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Started by Hugh Weaver
Wed, 02 Jun 2010 20:49
Macro Photography - Top Tips and Techniques
Author: Hugh Weaver
Date: Wed, 02 Jun 2010 20:49
Date: Wed, 02 Jun 2010 20:49
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8139 bytes
Apart from landscape photography I also have a passion for macro photography too. It is such a diverse subject and covers such a wide variety of topics that there will be something that will appeal to every photographer out there. The great thing about this subject is that it can be practised easily indoors at home so you are not always relying on the weather as you are with landscape photography. I want to share with you some of the tips I have learned through practice and trial and error so that you can avoid some frustration and making the same mistakes I did. I will first briefly cover equipment and then focus (excuse the pun!) on the various techniques that I use. Equipment Close up lenses - This is by far the cheapest option but also offers the poorest optical quality. If you are unsure about whether you will do macro photography on a regular basis then this is a good way of finding out. These lenses are usually very cheap at around '20.00 or $30.00 and normally come in sets of three. They simply screw onto the end of your lens like normal filters do and are like putting a magnifying glass in front of the lens. Extension tubes - A bit more expensive for generic ones and alot more expensive for branded ones, and in some cases they can cost as much as a mid range lens! These are simply tubes that sit between the camera body and the lens increasing the minimum focusing distance of your lens. Again these also normally come in sets of three to allow you to choose the amount of magnification you are getting. The electrical contacts may also be present to allow the autofocus on your lens to still operate, but in the majority of cases autofocus has a really hard time with macro subjects so manual focusing is the preferred option. There are two main advantages with extension tubes over close up lenses: 1. Optical quality is solely down to the lens you are using since there are no lenses or glass in the extension tube. 2. Massive magnification can be achieved, even more so than with a dedicated macro lens. Dedicated Macro Lens - If you are serious about your macro photography then this is the way to go. A good dedicated macro lens should give at least a 1:1 ratio meaning that objects will appear life size on the sensor, will focus down to only a few centimeters and offer excellent optical quality and fast apertures particularly if it is a prime (fixed focal length) lens. Of course dedicated macro lenses are not only just for macro photography, they also make excellent portrait lenses and good short range telephoto lenses on the longer focal length ones. Remote release - For all the above methods I would highly recommend that you invest in some sort of remote release, either cable or wireless. With the high magnifications your are shooting at pressing the shutter release button can be enough to introduce camera shake and ruin the shot. A cable release can be bought for only a few pounds or dollars so there is really no excuse for not having one! Focusing Due to the small distances involved and very narrow depth of field I would only recommend that you only ever use manual focusing. Autofocus can work to a degree but you will only get frustrated as the autofocus locks, unlocks, hunts, locks, unlocks, hunts...... you get the idea! Also due to the extremely narrow depth of field at short distances the autofocus may look like it has locked where you want it. It is not until you look at the image on your computer that you see that it actually locked slightly in front or behind where you wanted it! If you are shooting outdoors and it is not too windy then I would suggest using a tripod and enabling live view on your camera. Live view is a real godsend for macro. It can be difficult to tell through the view finder alone if you are correctly focused, so I usually enable live view then zoom in, then readjust the focus. It is amazing how many times you think you have the focus spot on until you enable live view and zoom in only to see it is off slightly! I would also recommend that you use mirror lockup to minimise any vibrations from the mirror swinging up out the way when you are actually taking the shot. If you are shooting indoors and you are using a Canon camera then I highly recommend you make use of the utility remote control software that comes with it. This allows you to use the PC or Mac screen as live view with real time aperture preview, zoom and shooting! An excellent tool for the macro or still life photographer! Other camera manufacturers also offer this feature so check yours for details. In situations where a tripod and/or live view is not suitable such as outdoors in less than calm conditions and where you need to use higher shutter speeds, you can use the rocking method for focusing. This is done by roughly setting the focus manually then you rock backwards and forwards gently while looking through the view finder until you think you have sharp focus. A good tip here is to put your camera in to high speed shooting mode then fire off a few frames as you move backwards and forwards. A kind of rough a ready focus bracketing! I use this method frequently and it ensures you get at least one sharp image from each burst of shots. Depth of Field The amount of depth of field available to you at close focusing distances is extremely limited compared to what you have with other forms of photography. At fast apertures of f2.8 you may only have a couple of millimeters and even at f16 this may only extend to a centimeter or two depending on how close you are and the level of magnification used. A word of warning here, do not be tempted to use apertures over f16 to extend the depth of field. Diffraction of light at small apertures still applies to macro photography as it does to landscape photography. Image sharpness in macro images is of upmost importance, some say even more so that in landscape images so it is not worth compromising your images in this way. Filters When it comes to filters for macro photography, apart from a skylight or UV filter which I keep on all my lenses all the time for protection, the only filter I use frequently is a polarising filter. As in landscape photography these will deepen and saturate colors particularly if you shoot outdoors on sunny says. They will also remove reflections from non-metallic surfaces so if you are shooting wet or dew covered objects or water droplets and you want to keep the reflections in these then do not use the polariser! You also need to remember that using the polariser will also reduce your shutter speed by one or two stops so make sure its use is not making your shutter speed too low if you are shooting handheld. One last point - a polarising filter is the only filter that cannot be simulated in Photoshop! The Fastest Way To Master Photoshop - http://www.photoshopoed.tk/
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