![]() The stacked pictures are life transferred to the computer and stacked with Helicon Focus pro and processed with Helicon filter. Lens focus stacking can be made without extra equipment, but is easier to use a tethering software (Lumix tether) installed on a powerful computer. In order to enhance magnification a Raynox M 250 close up lens and automatic extension tubes (10+21 mm) have been used. This lens has its highest resolution at about f =4.5. Zuiko Digital ED 60 mm f 2.8 Macro was used. It includes a 20 cm diameter darkfield ringlight, home made, with Film Grade ® White LED strip light ( 5600 K, CRI 95, ).Īs camera a Panasonic Lumix DC-G9 (electronic curtain mode) with a Olympus M. Made from aluminium profiles it has a wight of ~ 16 kg and folded a dimension of 36x30x80 cm. It was assembled to be stable, versatile and transportable. This method can be called lens focus stacking.įor my experiments I built and used a camera stand ( based on earlier setups) which is shown in the drawing. A informative book of Groß & Crassman (2019) gives details. In more recent versions camera manufacturers integrated such functions into the camera software. First applications used a macro lens with a focus motor which was driven by a tethering software like Helicon remote which supports Nikon and Canon Cameras. ![]() In this method the distance between object and camera optics combination is fixed, only the focus of the lens is varied. First versions used manual adjustment, but soon stepper motor driven (automated versions like stackshot or stackmaster) have been used. Either the camera optics-combination, or the object is moved. ![]() a micrometer sliding table) allowing to vary the distance between a focused lens on the object. Stacking (or multi layer composition) started with a mechanical rail (e.g. Now with a 60 mm lens the lowest limits go down to less than 2 mm, if a digital zoom of 4x is used. ![]() Focus stacking on the camera using a macro lens has been reported before by the author using a 30 mm macro lens:ĭue to the low working distance the use of a close up lens and extension tubes in this report was not possible. Not expensive extra equipment like close up lenses and extention tubes expand the reproduction scale further and the author was interested to find out the useful limits. At present this is available mainly at MFT-cameras with a 13x17,3 mm sensor in connection with a macro lens limited to a reproduction scale of 1:1. This function allows to change the focus of the attached lens without extra equipment. One of the features is called focus bracketing. In Germany is one of the pioneer companies in this field.Īlso the camera and lens producers made new cameras which support focus stacking. This includes stacking software, camera rails and control equipment and setups. Now, if you’re familiar with camera optics, you’ll know that the depth of field is affected by three key factors: Lens focal length.Since my first use in in micromineral photography ( Betz, 2005), focus stacking has made significant progress and industy has developed equipment to use the technique. In other words, focus stacking is only necessary if you’re faced with a scene that can’t be well handled by your camera setup’s current depth of field capabilities. It means that if you have a number of partially focused photos – a stack – the program will render it into a fully focused image by combining the sharpest areas from each photo of the stack. This software is a unique focus stacking tool allowing to achieve images with theoretically unlimited depth of field. “Like other Canon EOS R System features, focus bracketing is all about using the latest technology to make it easier for people to expand their creative potential and obtain great results.” How does Helicon Focus work? Olympus is a key manufacturer offering built-in focus-stacking cameras, and the OM-D E-M1 Mark III is one of their best options thanks to a great set of features, a robust design, and excellent ergonomics. Our top pick is the Olympus OM-D E-M1 Mark III.
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