A few years ago, my wife and I went on a fall driving tour through part of Northern Ontario. After a great day of shooting we stopped at a beautiful lakeside restaurant, walked in, were seated by the waitress, and each handed a menu. After a cursory glance at the offerings I looked out the restaurant window and saw a photo opportunity that I just couldn't pass up. I put the menu down, told my wife to order something for me, and rushed out of the restaurant. (I'm certain that the waitress thought we'd had a fight.)

A telephoto lens is a great tool to help isolate your subject from distractions that might pull focus. As a photographer you have the power to control what your viewer sees, and more importantly, what your viewer doesn't see in the final image. A longer focal length can simplify your composition. Just remember to leave some breathing room around your subject. You still want to ensure that there is space for the eye to explore the surroundings and provide context for the main subject.

Usually between 70mm and 200mm, a telephoto lens is a popular choice for portraiture and weddings (especially an 85mm focal length) and at the longer end is great for wildlife where you can’t get too close to the subject. At the longer end, a telephoto lens gives you the freedom to shoot as an observer where the subject is unaware of the camera, and so is also great for fly-on-the-wall, reportage-style shooting. This is also the focal length range for many macro lenses.

On a trip through southern Alberta I came across a beautiful lake with a mirrored reflection and some nice evening light. I attempted to create a wide-angle landscape shot, but with a rather dull foreground, and lack of interest in the sky, the final image wasn't doing the scene justice. Instead I switched to a longer focal length and pulled in the far shore. When your foreground lacks interest, switching to a telephoto lens will help emphasize details in the distant surroundings that you may not be able to get to. I will regularly use this approach when the sky lacks interest as well.

Focal length inphotography

by G Rodríguez · 2016 · Cited by 10 — Fortunately, throughout history, the Foucault knife-edge test has shown the potential to measure transverse aberrations in the order of the wavelength, mainly ...

FOV tofocal length

But there’s more. Depth of field determines what part of the image is in focus going from front to back. Lenses with longer focal length tend to have a shallower depth of field, meaning you can focus on and separate (or isolate) a particular object far away, whereas shorter lenses have a deeper depth of field, which means you can get more objects in focus throughout the image.

Try: NIKKOR Z 20mm f/1.8 S, NIKKOR Z 14-30mm f/4 S, NIKKOR Z 17-28mm f/2.8, NIKKOR Z DX 12-28mm f/3.5-5.6 PZ VR, NIKKOR Z 24mm f/1.8 S

At 300mm and upwards, we have the super-telephoto range. This is most commonly used by sports and wildlife photographers, where it would be impossible to get close to the subject. At this range, and with such a narrow angle of view, it’s usually advisable to use a monopod or tripod to reduce camera movement (although Nikon’s in-camera vibration reduction (VR) and VR lenses can help with that), and also because lenses this size can be heavy to hold for long periods. Telephoto lenses can also be used with a teleconverter, which can double the focal length of the lens, giving you even more ‘reach’.

You should also bear in mind that focal length translates differently on a DX camera (such as the Nikon Z 30, Z 50 or Z fc) compared to an FX ‘full-frame’ camera because the sensor on a DX camera is 1.5 times smaller than the FX sensor. For example, if you put a 50mm lens on a DX camera, you will actually get the angle of view and magnification similar to an 75mm lens on an FX camera (because 50 x 1.5 =75).

The focal length of a lens also affects the perspective of an image. With a long lens, perspective tends to be compressed, with objects in the background appearing closer to the subject in the foreground, whereas with a wide-angle lens the relative distance between two appears greater.

Any lens with a focal length of between 8mm and 24mm is usually described as an ultra-wide. You’ll be taking in a huge angle of view of what’s in front of the camera. These are lenses for getting in really close with your subject to create drama and are also used extensively for astrophotography. However, at really low focal lengths there will be significant distortion at the sides of the image where straight lines start to look curved. Ultra-wides are one the hardest lenses to master but, with effort, they can deliver incredible results.

I liked the shot, so I packed the gear back into the car and headed into the restaurant where a wonderful pickerel dinner and a glass of wine was waiting for me.

Focal lengthformula

As angle of view goes down, magnification goes up. For example, a 24mm lens has a wide angle of view (around 84 degrees) and low magnification – perfect for sprawling landscapes. A 600mm lens has a very narrow angle of view and large magnification – great for taking close up shots of faraway wildlife (especially useful when you don’t want to get too close to a lion!).

Camera lenses are usually described by two main factors: one is the aperture or f-number (the maximum size of the hole where light gets through to the sensor, where the lower the number, the bigger the hole). The other is focal length, which is in millimetres. You will usually see lenses described by focal length first and then aperture, for example 85mm f/1.8.

From 24mm to 35mm, lenses are wide angle. These are beloved by landscape, interiors and architecture photographers, as well as being useful for street scenes and dramatic pictures of the night sky. Get close to your subject and you will accentuate the perspective in the scene. A wide angle is a great travel companion, allowing you to shoot landscapes, cityscapes, people and much more.

Olympus makes a variety of telephoto lenses. Many of them are great utility lenses that cover the entire gamut from wide angle to mid-range telephoto. My ‘workhorse’ lens is the 12-100mm F4.0 IS PRO. It has the perfect reach for many of the landscape shooting scenarios that I find myself in.

Principle of Anti Reflection Coating. Anti Reflection Coating is called as AR Coating. It is the coating to reduce the reflection upon surface of plastic and ...

The above story is absolutely true, but it leaves out one important detail. That photograph was not the first one I shot. This one was...

Angle of view is how much of the scene your lens will capture from side to side (holding the camera horizontally). A wide angle of view takes in a lot, a narrow angle of view less. Magnification is how ‘close’ you get to the subject of an image with the lens, like a telescope.

Focal lengthcamera

15x Magnification Mirror Experience precision and clarity with our 15x Magnification Mirror. This handheld folding mirror offers exceptional magnification ...

One of the best skills that any photographer can develop is the ability to mentally 'see' the final photograph before they even bring the camera up to their eye. Part of that pre-visualization is knowing how your camera gear 'sees'. Each lens you own will capture the scene in different ways, and although I mainly rely on my wide-angle lenses to capture landscape scenes there are several reasons why a telephoto lens may be the better choice for some situations.

Telephoto lenses have several characteristics that impact the final image. Of course, the important one is that they have greater reach and therefore pull your subject in closer and have it fill more of the frame. In the process they provide a smaller field of view and greater compression. The greater the focal length, the more pronounced these characteristics become.

by WT Welford · 1970 · Cited by 16 — The theory as usually presented leads to a logarithmic infinity at the rim of the pupil under test. A reformulation in which the knife-edge is replaced by a ...

If you had a simple lens made of a tube with one piece of optical glass at the front that focused the incoming light rays on a point at the back of the tube, the length of the tube would be the focal length of the lens. Modern lenses, however, use lots of different pieces of glass inside the casing to move light around before it hits the sensor and therefore focal length has nothing to do with the physical length of your lens. You can find two 85mm lenses that are completely different in size while, for example, the new NIKKOR Z 600mm f/6.3 VR S is less than 300mm in length.

LED lighting differs from traditional incandescent and fluorescent lighting in several ways, with the main difference being efficiency. LED lights use 25% to 80 ...

One scene almost demands the use of a longer lens - misty mornings. A low-lying mist can be difficult to capture with a wide angle lens, but zoom in and you see how the mist plays with the light. It also helps isolate your subject and simplify your composition. I rarely use a telephoto lens to photograph a sunrise, but when the sun is well defined through a thicker haze it seems a natural fit.

Dec 2, 2002 — What does this abbreviation stand for? Biszuweiter? What does it mean? Something like "from A to Z"? Please help. Proposed translations (English) ...

The most important thing about focal length, however, is not what it is, but what it does. Focal length defines two main things about any lens: its magnification and its angle of view.

focallength中文

Try: NIKKOR Z 180-600mm f/5.6-6.3 VR, NIKKOR Z 100-400mm f/4.5-5.6 VR S, NIKKOR Z 400mm f/4.5 VR S, NIKKOR Z 600mm f/6.3 VR S

One of the issues with photographing a landscape using a longer telephoto lens is that you may not be able to capture as much of the scene as you would like due to the narrower field of view. To compensate for this, try creating panoramas. When I shoot panos I photograph in vertical orientation, overlap each image in the sequence by 30-40%, and since I rarely use a tripod for my landscape images, I use the built-in level to try to ensure each image lines up well.

Telephoto lenses give the illusion that the space between objects has been compressed. This can create an interesting layered effect when photographing distant hills, or make a forest of trees appear denser, or exaggerate the curves in a winding stretch of highway. Part of the appeal of this type of shot is that our own eyes cannot see a scene in this way. Keep in mind that telephoto lenses provide less depth of field for subjects that are fairly close to the lens, but this is less likely to be an issue when pulling in more distant scenes.

Focal length

From 35mm and 70mm, we have the ‘standard’ focal length, which is pretty close to what the human eye sees. Photographers talk about the ‘nifty fifty’ – a large aperture 50mm prime lens such as the NIKKOR Z 50mm f/1.8 S – because a 50mm lens is an ideal day-long companion, suitable for so many different types of shooting, especially in low light situations or indoors. This type of lens also creates a shallow depth of field and great bokeh blur.

Focaldistance vsfocal length

Choose from our selection of optical tables, including inspection and measuring fixturing, grid fixture plates, and more. In stock and ready to ship.

Try: NIKKOR Z DX 24mm f/1.7, NIKKOR Z 26mm f/2.8, NIKKOR Z 28mm f/2.8, NIKKOR Z DX 16-50mm f/3.5-6.3 VR, NIKKOR Z 35mm f/1.8 S

Jun 15, 2018 — In order to operate the tutorial, use the Swap Objectives button to toggle between the 10x and 40x objective and simulate how these components ...

Camera lenses are usually described by two main factors: one is the aperture or f-number (the maximum size of the hole where light gets through to the sensor, where the lower the number, the bigger the hole). The other is focal length, which is in millimetres. You will usually see lenses described by focal length first and then aperture, for example 85mm f/1.8.

Try: NIKKOR Z 70-180mm f/2.8, NIKKOR Z 85mm f/1.8 S, NIKKOR Z 135mm f/1.8 S Plena, NIKKOR Z 70-200mm f/2.8 S, NIKKOR Z DX 50-250mm f/4.5-6.3 VR

As I looked at the image on the LCD, I wasn't at all impressed. The wide-angle lens, my primary landscape tool, just wasn't cutting it for this scene. There was way too much negative space and the crescent moon was just a speck. I realized that to capture the scene the way my mind’s eye was seeing it, I would have to switch to my telephoto lens.

Lens choice can often be difficult, especially with so many options in the Nikon Z mount range (and access to another 300 or so Nikon F mount lenses with the FTZ II converter). So, here’s a quick guide to the different focal lengths and what they often get used for to help you.

Check out these images of the same scene shot from the same position but with focal lengths from wide angle 24mm to telephoto 180mm and you can see how the angle of view gets narrower as the magnification gets larger.

focallength是什么

Mar 5, 2024 — These two images were captured from the same shooting position by zooming in from 35mm to 105mm. The magnification from the longer focal length ...

There are two types of lenses: primes, which have a fixed focal length, and zooms, where the focal length is variable. Zooms are super-handy as you often only have to carry one lens around that will be capable of shooting lots of different subjects, from landscapes to portraits, so it’s great for travel. Prime lenses, however, are usually lighter and are often available with larger apertures than zooms.

79 likes, 12 comments - lyngodley on July 6, 2024: "Start on a new immersive oil painting. 48x120. Part of the Waves + Particles Series ...

I grabbed by camera gear out of the car and quickly headed down to the shoreline. After a few setting changes, and some work with composition, I clicked the shutter release and got this shot...

Most of us are creatures of habit, and those habits can creep into our photography. It's easy to get stuck in a rut and use the same wide-angle lens, and the same compositional strategies when shooting landscapes. A telephoto lens can open up the possibilities and allow you to see the world in new and interesting ways.

My primary landscape lens is the M.Zuiko 7-14mm F2.8 PRO. It's fantastic for so many situations. But certainly not all. There are times when a telephoto lens is the better choice.

If you had a simple lens made of a tube with one piece of optical glass at the front that focused the incoming light rays on a point at the back of the tube, the length of the tube would be the focal length of the lens. Modern lenses, however, use lots of different pieces of glass inside the casing to move light around before it hits the sensor and therefore focal length has nothing to do with the physical length of your lens. You can find two 85mm lenses that are completely different in size while, for example, the new NIKKOR Z 600mm f/6.3 VR S is less than 300mm in length.

Photography is built on the elements of design - line, pattern, shape, etc. A good photographer tries to incorporate these into most of their images. Using a telephoto lens can isolate these elements from the 'big picture' and create an interesting natural abstract.

Peter has been a dedicated Olympus shooter for nearly 40 years, and has found a way to combine his passion for photography with his love of teaching to develop photography workshops with a focus on landscape, wildlife and astrophotography. Peter’s work has been published in a number of magazines including Canadian Geographic, Shutterbug and Outdoor Photographer. He maintains his own blog with an emphasis on tutorials that assist others in bringing their photography up to the next level.

For most photographers this may sound like a silly question, but it bares mentioning that, when it comes to focal length, anything beyond a 50mm equivalent is considered to be a telephoto lens. For those who shoot with a crop sensor that focal length will be smaller. For example, a micro 4/3s camera has a 2x crop factor making anything beyond 25mm fall within the telephoto range.