Encyclopedia of photography circle terms: What exactly is “header”?
We often hear the concept of “header” in the photography circle, so what is a header? The so-called header specifically refers to a fixed-focus lens with a focal length of 50mm. This is because the angle of view of the 50mm lens is very close to that of the human eye. Taking the angle of view of the human eye as the standard, the 50mm lens is the closest. The picture taken with a 50mm lens is very close to what the human eye sees, which is what you see is what you get.
There is another reason. In fact, the 50mm lens has a long history. For example, Canon released a Serenar 50mm f1.8 lens as early as 1951. After years of development, the structure of 50mm large-aperture fixed-focus lenses has been almost standardized, and the lens structures of major manufacturers are roughly the same, which is one reason why 50mm lenses are called headers.
Canon’s 50mm f1.8 STM is less than one thousand yuan and the price is cheap and sufficient
There are generally three types of 50mm fixed focus lenses on the market. One is that F1.8 aperture products are aimed at beginners in photography and have a very high price. Consumers can enjoy the charm of large aperture lenses for less than a thousand yuan. One is the F1.4 aperture product. Compared with the F1.8 aperture product, the 50mm F1.4 lens not only has a larger aperture, but also has better optical quality and softer out-of-focus blur. In addition, the workmanship is also More refined.
Canon EF 50mm F1.2L lens
The last thing I’m going to introduce is the 50mm F1.2 lens. Consumers of this type of lens are photography enthusiasts. , Not only the aperture is larger, but the image quality is higher, and the anti-glare, ghost, and purple fringing ability is stronger. It can be said that for ordinary consumers, the 50mm F1.2 lens is already the ultimate demand for “headers”.
Canon RF 50mm F1.2 lens
After entering the era of mirrorless cameras, as major manufacturers have introduced full-frame models, Related lens construction is also constantly improving. For example, the RF 50mm F1.2 we introduced to you today is a Canon EOS R full-frame micro-single dedicated large-aperture fixed-focus lens released by Canon in 2018.
Compared with the EF 50mm F1.2 lens on the SLR, the RF 50mm F1.2 lens is a completely new design. The appeal of this lens is to obtain the best picture quality performance when the aperture is fully opened. The lens design uses the large aperture of the RF mount and the short back focus distance, making the F1.2 large aperture and high image quality both. The lens uses a combination of 3 aspherical lenses and 1 UD lens, and uses a new glass lens.
aspheric lens that can suppress various aberrations, UD lens with low dispersion and chromatic aberration compensation
Large-diameter lens near the sensor
The RF mount of the EOS R series provides a 54mm large-diameter while greatly shortening the flange distance of the camera, making the lens back focus distance shorter. A large-diameter lens is placed close to the image sensor, so that the periphery of the screen also has high image quality, and at the same time, the lens optical design is miniaturized.
RF 50mm F1.2 lens and EF 50mm F1.2 lens
The appearance of the RF 50mm F1.2 lens adopts a very simplified design language, There are only AF/MF switch button and focus range selection button on the lens. A variety of functions can be customized at the front of the lens, such as sensitivity adjustment, wide angle change, and shutter adjustment.
RF 50mm F1.2 lens minimalist appearance design
For a 50mm F1.2 lens, the most common application environment is to shoot portraits , Let’s take a look at the real shot proofs of the portrait under the full aperture of F1.2.
Aperture F1.2, shutter 1/250 second, sensitivity ISO 100, exposure compensation 0EV
We can see from the above photo, in F1. 2 When the aperture is fully opened, the resolution of this lens is excellent, and the human eye can even see the pupil inside with 100% magnification. It is worth mentioning that EOS R supports eye detection autofocus function, which is very useful when taking portrait photos. The user only needs to pay attention to the composition and the state of the model. Focus and focus are completely left to EOS R.
aperture F1.2, shutter 1/400 second, sensitivity ISO 100, exposure compensation 0EV
the subject is prominent, the background blur is everyone’s choice for a large aperture The main reason for the focal lens, while the large aperture can also increase the amount of light, even in the dark indoors, you can also get clear and sharp portrait photos. In a library with a cluttered background, using F1.2 aperture can better separate the characters from the background.
aperture F1.2, shutter 1/4000 second, sensitivity ISO 100, exposure compensation -0.3EV
EOS R supports automatic eye detection Focusing, the RF 50mm F1.2L lens has a very high picture quality performance when the aperture is fully opened. The combination of the two provides a solid hardware foundation for the shooting of portrait photos, and the rest depends on the photographer’s own performance in composition and light consumption.
aperture F1.2, shutter 1/8000 second, sensitivity ISO100, exposure compensation 0EV
iris F16 , Shutter 1/250 second, sensitivity ISO100, exposure compensation 0EV
Backlight shooting generally brings ghosts and glare. I use F1.2 aperture and F16 aperture to shoot the looming sun among the trees. We can see that there is no ghosting or glare that affects the picture when shooting with the maximum aperture. After the aperture was reduced to F16, a starburst effect appeared to give the picture a dramatic effect.
Because the field of view is close to the human eye, the header is also very suitable for taking photos of humanities, street sweeping, etc. EOS R is equipped with a touch-sensitive flip screen, and the focus area selection is the same as manipulating the phone. The flipping of the screen makes it more convenient to view the view, especially at low angles.
Aperture F1.2, shutter 1/4000 second, sensitivity IS0 100, exposure compensation 0EV
Tell the truth, 50mm large aperture lens is good for shooting Active and alert cats are not a good choice. It’s too far to be photographed, you walk into the cat and scare away. And the depth of field of F1.2 is very shallow, and the focus is out of focus with a slight movement. However, under our combination, these are not matters. Thanks to the 30.3 million pixels of EOS R, although it is far away, the effect of a little cropping in the later stage is still very good. Set the screen to the touch shutter, when you click on the cat, focus and shutter release can be done in one go.
aperture F1.2, shutter 1/1600 second, sensitivity ISO100, exposure compensation 0EV
There are also some cats who are relatives, see The author squatted down and ran over. Because it is constantly moving, it is also a test for the camera’s focus. At this time, I flipped the camera’s screen to facilitate the viewfinder, and turned on the continuous shooting mode and tracking focus. This camera’s 8 frames per second continuous shooting can easily capture cats who are moving very fast. Of course, the USM ultrasonic motor of the lens also makes the focusing process quiet and fast, and will not disturb the cats with unusually sensitive hearing. The large aperture of F1.2 filters out the messy background and better highlights this pretty little raccoon.
flip the screen to make framing easier
aperture F1.2, shutter 1/3200 second, sensitivity ISO100 , Exposure compensation 0EV
aperture F1.2, shutter 1/4000 second, sensitivity ISO100, exposure compensation 0EV
color performance has always been Canon This is especially true for the full-frame mirrorless EOS R. JPEG format has good performance straight out. With the blur effect of the F1.2 large aperture, find the brightly colored foreground to blur, making the picture look more vivid and fuller and more layered.
aperture F1.8, shutter 1/2000 second, sensitivity ISO 100, exposure compensation 0EV
EOS R has a good tolerance performance, The weather was clear on the day of the shooting. I was standing under the corridor to shoot the details of the carved beams and paintings. The exposure of the corridor was accurate and bright, and the bright parts outside were not obviously overexposed. The light and dark connections naturally made the picture more harmonious.
aperture F1.2, shutter 1/2000 second, sensitivity ISO100, exposure compensation 0EV
Aperture F1 .8, shutter 1/1000 second, sensitivity ISO100, exposure compensation -0.3EV
aperture F1.2, shutter 1/2000 second, sensitivity ISO100, exposure compensation 0EV
aperture F1.2, shutter 1/1000 second, sensitivity ISO100, exposure compensation 0EV
Aperture F1.2, shutter 1/4000 second, sensitivity ISO100, exposure compensation -0.3EV
Portraits and still life pay attention to the subject to highlight the background blur, and when shooting architecture and landscape photos, Use a small aperture to achieve the effect of large depth of field, so that various elements in the picture are clearly presented.
aperture F8, shutter 1/2000 second, sensitivity ISO100, exposure compensation -0.3EV
iris F8 , Shutter 1/2000 second, sensitivity ISO100, exposure compensation -0.3EV
Of course, as a red circle L-level lens, the RF 50mm F1.2L USM lens has high reliability. The lens mount, switch, control ring, focus ring, etc. all adopt a waterproof and dustproof structure, making outdoor shooting more assured. The front and rear lenses are coated with anti-fouling fluorine coating, which is not easy to adhere to dust and stains and is easy to wipe.
water and dustproof treatment
The front and rear lenses have antifouling fluorine coating
The 50mm standard lens from the film era of the last century has evolved through several generations to the current full-frame micro-single 50mm F1.2 lens. The optical quality is more excellent and the image quality under full aperture is very amazing. If you want a high-quality large-aperture prime lens, then consider this RF 50mm F1.2L USM.
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