What is the classification and function of SLR lenses?

SLR lens can be divided into zoom lens, fixed focus lens, macro lens, shift axis, soft focus and so on, while zoom lens can be divided into wide angle, standard zoom and telephoto zoom. Different kinds of SLR lenses have different uses. The following is the knowledge of SLR lens that I carefully recommend for everyone, hoping to help you.

Classification and uses Zoom lenses can be divided into wide-angle, standard and telephoto lenses.

Wide-angle zoom: When taking extremely wide photos, the first choice is a wide-angle zoom lens. Even a small change in focal length will bring extraordinary results.

Standard zoom: Common lenses can take ideal photos from wide-angle end to telephoto end. Suitable for beginners, both portrait and scenery can be taken into account.

Long-distance zoom: it can instantly enlarge the distant scenery and fully feel the unique bold framing and extreme background blur of the long-distance zoom lens.

Fixed focus lens can be divided into wide angle, standard, telephoto, telephoto and ultra telephoto.

Wide-angle fixed focus: it can shoot scenes beyond the normal viewing angle, and the fisheye lens can shoot a wider viewing angle of 180 degrees.

Standard fixed focus: The charm of standard fixed focus lens lies in its real and excellent imaging ability, which is suitable for shooting various scenes from portraits to landscapes.

Long-distance focusing: it can bring the subject closer, create excellent background blur effect, and even use faster shutter speed to solidify the action.

Telefocus: Not only can the distant subject be magnified at high magnification, but also the background can be greatly blurred, thus taking photos that highlight the subject.

Super telephoto fixed focus: Whether shooting wild animals and plants or sports scenes, the descriptive power full of telepresence is unmatched by other lenses.

Portrait: Suitable for fixed-focus camera shooting with 50mm (commonly known as Yuntai), 85mm and135 mm. ..

Scenery: Suitable for wide-angle fixed focus (such as 14mm, 20mm and 24mm) and wide-angle zoom (such as 15~85mm and 17~55mm).

Macro: Take Canon as an example, there are six models.

EF 50mm f/2.5 close-up shot with small macro and magnification of 0.5 times.

EF-S 60mmf/2.8 USM is a macro fixed-focus lens specially designed for EOS digital SLR camera, which adopts APS-C size sensor and can take macro photos with enlarged original size.

MP-E 65mm f/2.8 1-5X This is a macro lens, and it can get larger imaging than 1 times without any accessories. It is an ideal shooting tool for small objects.

When taking macro photography with the old Budweiser EF 100mm f/2.8 USM, the maximum magnification can reach 1: 1. At this time, the internal focusing system ensures the working distance of149 mm. ..

The new L-head EF 100mm f/2.8L IS USM is equipped with a telephoto macro lens and dual IS image stabilizers, which can play a good role in macro photography. Does it have a good reputation? EF 100mm f/2.8 USM macro? On this basis, its optical performance is further improved, and with the introduction of waterproof and dustproof structure, this lens finally becomes an L lens.

EF 180mm f/3.5L USM is a telephoto macro lens with magnification of 1 times. Suitable for long-distance full-size shooting, without disturbing the subject (such as insects, etc.). ). The internal floating focusing system reduces the dispersion fluctuation caused by focusing and keeps the image perfect and clear, Ming Rui.

Take Canon as an example. * * * There are four axis shifting lenses:

TS-E 17mm f/4L 17mm ultra-wide angle shift lens meets the shooting needs of architectural photographers. Can you do it? 6.5? Angle operation, adjust the depth of field; Can you do it? 12mm bias operation to control deformation; The tilt angle and offset direction can be adjusted by up to 90? Both tilt and offset can be rotated by shifting the axis; Can the rotation be adjusted to the maximum? 90? ; The large knob and handle make the operation more convenient.

TS-E 24mm f/3.5L II wide-angle shift lens meets the shooting needs of architectural and landscape photographers.

The focal length of TS-E 45mm f/2.8 45mm can take photos of natural scenery.

TS-E 90mm f/2.8 This lens is suitable for shooting product advertisements or portraits.

The difference between SLR cameras and digital cameras is 1, and the structure is different: SLR digital cameras are completely different from ordinary consumer digital cameras that we contact more. The difference here is mainly reflected in their internal structure, which is the same as that of traditional SLR cameras. Digital SLR cameras have basically solved the problem of aberration, that is, what we see from the inside of the viewfinder is the image to be exposed on the film. Because ordinary digital cameras use CCD photosensitive mode, what everyone sees on the LCD is the image that CCD feels, that is to say, what photographers see on the LCD is the image that everyone can shoot, and there is no aberration problem, so ordinary digital cameras can also shoot good macro, so from this point of view, SLR cameras are not dominant.

2. Shutter problem: Ordinary digital cameras are enough for ordinary users to take photos of this tour, but for photographers who have high requirements for adapting to harsh shooting environments, its shutter speed is extremely important. In ordinary digital cameras, it is extremely important to maintain the fastest shutter speed at around11000 seconds, while the fastest shutter speed of SLR digital cameras can easily reach 1/65438.

3. Different lenses: When it comes to SLR digital cameras, many people will relish that it has a variety of lenses that can be supported. Some people think that the biggest difference between SLR digital cameras and ordinary digital cameras is that one lens can be replaced and the other cannot. At first glance, it seems reasonable, but when you think about it, it's not. For example, Olympus E20P is a SLR digital camera, and the lenses are not interchangeable. Of course, most SLR digital cameras on the market are supported by supporting the lens group. In shooting activities, we can change different special effects lenses, and we can see different special effects through the viewfinder, and finally choose the appropriate lens Shoot.

Lens of SLR camera SLR digital camera not only supports many matching lenses, but more importantly, it also has a height that ordinary digital cameras can't reach. First of all, for example, the shooting effect of wide-angle end, most ordinary digital cameras insist on the position of 35mm~38mm, and a few high-end models support 28mm wide-angle lens. SLR digital cameras can usually take satisfactory wide-angle scenery photos with the original lens, and even can continue to expand the visual range with a special wide-angle lens. Secondly, digital cameras are very sensitive to jitter, and even a slight jitter will produce blurred photos during exposure. Ordinary digital cameras do not have the practical function of image stabilizer if they are not high-power zoom lens models, while SLR digital cameras can be equipped with extra lenses to prevent camera instability and jitter when shooting.