Letter to the Editor
Macro Lens for Mirrorless Cameras in Digital Photography in Dermatology
Objetivos macro para cámaras mirrorless en fotografía dermatológica
P. Vilas Boas
, A. Sánchez Herrero, I. Hernández Aragüés, R. Suárez Fernández
Corresponding author
Servicio de Dermatología, Hospital General Universitario Gregorio Marañón, Madrid, Spain
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B, A homogeneous area of pinkish color only is observed along with fine arborizing telangiectasias. The whitish area corresponds to the biopsy scar. C, Case 2: MVH (right) adjacent to a ruby dot (left) on the forearm of a 70-year-old male. D, Dermoscopic image of MVH showing a reddish homogeneous central area and fine, patchy telangiectasias. E, Case 3: MVH on the right side of a 32-year-old woman. F, Dermoscopy shows a central area of whitish-pink color with branched telangiectasias and a milium pseudocyst inside, surrounded by an erythematous area with a peripheral network of telangiectasias.</p>" ] ] ] "autores" => array:1 [ 0 => array:2 [ "autoresLista" => "A. Giacaman, L.J. del Pozo, A. Bauzá, C. Saus" "autores" => array:4 [ 0 => array:2 [ "nombre" => "A." "apellidos" => "Giacaman" ] 1 => array:2 [ "nombre" => "L.J." "apellidos" => "del Pozo" ] 2 => array:2 [ "nombre" => "A." "apellidos" => "Bauzá" ] 3 => array:2 [ "nombre" => "C." 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Vilas Boas, A. Sánchez Herrero, I. Hernández Aragüés, R. Suárez Fernández" "autores" => array:4 [ 0 => array:4 [ "nombre" => "P." "apellidos" => "Vilas Boas" "email" => array:1 [ 0 => "Pedro.22.pvb@gmail.com" ] "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">*</span>" "identificador" => "cor0005" ] ] ] 1 => array:2 [ "nombre" => "A." "apellidos" => "Sánchez Herrero" ] 2 => array:2 [ "nombre" => "I." "apellidos" => "Hernández Aragüés" ] 3 => array:2 [ "nombre" => "R." "apellidos" => "Suárez Fernández" ] ] "afiliaciones" => array:1 [ 0 => array:2 [ "entidad" => "Servicio de Dermatología, Hospital General Universitario Gregorio Marañón, Madrid, Spain" "identificador" => "aff0005" ] ] "correspondencia" => array:1 [ 0 => array:3 [ "identificador" => "cor0005" "etiqueta" => "⁎" "correspondencia" => "Corresponding author." ] ] ] ] "titulosAlternativos" => array:1 [ "es" => array:1 [ "titulo" => "Objetivos macro para cámaras <span class="elsevierStyleItalic">mirrorless</span> en fotografía dermatológica" ] ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "fig0015" "etiqueta" => "Figure 3" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr3.jpeg" "Alto" => 467 "Ancho" => 700 "Tamanyo" => 65064 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Photograph of the oral cavity taken with adequate lighting, which allows higher-quality photographs and faster focusing.</p>" ] ] ] "textoCompleto" => "<span class="elsevierStyleSections"><p id="par0005" class="elsevierStylePara elsevierViewall">Photography is an important element of dermatology and the day-to-day activity of dermatologists. Photographs provide an objective method for recording various skin conditions and allow rigorous measurements and assessments.<a class="elsevierStyleCrossRefs" href="#bib0020"><span class="elsevierStyleSup">1,2</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall">For dermatologists, it is important to have a small, lightweight camera that is portable and easy to use.<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">2</span></a></p><p id="par0015" class="elsevierStylePara elsevierViewall">Until a few years ago, the lenses on smaller (compact) cameras were not interchangeable and had low macro capability (an important characteristic in dermatologic photography). The only way to achieve a short focal length with such a camera is to use the wide-angle position, which causes the subject to appear distorted.<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">2</span></a></p><p id="par0020" class="elsevierStylePara elsevierViewall">Since the advent of the mirrorless camera, it is now possible to purchase small, lightweight cameras with large sensors and interchangeable lenses, thus combining the portability of a compact camera with the quality of a single-lens reflex (SLR) camera. Mirrorless cameras allow the use of fixed-focal-length lenses, which provide higher image quality than the zoom lens of a traditional compact camera.<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">2</span></a></p><p id="par0025" class="elsevierStylePara elsevierViewall">Lighting is another important characteristic in dermatologic photography. Some authors recommend flash photography, which makes it possible to use a smaller aperture and guarantees uniform lighting and color-temperature conditions in all photos.<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">2</span></a> Other authors have argued that the use of flash in dermatologic photography can lighten skin tone, reduce contrast, and produce luminous reflections or shadows.<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">3</span></a> The use of a ring flash avoids the lens-shadow effect caused by a traditional flash. With a ring flash, it is also easier to take photographs of the oral cavity with adequate lighting. A ring flash is generally a large device that can only be attached to an SLR camera.</p><p id="par0030" class="elsevierStylePara elsevierViewall">As mirrorless cameras have grown in popularity over the past few years, various lenses with very good features have been introduced on the market, but very few have all the necessary qualities for dermatologic photography.</p><p id="par0035" class="elsevierStylePara elsevierViewall">Ideally, a lens for dermatologic photography should be small and lightweight for ease of transport. It should have a short minimum focus distance (<<span class="elsevierStyleHsp" style=""></span>0.10<span class="elsevierStyleHsp" style=""></span>m), allowing detailed photographs to be taken of small skin lesions. It should also have an intermediate focal length (25-50<span class="elsevierStyleHsp" style=""></span>mm), which allows half-body shots to be taken without moving too far away from the subject but also allows for distortion-free macro photography. Another very important feature is the maximum magnification ratio, which must be at least 1× in order for a lens to be considered macro. Thus, the macro capability of a lens is determined by two fundamental characteristics: a short minimum focus distance and a high maximum magnification ratio.</p><p id="par0040" class="elsevierStylePara elsevierViewall">One macro lens option for mirrorless cameras is the Sony E 30<span class="elsevierStyleHsp" style=""></span>mm F3.5 Macro. This lens is compatible with all Sony E-mount cameras. It weighs 138<span class="elsevierStyleHsp" style=""></span>g and has relatively small dimensions (62<span class="elsevierStyleHsp" style=""></span>×<span class="elsevierStyleHsp" style=""></span>56<span class="elsevierStyleHsp" style=""></span>mm). It has a maximum aperture of 3.5 and a minimum aperture of 22.<a class="elsevierStyleCrossRefs" href="#bib0020"><span class="elsevierStyleSup">1–3</span></a> It has a minimum focus distance of 0.10<span class="elsevierStyleHsp" style=""></span>m and a focal length of 30<span class="elsevierStyleHsp" style=""></span>mm, adequate characteristics for dermatologic photography. The maximum magnification ratio of this lens is 1×. The absence of an image stabilizer is a disadvantage. This lens can be attached to a DermLite dermoscope using the well-known screw-on or magnetic systems.</p><p id="par0045" class="elsevierStylePara elsevierViewall">The Canon EF-M 28<span class="elsevierStyleHsp" style=""></span>mm F3.5 Macro IS STM lens (<a class="elsevierStyleCrossRef" href="#fig0005">Fig. 1</a>) is small (61<span class="elsevierStyleHsp" style=""></span>×<span class="elsevierStyleHsp" style=""></span>46<span class="elsevierStyleHsp" style=""></span>mm), lightweight (130<span class="elsevierStyleHsp" style=""></span>g), and compatible with all Canon cameras that have an EF-M lens mount (EOS M10, M3, M6, and M5). Like the Sony lens, it has a maximum aperture of 3.5 and a minimum aperture of 22–sufficient for the everyday needs of dermatologic photography.<a class="elsevierStyleCrossRefs" href="#bib0020"><span class="elsevierStyleSup">1–3</span></a> With a minimum focus distance of 0.09<span class="elsevierStyleHsp" style=""></span>m, the Canon lens is capable of taking macro photographs of small objects at a very short distance. It has a maximum magnification ratio of 1× or 1.2× (super macro). It has an image stabilizer, which is especially important when photographs are taken under poor lighting conditions or with slow shutter speeds (less than 1/60 of a second), which can lead to blurry or shaky images. It has a focal length of 28<span class="elsevierStyleHsp" style=""></span>mm, which allows panoramic photographs (of a patient's trunk or limbs) to be taken at a relatively short distance–an important feature for dermatologists who work in small examination rooms–but also allows for distortion-free macro photography (<a class="elsevierStyleCrossRef" href="#fig0010">Fig. 2</a>A).</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0050" class="elsevierStylePara elsevierViewall">Another novel aspect of the Canon lens is the adjustable light emitting diodes (LEDs) on the front of the lens (<a class="elsevierStyleCrossRef" href="#fig0005">Fig. 1</a>A). By providing additional lighting at the front of the lens, this feature prevents shadows from being cast by the body of the lens. It also provides adequate lighting for photographs of cavities or skin folds such as the mouth or anogenital area (<a class="elsevierStyleCrossRef" href="#fig0015">Fig. 3</a>). In addition, this lens can quickly be attached to a DermLite 4 (<a class="elsevierStyleCrossRef" href="#fig0005">Fig. 1</a>B) with no need for additional parts, allowing dermatologists to take high-quality dermoscopic photographs quickly and easily (<a class="elsevierStyleCrossRef" href="#fig0010">Fig. 2</a>B). It can also be attached to earlier DermLite models (DL2 HR Pro or DL2 Hybrid), thanks to screw-on or magnetic attachment methods that use the filter thread.</p><elsevierMultimedia ident="fig0015"></elsevierMultimedia><p id="par0055" class="elsevierStylePara elsevierViewall">Unfortunately, Nikon and Fujifilm currently do not offer small macro lenses for their mirrorless cameras (Nikon<span class="elsevierStyleHsp" style=""></span>1 and Fujifilm<span class="elsevierStyleHsp" style=""></span><span class="elsevierStyleSmallCaps">X</span> series).</p><p id="par0060" class="elsevierStylePara elsevierViewall">In summary, we present 2 lenses that are appropriate for dermatologic photography. Both of these small, versatile lenses stand out for their macro capability. The Canon lens also has a ring lighting feature and is easy to attach to a dermoscope.</p></span>" "pdfFichero" => "main.pdf" "tienePdf" => true "NotaPie" => array:1 [ 0 => array:2 [ "etiqueta" => "☆" "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Please cite this article as: Vilas Boas P. Objetivos macro para cámaras <span class="elsevierStyleItalic">mirrorless</span> en fotografía dermatológica. Actas Dermosifiliogr. 2018;109:379–380.</p>" ] ] "multimedia" => array:3 [ 0 => array:7 [ "identificador" => "fig0005" "etiqueta" => "Figure 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 844 "Ancho" => 750 "Tamanyo" => 126919 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Canon EF-M 28<span class="elsevierStyleHsp" style=""></span>mm F3.5 Macro IS STM lens. A,<span class="elsevierStyleHsp" style=""></span>Notice the light emitting diode system on the front of the lens. B,<span class="elsevierStyleHsp" style=""></span>The lens is easy to attach to a dermoscope.</p>" ] ] 1 => array:7 [ "identificador" => "fig0010" "etiqueta" => "Figure 2" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr2.jpeg" "Alto" => 844 "Ancho" => 750 "Tamanyo" => 123041 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Examples of photographs taken with the EF-M 28<span class="elsevierStyleHsp" style=""></span>mm F3.5 Macro IS STM lens. A,<span class="elsevierStyleHsp" style=""></span>Macro photograph taken at a short focal length. B,<span class="elsevierStyleHsp" style=""></span>Correctly centered dermoscopic image with no dark peripheral halo and no loss of field of view.</p>" ] ] 2 => array:7 [ "identificador" => "fig0015" "etiqueta" => "Figure 3" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr3.jpeg" "Alto" => 467 "Ancho" => 700 "Tamanyo" => 65064 ] ] "descripcion" => array:1 [ "en" => "<p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Photograph of the oral cavity taken with adequate lighting, which allows higher-quality photographs and faster focusing.</p>" ] ] ] "bibliografia" => array:2 [ "titulo" => "References" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "bibs0015" "bibliografiaReferencia" => array:3 [ 0 => array:3 [ "identificador" => "bib0020" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Standardized methods for photography in procedural dermatology using simple equipment" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:6 [ 0 => "D. 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| Year/Month | Html | Total | |
|---|---|---|---|
| 2024 November | 13 | 13 | 26 |
| 2024 October | 107 | 39 | 146 |
| 2024 September | 118 | 44 | 162 |
| 2024 August | 120 | 69 | 189 |
| 2024 July | 106 | 42 | 148 |
| 2024 June | 109 | 43 | 152 |
| 2024 May | 84 | 45 | 129 |
| 2024 April | 107 | 35 | 142 |
| 2024 March | 103 | 26 | 129 |
| 2024 February | 87 | 31 | 118 |
| 2024 January | 79 | 34 | 113 |
| 2023 December | 103 | 23 | 126 |
| 2023 November | 102 | 30 | 132 |
| 2023 October | 104 | 25 | 129 |
| 2023 September | 99 | 34 | 133 |
| 2023 August | 82 | 27 | 109 |
| 2023 July | 110 | 39 | 149 |
| 2023 June | 85 | 22 | 107 |
| 2023 May | 93 | 32 | 125 |
| 2023 April | 87 | 25 | 112 |
| 2023 March | 90 | 28 | 118 |
| 2023 February | 91 | 28 | 119 |
| 2023 January | 75 | 35 | 110 |
| 2022 December | 77 | 47 | 124 |
| 2022 November | 42 | 30 | 72 |
| 2022 October | 38 | 33 | 71 |
| 2022 September | 61 | 45 | 106 |
| 2022 August | 21 | 31 | 52 |
| 2022 July | 34 | 43 | 77 |
| 2022 June | 39 | 25 | 64 |
| 2022 May | 74 | 52 | 126 |
| 2022 April | 98 | 43 | 141 |
| 2022 March | 91 | 48 | 139 |
| 2022 February | 83 | 30 | 113 |
| 2022 January | 98 | 34 | 132 |
| 2021 December | 56 | 36 | 92 |
| 2021 November | 86 | 51 | 137 |
| 2021 October | 105 | 52 | 157 |
| 2021 September | 60 | 45 | 105 |
| 2021 August | 98 | 39 | 137 |
| 2021 July | 75 | 32 | 107 |
| 2021 June | 73 | 29 | 102 |
| 2021 May | 63 | 48 | 111 |
| 2021 April | 163 | 95 | 258 |
| 2021 March | 133 | 33 | 166 |
| 2021 February | 106 | 34 | 140 |
| 2021 January | 64 | 19 | 83 |
| 2020 December | 59 | 20 | 79 |
| 2020 November | 54 | 26 | 80 |
| 2020 October | 63 | 16 | 79 |
| 2020 September | 57 | 16 | 73 |
| 2020 August | 42 | 20 | 62 |
| 2020 July | 44 | 21 | 65 |
| 2020 June | 44 | 35 | 79 |
| 2020 May | 40 | 17 | 57 |
| 2020 April | 31 | 22 | 53 |
| 2020 March | 39 | 16 | 55 |
| 2020 February | 7 | 0 | 7 |
| 2020 January | 7 | 1 | 8 |
| 2019 December | 8 | 0 | 8 |
| 2019 November | 4 | 0 | 4 |
| 2019 September | 10 | 0 | 10 |
| 2019 August | 4 | 0 | 4 |
| 2019 July | 4 | 0 | 4 |
| 2019 June | 4 | 0 | 4 |
| 2019 May | 6 | 0 | 6 |
| 2019 April | 2 | 0 | 2 |
| 2019 March | 2 | 0 | 2 |
| 2019 February | 4 | 0 | 4 |
| 2018 December | 4 | 0 | 4 |
| 2018 November | 2 | 0 | 2 |
| 2018 October | 1 | 0 | 1 |
| 2018 September | 2 | 0 | 2 |
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