The School of Professional Photography offers retraining photo courses accredited by the Ministry of Education, Youth and Sports of the Czech Republic.In this article, we would like to bring you a simple overview of mirrorless camera and SLR bayonets that you may encounter with digital cameras.Unfortunately, in principle, it can no longer be easy, because the situation is too complicated for a brief overview.Nevertheless, we will try to make the overview as complicated as possible.If you have a camera with interchangeable lenses, you should know what lenses you can (and can't) attach to it.If you don't have such a camera yet, you may be wondering what the market is.And if you're a "photographic nerd" like me, you may only be interested in principle.The following is an overview for you / all of us.In the context of photography, this is called the system of attaching the interchangeable lens to the camera body.It is a mechanical or (today more often) mechanical-electronic interface, characteristic for a given type or brand of device.Together with other accessories for the brand (flashes, remote controls), they form a system.There are many of them on the market and they are not compatible with each other.Some systems are used by only one manufacturer (like Canon RF), others are open standards and are used by more manufacturers (like m4 / 3).The historic bayonets were purely mechanical, ie.transmission of aperture or other information (focusing distance) were transmitted to the body mechanically using various levers.Modern bayonets have the transmission of information and instructions electronically through a set of contacts (pins).Information about the type of lens, set focus, aperture, focusing motor, control information necessary for stabilization, motor zoom and other things are transmitted through them.Transit bayonets (Nikon F, Pentax K) then use a combined approach, as these are originally mechanical bayonets, to which electronic contacts were added continuously as needed.This is also why every system has them elsewhere (most often inside the bayonet at the top or bottom, but also in the metal bayonet sleeve itself, such as the Pentax K).Electronic bayonets without mechanical components have advantages in reliability, speed and quiet operation, but this does not mean that they are completely problem-free!Each change of the lens increases the risk of dust or moisture entering the camera, and especially the other does not do the electrical contacts well and sometimes it is necessary to clean them when the lens on the body starts to get angry.I was hesitant to include only "living" or even abandoned systems.I decided for the latter, because the market for used photography equipment is large and I can imagine that someone may be interested in acquiring, for example, a Sony SLT camera with an A-mount, although the manufacturer's support ended some time ago.Or does someone collect old digital devices, or are they just interested?On the contrary, I have decided not to get into the bayonets of medium-format digital systems, because those who are considering buying a digital medium-format probably do not need simple reports on the Internet, because they do so for a very good reason and after careful consideration.We start with mirrorless systems (called ILC, EVIL, mirrorless…) and connect with SLRs.The difference between SLRs and SLRs is that the former have an optical system between the bayonet and the sensor consisting of a mirror, a screen and a prism, which allows the presence of an optical TTL viewfinder, but increases the size and weight.SLRs do not have such a system and the bayonet is closer to the sensor, which reduces size and weight, but prevents the presence of a TTL optical viewfinder.They tend to have digital or none instead.Both types of cameras appear in a whole range of sensor sizes, typical sizes are 1 ", 4/3, APS-C, APS-H and FF.The smallest 1 "has a cropping factor of 2.7 × compared to film, so it is linearly 2.7 × smaller.The 4/3 system has a crop factor of 2 ×, APS-H 1.3 ×, APS-C 1.5 × or 1.6 × and FF (fullframe) 1 ×, so it is the same size as film (24 × 36mm).Even larger chips then fall under the aforementioned category of "medium format", which is missing in the overview.Simply put: the bigger the chip, the higher the image quality, but the more powerful the lens is needed and the larger the body size, the bigger the size.So is the price.So always think about the choice in the ratio of image quality / weight / price.Current systems are highlighted in bold, dead systems are highlighted in bold.A dead system is one for which the manufacturer has not specified any body or lens for many years, or has announced its termination.Even a dead system can theoretically wake up unexpectedly, but it's not common (I can only think of the arrival of the Sony a99II in 2016, when many people didn't count on the A-bayonet much, even though it wasn't officially closed at the time).If the system is used by more than one manufacturer, they are listed in parentheses;We have added several features to each system.The order is random, we put the active systems first.We have seen the compatibility of SLR lenses on mirrorless cameras in terms of official adapters, but know that there are also a number of unofficial ones (such as Canon EF SonyEF body lenses, etc.).Some even allow autofocus or aperture transfer, others do not transmit anything, so we did not pay more attention to them - the situation is a bit confusing.In general, however, there are adapters for almost any SLRs, especially for the use of old manual lenses, so they are more suitable than SLRs.As systems continue to disappear and new ones emerge, this article may not be relevant in the future.If you come up with missing or inaccurate information, write to the discussion so that we can update the article.You can also direct all your queries to individual systems there.If you opt for any system, it is a long-term investment;to buy a camera with interchangeable lenses and then stay with a single lens, especially a set lens, would be a pity and better services in such a case would quite possibly be done by an advanced compact with a non-interchangeable lens.Due to the fact that the prices of lenses are often considerable, we recommend that you study the reviews well.Also pay attention to the tests of SLRs and SLRs, on which you will eventually attach lenses!"One of the important parameters is the distance of the bayonet from the plane of the sensor. To ..." - show full comment... the opposite also arises.Thanks to the distance increased by that reduction, a certain combination will not focus on distant objects.Marked "infinity" on the lenses.Only when it comes to bayonets and "solved" reductions"... there is also the opposite problem. Due to the distance increased by that ..." - show full commentBut it will focus.The case of what AM describes (ie DSLR glass mounted via a mirrorless reduction) is not related to the problem of focusing at "infinity".Shorter "flange focal distance" SLR + reduction = exactly the greater distance needed to focus the DSLR lens on the SLR body.The problem with increasing the distance from the sensor due to reduction and focusing at infinity concerns the use of lenses for a bayonet with a shorter "flange focal distance" on a body with a larger "flange focal distance".E.g.Nikon DSLR with F-bayonet (flange focal distance = 46.5 mm) and lenses such as Helios etc. with M39 or M42 bayonet (flange focal distance = 45.2 or 45.6 mm).The small difference, in order to sharpen it into the distance and to the "infinite", can be compensated by reduction with an optical element."But it will sharpen. The case, which describes AM (ie DSLR glass deployed through the reduction ..." - show full commentI write "a certain combination".And because the article is about bayonets in general, I'm not just dealing with mirrorless cameras.So it's good to knowThe division of bayonets into mechanical and electronic is directly followed by the issue of lenses that are compatible with them.There are lenses that can be attached to the bayonet directly or through a reducer (another interesting topic), as well as lenses that have a bayonet compatible with the camera bayonet, but although the system uses an electronic bayonet, it is a manual lens that does not communicate with the camera body. / at least not in data, electronically /.This is followed by the problem of focusing with the lenses - and this again differs from bayonet to bayonet, or rather system to system and even device to device, although all these lenses are manual.And that is the second interesting topic.However, there are already hybrid lenses that communicate in part and are also partially controllable from the camera body - I use one.However, they do not allow autofocus and are therefore, according to historical custom, but in fact not entirely correct, classified as manual lenses.This is also an interesting topic for analysis.With reductions, it is always a greater or lesser compromise.The original Canon EF to R SLR reduction does work reasonably for SLR lenses.I used a Canon EF 100-400mm on a Canon R5 and sharpened accurately.Another thing is ergonomics.The Sigma MC-11 between Canon EF and Sony E doesn't work very well.The Canon EF 100-400mm will transfer aperture / time to my Sony A7Mark iii, but autofocus is virtually inoperative.Manual focus works very well, including peaking and 10x image magnification.You must be logged in to post comments.Comments on the article (6)Jakub Súkeník is a lecturer at FotoInstitut.cz, an editor at FotoAparát.cz and a professional photographer.He is the author of a number of technical articles, reviews and instructions that you can find here.Photography is also his biggest hobby.Photographing Aurora borealis or aurora borealis in Iceland.Iceland lies in the middle of the auroral arc of our planet, so it has a very good probability of aurora borealis visibility even with relatively weak solar wind gusts.I updated a seven-year-old article on aurora borealis photography with new photos and new insights on how to photograph aurora borealis.In this article, we would like to bring you a simple overview of the mirrors of mirrorless cameras and SLRs, with which you can“It was late evening - May Day - May evening - it was love time.Thus begins the well-known poem "May" by Karel Hynek Mácha."From time immemorial, people have made great efforts to ensure sufficient water.They sometimes built incredibly sophisticated structures to meet the need for water…"Everything around us is finally blooming.Everywhere we meet beautiful colors, colors.Our nature can enchant incredibly… Capture this beauty in your…Website design by WebToad sro