canon extension tube manual

canon extension tube manual

Einige Inhalte, wie z. B. Produktbeschreibungen, aktuelle Produkteinfuhrungen und einige technische Artikel, sind ebenfalls auf Deutsch, Spanisch, Franzosisch, Italienisch und Niederlandisch erhaltlich. Wahlen Sie in der Liste oben Ihre Sprache aus, damit samtliche darin verfugbaren Inhalte automatisch entsprechend Ihrer Wahl dargestellt werden. Ansonsten wird als Standardsprache Englisch verwendet. Choose your language from the list above and all content that is available in your language will automatically be displayed in your language, otherwise the default language will be English. Elija su idioma en la lista anterior y todo el contenido que este disponible en su idioma aparecera automaticamente en ese idioma, o, si no, en el idioma predeterminado que es el ingles. Une partie du contenu (comme les descriptions de produit, les lancements recents de produit et certains articles techniques) est egalement publie en allemand, en espagnol, en francais, en italien et en neerlandais. Choisissez la langue dans la liste ci-dessus, et tout le contenu offert dans votre langue s’affiche automatiquement; par defaut, le reste s’affiche en anglais. Alcuni contenuti come descrizioni di prodotto, lanci di prodotti recenti e alcuni articoli tecnici sono disponibili anche in tedesco, spagnolo, francese, italiano e olandese. Seleziona la lingua dall'elenco in alto e automaticamente si visualizzeranno tutti i contenuti disponibili in quella lingua; diversamente la lingua di default sara l’inglese. Bepaalde inhoud, zoals productbeschrijvingen, onlangs gelanceerde producten en sommige technische artikelen, zijn ook beschikbaar in het Duits, Spaans, Frans, Italiaans en Nederlands. Kies de taal uit bovenstaande lijst, waarna alle inhoud die beschikbaar is in de gewenste taal, automatisch in die taal wordt weergegeven. Anders is Engels de standaardtaal. Or to put it another way, the lens moves away from the camera as the subject moves nearer to the lens.http://licorne-hotel-restaurant.com/userfiles/calamp-manuals.xml

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(Some lenses have a feature called internal focusing. Here, the elements move back and forth within the barrel, but the length of the lens does not change.)This focusing distance varies considerably from lens to lens, from 0.2m for the EF15mm, to 14m for the EF1,200mm. But the magnification of the subject (actually a reduction) stays within a narrower range, from about 0.1x to 0.3x.Partly because it costs more to design and manufacture lenses with longer extensions; partly because it is difficult to design a lens that gives high-performance results over a wide range of focusing distances.The EF100mm, EF180mm and EF-S60mm macro lenses focus all the way from infinity down to a distance that gives 1x (life-size) magnification. If you use these lenses, you will find that the length changes considerably from one end of the focusing range to the other. (There is also an EF50mm Macro lens, but this requires the use of a life-size converter to give life-size magnification.)All you need is an extension tube. This fits between the camera and the lens.It is possible to attach the EF12 tube to the EF25 tube to give a 37mm extension. Canon does not recommend this, as the data transfer may be affected, but acceptable results are possible if you are willing to experiment.With no optical elements, little improvement is possible and so there was no need to bring out new versions.In addition to accepting all the past and current EF lenses, it also takes the EF-S lenses. These lenses do not fit the original EF extension tubes.These can be used with EF-S lenses, as well as most EF lenses. And that’s the only difference. If you have the old tubes and do not use EF-S lenses, there is no need to upgrade.The instruction leaflet gives some guidance on this, but the best advice is to shoot some test frames with the camera and lens you intend to use and make a note of any exposure compensation that may be required. Keep this information safe for future reference.Privacy statement.http://dermalab.pl/userfiles/calc-solutions-manual.xml

What Is an Extension Tube. An extension tube is a spacer that sits between your lens and the camera body to alter the MFD (minimum focus distance). The MFD of a lens is a measurement of the closest point a subject can be from the camera’s sensor, whilst still being able to focus. If a subject is closer to the sensor than a lens’ MFD, you cannot focus on that subject. The thicker the extension tube used on a lens, the higher the lens magnification becomes as you’re able to move the lens much closer and still achieve focus. What all this means is that you can turn a normal lens into something with much a much higher magnification factor to achieve macro-like images, without needing a dedicated macro lens. Later in the article I will discuss the knock-on image quality issues caused by extension tubes, but the other important thing to realise is that when extension tubes are in place, you can no longer focus all the way to infinity. This has few practical implications because most people are using extension tubes to try to focus on something at a very close distance, but it’s worth knowing so that you don’t think your lens is broken when you find it’s no longer able to focus on something further than a few feet away. It’s for this reason that you can’t practically leave an extension tube in place all the time, so it’s something you need to carry in your bag and use when it makes sense to do so. How Do Extension Tubes Affect Image Quality. Unlike teleconverters, extension tubes have no optics in them at all so in some circumstances they have very little effect on image quality. The tricky thing about point is that every lens reacts very differently to using extension tubes, so it’s hard to deliver a sweeping answer to this question. When manufacturers design the optics inside a lens, they take into account things like barrel distortion and pincushion distortion, and try to correct for it as much as possible.

Focusing a lens does move the optics inside a lens, so that means that the amount of distortion varies depending on how far away your subject is from the lens. Lens designers try as hard as they can to correct for distortion at the most important points in a lens’ focus range, but essentially what it means is that some lenses are sharper than others when they are used at the minimum focus distance. Take a macro lens for example; The designers know that it’s going to spend much of its time being focussed at the absolute closest focus point, so they correct distortions for that point. Often a macro lens is at its absolute sharpest when used at the MFD. Conversely, super telephoto lenses tend to be used for focussing on objects that are quite some distance from the lens, so the opposite is true. What all this means is that every lens performs differently at the MFD, and you can’t necessarily trust that an expensive, well regarded lens is going to be super sharp at the MFD. Extension tubes have the effect of magnifying these imperfections on the sensor, so if you start with a lens that performs poorly at the MFD, you’re going to notice it pretty quickly once you start using the tubes. The “nifty fifty” actually performed much better in terms of overall sharpness with extreme extension. Close examination of my 24-70 images showed considerable distortion and loss of fine detail. I would regard this very same lens to be one of the sharpest Canon have ever made, so it just goes to show that not all lenses take well to being operated outside of their designed parameters. For many people, the whole point of using extension tubes is so that you don’t have to buy a new (macro) lens, meaning you’ll most likely have to use whatever lenses you already have. After purchasing the extension tubes though, make sure to test them out on all your lenses to figure out which ones respond best to this kind of usage.

If you find a particularly great combination, please do share it in the comments at the bottom of this article as well. The other side effect of extension tubes is that they can cause vignetting when used on lenses that are set at, or close to, their widest aperture. The amount of vignetting is somewhat dependant on the lens, but also very dependant on the thickness of the tubes you are using. 12mm extension tubes rarely prove to be much of an issue in this regard, but once you start getting into the 20mm or greater thicknesses, you’ll want to pay attention to this, and stop your lens down to counteract it. Extension Tubes and Effective F-stop The other thing you’ll notice if you are manually exposing your images is that there is significant overall light loss when extension tubes are used. This occurs universally across the image, so it’s distinct from the previously mentioned vignetting. The process of shifting the lens further away from the sensor actually increases the aperture of the lens, so your image gets darker and your depth of field will increase just as if you had changed the aperture setting of the lens via the dial on your camera. The difference is that this change in aperture isn’t actually shown on the camera, because the camera doesn’t know how much you have extended the lens. If you aren’t deeply familiar with f-stops then I’d recommend brushing up by reading my Understanding F-Stops article. The important point that’s hidden within that previous article is that “The diameter of an aperture is equal to the focal length, divided by the f-number”. This means that f-stop is directly related to the focal length and since focal length is related to various dimensions in the lens design, extension tubes also change the effective focal length of a lens when you add them, and this in-turn causes a change in effective f-stop.

In practice, you probably wouldn’t notice it if your camera was set to some sort of automatic exposure mode because the camera will compensate for it. What you should remember, as a rule of thumb, is that by the time you get close to magnifications of 1:1, the effective f-stop of the lens will have changed by about 2 stops. That means you, or your camera, are needing to compensate for this with a higher ISO, or a shutter speed that’s 4-times longer than you’d need without those tubes. It could make the difference between being able to hand-hold the lens, or not. And it could also make the difference between being able to get a sharp shot of a small moving subject, or not. In low light, if you are struggling to get the exposure settings required for a sharp shot, then it might be a good idea to use a shorter extension tube to gain back some of that lost light, and therefore maintain a faster shutter speed. Another consequence of altering the f-stop of a lens in this way is that less light is getting to the camera’s AF sensor, so you may find that in low light, AF performance is decreased when using extension tubes. Most people tend to use extension tubes with static subjects so you can always tun on live view and focus manually, but it’s another thing you should be aware of. This light loss will occur with any brand of extension tube as it’s simply a mathematical function, so that change in AF performance isn’t linked to the brand of extension tube in any way. Calculating The Change In Magnification from an Extension Tube The magnification of your existing lens can usually be found in the lens specifications from a manufacturers website. Calculating the Change in Minimum Focus Distance from an Extension Tube -Added July 2017 When I first published this post I didn’t delve into the mathematics of calculating the new MFD of a lens when the extension tube is in place.

It’s a bit more involved than the change in magnification and I thought most people would gloss over it. I did receive a comment asking how to calculate this though, so if you are particularly interested then you can go to a separate (and quite in-depth) tutorial that will walk you through the math for figuring out your new theoretical MFD when using an extension tube. Extension Tube Examples In order to demonstrate how these tubes work, I set up a test subject and then photographed it with several different lenses, both with and without extension tubes. Note that each time a new photo was taken, the camera has been physically moved closer to the subject. The tubes themselves do not “zoom in” in the same way that a teleconverter would do. For these examples I’m using Canon EF lenses because that is the system I was shooting with at the time this guide was created. You can of course get extension tubes for all other systems such as Fuji X, Canon RF, Nikon Z, Sony E-mount and Nikon F-Mount. You can expect the same kinds of results with whatever system you are using, so don’t get too hung up on the actual lens that is being used in the examples. Instead, concentrate more on the type of lens: Telephoto zoom, medium zoom, pancake prime and standard prime. You almost certainly own some lenses like these yourself, so think about how you could expand their usefulness using simple extension tubes in the same way. In general, 50mm prime lenses are great options for extension tube usage, so if you’re not a Canon user, be sure to check out the equivalent lens for Nikon, Sony, Fuji or whatever brand you use. With 36mm of extension tube, this is how close you can focus using this particular lens. I performed the same test as with the previous two lenses, but ran into troubles when attempting to use 25mm tube. The problem is that the minimum focus distance is a measurement from the camera’s sensor and NOT the front element of the lens.

That means that with physically longer lenses, particularly ones that extend while zooming like this one, you can actually reach the point where the MFD is inside the lens and you can never focus at that point. Of course you could move the subject back away from the lens, but then you might as well not bother with the extra extension tube at that point. The other problem is the physical proximity of the subject to the lens. The lens eventually blocks light from falling on your subject, and if you’re trying to shoot small insects, good luck getting a lens this close to them. Compare these images to those from the first example of the 50mm lens, and you’ll see that the difference in subject size varies much more greatly with shorter focal lengths. For the 50mm lens there is a drastic difference between what you can capture with the native 50mm and what you can capture with the 37mm of extension tubes. The same can’t really be said for that on this longer focal length zoom. Yes, there is a noticeable difference, but it’s not what I would call drastic, so it’s worth understanding this difference as you get into longer focal lengths. Despite the 100-400 lens having an admirably short MFD for a 400mm lens, the end result isn’t nearly as “macro like” as the results you get with the shorter prime lenses. For this reason, many people choose to use a close-up lens with longer focal length lenses, rather than using extension tubes. Extension tubes work best for adapting short focal lengths, close-up lenses work best for adapting longer focal lengths. Of course one advantage this longer focal length setup does have is that you aren’t so close to the subject, making it a good option for small animals and insects where a closer presence could cause them to flee. OEM Extension Tubes These are the most expensive kinds of extension tubes and they are manufactured by the manufacturer of your camera, like Canon, Nikon, Sony or Fuji.

They allow full autofocus when used with compatible lenses, and you can communicate with the lens via the camera in order to change the aperture or engage image stabilization. Third-Party Extension Tubes (with AF) Third-party tubes are any ones that are not made by the manufacturer of your camera or lens. Popular third party extension tube manufacturers include Kenko, Vello and Neewer, the most popular ones being the Kenko tubes. I’ve previously written a direct comparison between the Canon extension tubes and the Kenko extension tubes. When it comes to buying lenses, many people really prefer to buy the ones that are made by the brand that makes their camera, and in many cases (but not all), these do tend to be of a higher quality. Since extension tubes are really just spacers, and contain no optical elements, it’s much easier for third-party manufacturers to make competitive, quality products. They are always much cheaper than OEM tubes, typically 50% of the cost or less. As you can see in the comparison between the Canon and Kenko tubes below, it’s very hard to tell them apart. These kinds of tubes do not have any electronic contacts in the mount, so you can’t autofocus with the lens, and you can’t even adjust your aperture because the camera has no way of communicating with the lens. How to Change Your Aperture When Using Manual Extension Tubes In order to adjust the aperture when using these contactless, cheaper extension tubes, you must follow this procedure: Mount the lens directly on the camera In aperture priority or manual mode, select the aperture you want to use in your image Hold down the DOF preview button on the camera. This causes the aperture to engage to the chosen value Whilst holding the DOF preview button, remove the lens from the camera.

This causes the aperture to stick at the requested value Mount your extension tubes to the lens Connect the whole lot to the camera body again As you can see, this is a real pain in the butt to have to go through this process every time you want to change your aperture value. My first set of extension tubes was just such a set, and I think I used them once before deciding to buy some that included electronic contacts instead. Which Kind of Extension Tubes Should You Buy. I have to be honest and say that I do not think the fully manual, contactless, super cheap extension tubes are worth the hassle at all. I tried them and hated the experience. They may be ludicrously cheap, but since the third-party AF compatible ones aren’t even that expensive, I really would recommend saving up for them, or the OEM ones. So what about choosing between the OEM or the third-party ones. It’s hard to make a sweeping statement in that regard because I haven’t used all the third-party ones that are available. I tested the Kenko ones and came away much more impressed than I expected to be, but I still choose to own the OEM Canon ones myself. If I think there is even a 1% chance that the Canon ones are stronger or more reliably built than then third-party ones, it makes sense for me to use the Canon ones. In the grand scheme of things, the price difference is a tiny fraction of the cost of my lenses. Having said that, for most people I do think that good third-party ones like the Kenko set are the best option. There’s certainly no difference in performance between those ones and the Canon ones. My choice to use the Canon’s is specific to the lenses I’m using them with, but I would be much more inclined towards the third-party ones if I was just using smaller, cheaper prime lenses with them. I think the Kenkos, or similar third-party ones are probably the right choice for 95% of people out there.

Look for Light Leaks Sometimes with cheaper extension tubes stacked together, it’s possible for a small amount of light to creep into the tubes where they are joined together. If you experience areas of low contrast in your image, or odd looking bright sports or artifacts, this could be the problem. It’s easily solved by using some black electrical tape around the joins in the tube stack. Using Extension Tubes to Stack Extenders Another useful way to use extenders is to use them for stacking together two extenders that will not natively connect due to protruding optical elements. For example, as you can see in the photo below, Canon’s extenders have an optical protrusion that would physically prevent them from connecting directly to a lens that has a rear element close to the mount. By using a 12mm extension tube between them, they will connect without a problem. It’s also a very convenient way to store multiple extenders in your camera bag. Here you can see exactly why the extension tube is necessary. The protrusion from one extender would otherwise easily touch against the rear element of the other one, preventing them from coupling. If you like nature photography then they can come in very handy for photographing small animals or plants, and if you’re a travel photographer than they are great for picking up detail shots of food using your existing travel zoom lens, or a fast prime. There are very few photography accessories out there that can make such a vast difference to an image for such a small amount of money. When you take into consideration the fact that they also weigh very little, making them easy to carry, you can see why I’m always recommending them to people. Extension Tube Advantages Cheaper than buying a dedicated macro lens. Light weight and easy to pack compared to carrying a dedicated macro lens. Often minimal loss in quality due to lack of optical elements. Stackable to provide magnification options depending on your subject.

Extension Tube Disadvantages A lens can’t focus at infinity with an extension tube on it. Minimal effect to magnification on longer focal lengths. Can cause vignetting at wide apertures and stack heights. Increases the effective f-stop of the lens, thereby requiring a longer shutter speed or higher ISO to compensate. Cool Story From a Reader I recently received a really great email from a reader, Lynda Chan, that related to this specific extension tube guide, so I asked her for permission to share it here with future readers because I think it’s a wonderful story, and great inspiration. Hi Dan, A while ago, you did an article on extension tubes, and I was quite interested, since I had been thinking about macro. I got it, and fooled around with it a bit, and liked it. Tonight, I came home: “Kids, here’s your frozen pizza. Here it is, handheld, manual focus, kid-held-flashlight lit ?? I was pretty excited about this one, and sure wouldn’t have got this shot if I hadn’t read your review on these ?? Thank you so much, Dan! ??? You may like Canon Vs. His editorial work has been featured in publications all over the world, and his commercial clients include brands such as Nike, Apple, Adobe and Red Bull. Dan is also the President of the First Light Image Festival. 40 Comments Shabbir on July 22, 2016 at 10:45 am Hi Dan, Great post. I had actually never heard of extension tubes before and I’d just fudge around trying to find the right focal distance to take a sharp macro picture. I’d take it at a really high resolution, and start cropping in Photoshop. Very amateur, but hey. I should look into extension tubes. Thanks! Reply Dan Carr on July 23, 2016 at 11:28 pm Thanks. Yeah they are such a cost-effective way to get into macro photography. Definitely worth checking them out. Glad I was able to introduce you to something new, Shabbir. Thanks very much for sharing your work and for the time you invested.

Jerry Reply Dan Carr on May 10, 2017 at 2:59 am You’re very welcome, Jerry. Glad you found them useful. Reply Matt on July 19, 2017 at 12:20 am Hi Dan, Thanks so much for the great article. Really informative and easily accessible for the amateurs like me. I’m just wondering if you have any experience or knowledge of using extension tubes with a dedicated macro lens. This wasn’t something you touched on in your post, but I have come across mention of it elsewhere online and I just wondered what your take on it would be. Best wishes, Matt Reply Dan Carr on July 19, 2017 at 2:41 pm You’re welcome, Matt.There’s no reason why you couldn’t do that, I just think it would not be necessary for most people unless you are really focussing on tiny tiny creatures like a fly or an ant or something like that. All it would do is to give your macro lens an even closer focussing capability. Reply Brian Sullivan on July 21, 2017 at 10:59 pm Dan, thanks for the article. How would you go about calculating the new minimal focusing distance when extenders are inserted. Appreciate you put the formula for the new magnification.What I’m going to do is write a brand new post about this topic, so look out for it shortly on the front page of the site. Reply Dan Carr on August 1, 2017 at 7:56 pm Brian, I have now completed this new article here: I hope you find it useful, it wasn’t the work of a moment haha, Give it a share if you can, it really helps me out ?? Reply REBECCA brogan on August 12, 2017 at 2:51 am Thank you so much, Dan, for this well written and informative article. I read some reviews on cheaper, third party extension tubes that said they had trouble disconnecting them. Others said even the weight of the lens with the Canon extension tubes caused the lens (and therefore optics) to “sag” slightly and result in a blurrier image (which could be corrected by physically supporting the lens). Have you heard of any more risky things one should consider with cheaper extension tubes.

Are there any brands that are most trustworthy for solid manufacturing, in your experience. I do landscape photography and carry a pack half my body weight, so fitting another large lens into my pack is the last thing you want to do. Every direction you point your camera is photogenic. If the pin doesn’t engage, the lens could drop off the camera entirely. I have not had this happen (fall), although with another accessory I have had it so that the pin did not engage. Kenko is a solid brand for third party tubes, these are in some of the photos on this page. If you are concerned, I would go with them, or the official Canon ones. How amazing that you live in Tasmania. I have actually been thinking about coming over to hike to Cradle mountain and photograph that area. Have you been? Reply Rebecca brogan on August 15, 2017 at 1:16 am Thank you so much for this, Dan. I really appreciate the free, articulate and solid advice. I think I’ll probably go with Kenko. Yes, I go bushwalking and backpacking frequently here in Tasmania, and I’ve gotten into landscape photography the last few years because it’s so gorgeous here. And, yes, I’ve been to Cradle lots of times. Here is a photo I took of Cradle Mtn from Dove Lake a little over a year ago: Here is another link to my Tasmanian Wilderness Landscape Photography Series (I’m a full time professional Christian artist; photography is a relatively new thing I’m taking on). If you ever come down I’d be more than happy to tell you some of the best places to go for landscape photography, which aren’t always on the tourist map. You’ve got my email. The second best time is probably in March or April cuz we aren’t into the cold, winter yet and the weather is most stable. God bless and thanks again. Reply Dan Carr on August 17, 2017 at 9:09 am Wonderful. Thanks for the links, Rebecca. And the kind offer for help. Really appreciate it ??

Reply Steve Hewitt on August 20, 2017 at 7:18 am Hi Dan First, thank you for your informative article. I have used extension tubes with a 70mm macro lens in the past, with fair results. Since recently buying a 300mm lens for dragonflies and damselflies, I wondered about using extension tubes to increase the magnification and after reading your article I started experimenting. The results appear to be promising, though my comparisons so far have been shots of a piece of kitchen paper, torn to length at about 40mm (the length of a typical damselfy in the UK) since the weather today is probably too cloudy and breezy to be a good day for these insects. The torn fibres are useful in imitating the hairy details of my eventual targets. With no extension, the 300mm lens has a minimum focus distance of about 1100mm (to front of lens) giving an image 43% of the width of a Pentax APS-C sensor. With 52mm of extension, the minimum focus distance is about 700mm giving an image 85% of the sensor width. In the past I have had to get much closer to the subject with a macro lens to almost fill the frame like this and of course that can make the insects nervous. By the way, my two extension tubes (26mm each) are second-hand 2x teleconverters with the glass removed, so I can still control the aperture from the camera and they didn’t cost much. Thanks again for inspiring me to try this. Best regards Steve Hewitt Reply Dan Carr on August 20, 2017 at 10:44 pm You’re welcome. I’ve never heard of extenders with the glass removed. What a fascinating idea.Thanks for sharing this. Hope your photos of the damselfly work out. Would love to see one when you get it, send me a link ?? Reply Steve Hewitt on August 21, 2017 at 12:16 pm Lenses eh? Oh well. Despite the continuing cloudy weather, I tried the 52mm extension today and discovered that the maximum focal length is now something less than two metres, so it isn’t the all-round solution I was hoping for.