice, but it should not be the primary criteria. On the market,we can find macro lenses with magnification ratio (1:1) with focal lengths in the range from 40 to 200mm. ![]()
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