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SUMMARY:5 key points to know when choosing a cine lens - Speaker to be con
 firmed
DTSTART:20210904T100000Z
DTEND:20210904T110000Z
UID:TALK161854@talks.cam.ac.uk
CONTACT:SimonJT - deleted
DESCRIPTION:When we start taking pictures\, we soon realize how important 
 it is to choose the right lens to accompany us in every situation. Among a
 ll the elements of our equipment\, it is the cine lens that will be the st
 ar\, we will spend the most time on it and even to choose it\, we will pul
 l out some hair...\n\n\nYou have to know which one to buy since it is not 
 exactly one of the most economical photo accessories to put in your backpa
 ck.\n\nAnd it will be just as decisive in providing quality and character 
 to our images. Given all this\, what are the elements to consider before b
 uying one? We present here the 5 key points to choose your lens.\n!https:/
 /www.redsharknews.com/hs-fs/hubfs/Imported_Blog_Media/a0befb32ce37107c42a1
 c464fa27a8de-1.jpg?width=1280&height=720&name=a0befb32ce37107c42a1c464fa27
 a8de-1.jpg!\n*1. Compatibility of the lens with my camera*\n\nChoosing a c
 ine lens that is compatible with your camera may seem obvious but it is no
 t that obvious. Many "photography enthusiasts":https://thephotographyenthu
 siast.com/\n who are just starting out often get caught up in a maze of tr
 ying to find the compatibility of the lens they want for their camera.\n\n
 _The brand_\n\nYou may well have already clearly chosen the brand. If\, fo
 r example\, your camera is a Canon\, then you will need an original Canon 
 lens or a compatible cine lens\, such as DZOFILM\, Tamron\, Samyang\, Sigm
 a... That is to say the brands that design lenses compatible with the most
  popular camera mounts on the market. So far\, nothing complicated: an ori
 ginal lens or a lens compatible with your camera brand.\n\n_The mount_\n\n
 On the other hand\, you need to know which mount it is: Canon EOS or Canon
  M? Let's suppose you have a Canon EOS 1200D camera\, you now know the bra
 nd and the mount (Canon EOS) but what about the sensor?\n\n_The sensor_\n\
 nWe must also ensure compatibility with the sensor. If we take the example
  of the Canon EOS 1200D camera\, we will then be dealing with a camera wit
 h an APS-C sensor. A lens designed for cameras with a Full Frame sensor ca
 n therefore serve you\, as well as a lens for cameras with an APS-C sensor
 . Click here to learn more about sensors.\n\nBut beware: if you are lucky 
 enough to have a Full Frame camera\, you will not be able to mount it on a
  lens designed for APS-C cameras because of two things: either it will not
  be possible to install it because of the design since it may clash with t
 he camera mirror or simply\, if you manage to install it\, you will get im
 ages with vignetting.\n\nThis is because the amount of light that the lens
  can transmit is less than that of the sensor\, so there will be parts of 
 the image without information\, without light (the edges). If we apply thi
 s combination\, we can obtain something like the image below:\n\nAs mentio
 ned\, the reverse does not happen: a lens designed for Full Frame sensors 
 will get enough light to an APS-C sensor. The only drawback is that you wi
 ll lose information on the way and it would be a shame to invest in a Full
  Frame lens (more expensive) if it is not to be able to take advantage of 
 it ...\n\nBut with an FF lens\, you will always have the assurance of know
 ing that you can always use it on APS-C as well as Full Frame cameras if y
 ou have several. And you will be able to switch from one to the other with
 out any problem.\n\n*2. The focal length of the lens*\n\nThe compatibility
  of the lens with your camera is the first step and the second is clear: w
 hat focal length to choose? Cameras usually come with a short zoom lens in
  the basic packages. You can decide to upgrade to a zoom lens with a longe
 r focal range or take the plunge into fixed focal lengths. What do you thi
 nk?\n\n_Zoom lens vs. fixed lens_\nShould I choose a zoom lens or a fixed 
 lens? There are two known principles here: zoom lenses are generally more 
 versatile and convenient to use\, while fixed focal length lenses are char
 acterized by better optical quality.\n\nOn the other hand\, fixed lenses a
 re well known to better "train" photographers by forcing them to move arou
 nd\, in addition to giving unity to the angle of view if you are doing a p
 hoto series. This step is a very personal decision\, many photographers us
 ually have both options on their equipment and choose one or the other dep
 ending on the specific situation they will be facing.\n\n_Wide angle\, tel
 ephoto... ?_\n\nWe can also look at it from another angle: what kind of pi
 cture do I like to take? In other words\, choose the focal length accordin
 g to the main use you are going to make of it (it is not the same thing to
  make landscape as portrait\, in the same way that the choice will be diff
 erent if we talk about nature or studio photography).\n\nSo whether it's a
  zoom or a fixed lens\, you'll know what type of lens you're going to choo
 se among the different possibilities: fish eye\, wide angle\, standard\, t
 elephoto or super telephoto.\n\nNot sure which focal length is ideal for e
 ach case? No problem: take a look at the article where we explain everythi
 ng about focal lengths and their uses\, then come back here so that we can
  see together the other key points to take into account when choosing a ci
 ne lens.\n\n*3. The diaphragm\, an important element of the lens*\n\nAnoth
 er element that will largely influence the result of your photos and espec
 ially that of some specific types of photos\, such as social photography\,
  night photography and portraiture\, is the maximum aperture. This subtle 
 fact is decisive in the play of depth of field and brightness of the image
 .\n\n_Maximum aperture_\n\nThe "DZOfilm cine lenses":https://www.dzofilm.c
 om/ with maximum apertures greater than or equal to f/2.8 are called "brig
 ht lenses" because they allow more light to pass through the sensor\, but 
 they are also known as "fast lenses" because by opening the aperture wider
 \, you will have a greater shutter speed range.\n\nA bright lens can help 
 you in low light situations\, such as night scenes or interiors\, but also
  to achieve images with a shallow depth of field\, which is quite useful a
 nd striking in some specific cases\, such as portraits and foregrounds.\n\
 n_The number of aperture blades_\n\nAnother aspect to take into account wi
 th regard to the diaphragm is the number of blades that compose it. In the
 ory\, it is said that the more blades\, the better. Why? Because the quali
 ty of the bokeh is improved\, since the blur is produced by defragmentatio
 ns of light in perfect circles\, unlike a diaphragm with few blades.\n\nTo
  obtain an almost perfect circle\, we will mention diaphragms with at leas
 t 9 blades in their construction. Of course\, this characteristic of the l
 ens rightly increases its cost.\n\n*4. Does the lens have an image stabili
 zer?*\n\nNow we come to another important point in choosing a cine lens\, 
 namely whether it has an image stabilizer or not. This system consists of 
 a set of lenses added that corrects the movement. You can even use up to 4
  or 5 slower shutter stops without blurring the image. This is a real adva
 ntage when you find yourself in low light situations and you want to compe
 nsate for this by extending the exposure time.\n\nNikon calls this system 
 IS (Image Stabilizer) while Canon calls it VR (Vibration Reduction). As fo
 r Tamron\, it has chosen the name VC (Vibration Compensation). Be aware th
 at you will have to face a higher budget if you decide for a cine lens wit
 h an image stabilizer.\n\nIf you choose a lens without image stabilizer an
 d you face situations where you have to use shutter speeds slower than 1/6
 0\, then it is better to use a tripod but this is a "problem" that has a s
 olution anyway...\n\n*5. Other specificities of the lens*\n\nIn addition t
 o the aspects already mentioned\, lenses have other elements that may be i
 mportant in your purchase decision. I have presented the most general elem
 ents\, which are important for almost all types of photography\, but what 
 about if you want to practice a certain discipline?\n\nIf you want to take
  pictures of flowers or insects\, for example\, you will probably be inter
 ested in a lens with a macro function and a very short minimum focusing di
 stance. And if\, on the other hand\, you want to shoot video\, then you'll
  be looking for a cine lens with a quiet focus motor or even a smooth and 
 quiet aperture transition and integrated gear rings to accommodate a follo
 w focus system.
LOCATION:Venue to be confirmed
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