milestaya.blogg.se - Macro vs micro lens

The second method is to introduce an external lens to the front of the lens called a dioptre, which shortens the close-focusing distance. The closest focusing distance will also decrease to ~210 mm. Therefore, if the lens’s original magnification was 0.15X, then the new magnification will be 0.15X+0.5X=0.65X. Note: Diagram assumes that the lens is symmetric (pupil magnification = 1).Īn extension tube increases lens magnification by an amount equal to the extension distance divided by the lens focal length.įor example, adding a 25mm extension tube to a 50mm lens will give a magnification gain of 0.5X.

Unlike most lens accessories, extension tubes don’t add any extra optics, and are therefore the most inexpensive, simple devices to achieve close-up photography/cinematography.Įxtension Tube shortens minimum object distance This additional distance allows your lens to focus more closely, which in turn provides more magnification capability. We have six problems to solve if you have a given shot to create and this article aims to help you to decide which lenses and accessories to use to create your desired shot and what factors ought to be considered.Īn extension tube is simply a hollow cylinder that fits in between your camera and lens, causing the lens to move further from the sensor. The basic problems to solve to make a choice of lens However, if you require images with a greater magnification than x10, then we must enter the realms of micro images, which use microscope imaging techniques to produce both higher image quality and levels of magnification too. The distinction for a lens to be classified as a true macro requires it to produce an image size that is as big or bigger than the subject and up to a factor of ten-to-one (X10 or 10:1).

Leitz 90mm PL macro is a dedicated macro lens capable of 1:1.5 magnification.

This is the range where we discern that a shot can be described to be a close-focus image. However, as we move closer to small objects, the image size on the sensor increases in size to become much closer to the real-life size of the subject.Įventually, if we are close enough to the subject whilst still keeping it in focus, we can produce an image that’s the same size as the subject and as we approach this point, the ratio becomes 1:1, or life-size or X1 magnification.

That is a ratio of 1:1000 and is what we are used to seeing with regular lenses. PART 5 – Popular Macro lenses and adapters PART 1 – The fundamentals of Macro/Micro imaging Regular vs Close-up vs Macro vs Micro 20p piece captured with 100mm Canon 100mm macro T2.8įor regular imaging, the size of the image formed on the sensor is much smaller than the subject itself, so the image of a 10-metre tree might only produce an image 1 cm tall on the sensor. PART 4 – Manipulating Perspective and Depth of Field using Nelsonian Optics PART 3 – Magnification, iris and working distance PART 1 – The fundamentals of Macro/Micro imaging This article seeks to give the cinematographer a better understanding of these concepts and to improve their close-up macro and micro photography/cinematography and is broken up into 5 distinct sections: Increasing degrees of magnification from macro to 16x micro, shot with InfiniProbe TS160 lens The choice right lens for the specific shot is key and this article aims to explain the differences between Close Up, Macro and Micro photography/cinematography and in particular, to introduce the cinematographer to a relatively recent new type of lens for motion-picture, made by Infinity Photo-Optical and which use microscope techniques to create unique images, using a 2 path optical process which increases magnification, producing shots not possible using traditional optics and which require different shooting techniques to achieve the best results. We all love to see images of extreme magnification to show a world which we can’t experience with our own eyes but just like all cinematography, this is hard to do well.