I adapt to what I have and if this is a prime lens then we’re essentially trying to make the best of the restrictions we have given ourselves.

Photography should be fun. Forget the numbers once you’re out there. Go enjoy it, and don’t come back without some great photos – whatever focal length it is you’re using. 😀

So whilst out with whatever lens you might have, you should be adapting your mind to suit what you see through the viewfinder, adapting your ideas, adapting your subjects, adapting your composition, and taking your photos accordingly.

Subjects appearing closer and fields of view becoming narrower are both rather obvious effects of different focal lengths.

The first picture, shot at 18mm, appears to show a greater distance between the objects while the one shot at 55mm is somewhat flatter, with the images appearing closer together.

For these three pictures, I had to stand further away from the lamppost to make it appear the same size in each picture as my focal length increased (as I zoomed in).

However, there are further, less conspicuous ways in which focal length changes how your images look. While they may not be quite so obvious to the beginner, they can be just as important depending on what you’re shooting.

I’ve already chosen my lens, which is always a fixed length, and am far more concerned with what I can capture with it, and how, than I am with why.

Anti-reflective coatings improve the clarity of your lenses and virtually eliminate reflections others see in your prescription glasses. By having a pair of anti glare glasses, you'll enjoy direct eye contact, unhindered by distracting reflections!

The first step to understanding this is to ask, what kind of camera do you have? And more importantly, what size sensor does it have?

So to repeat that earlier statement, on a full frame or FX camera, a 50mm lens will give you photos that look pretty much as the human eye sees the world.

Notice the distance from the lamppost to the tree, and the bin, and also how the blue cafe sign comes closer as the focal length increases.

When I’m out shooting on the street, I can adapt my images to suit the focal length. However, if you’re shooting something that needs a particular look, such as portraits choosing the right focal length is vital.

You might think the images in that post are rubbish, or you might think they aren’t bad. I would be surprised to hear you thought they’re rubbish because of the focal length though.

Put simply, focal length as denoted by the numbers on your lens (35mm, 50mm etc.) is the distance between your sensor or film and your camera lens when it’s focused to infinity.

In short, the 50mm lens you buy might not be giving you a 50mm focal length. The 35mm lens you buy might not be giving you a 35mm focal length either.

If a wider lens will make their features more prominent, longer lenses can, and often are, used to make them look more petite.

Focal length

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For example, a 35mm lens on a DX or APS-C sensor will give something close enough to 50mm when x1.5, and a 50mm lens will give something close to 85mm, which is handily a great length for portraits.

A lens which has been treated with an anti-glare coating transmits 99.9% of the light which can provide benefits such as:

And if you think others will get something from this focal length explanation too, help them find it by sharing or pinning.  😀

Personally, I take pictures to suit the focal length I have at my disposal, without even having the words ‘focal length’ enter my head.

When taking these pictures, the three objects did not move. I did have to move the camera further away from the pickle as I zoomed in to the higher focal lengths, to have the bottle the same size in each picture, but that was the only change I made.

The pictures taken at 33mm and 55mm were taken from this position only to show you the lessening distance between the lamppost and the tree.

For me, focal length is something you should probably know about as a photographer. And know about it well enough to explain it to someone else.

I’m happy to hear you’re taking a photography class. I took some a few years ago and they’re the best money I ever spent on photography. Far more so than any gear. I hope you get a lot out of your classes too. 🙂

howis a“wide anglefocallength” ora“telephotofocallength” determined?

This all means if you want to know you’re shooting the focal length as stated on your lens, you’re going to need a full frame or FX camera.

Understand a bit about focal length will help you choose the best lens for getting the best results you can. That’s important.

I’m taking a photography class at a local School of Photography and always refer to your articles to flesh out my understanding of what I’m learning. You have such a gift at simplifying what can be a confusing subject. I just wish I had a book to write in a tag! For a visual learner especially, I can see the illustrations in my mind’s eye and they stay with me! Consider a book! Thanks 🙂

False light in office surroundings can quickly cause eye fatigue and working on a computer can also put significant strain on the eye. Having an Anti-glare coating will protect your eyes whist working due to the decreased glare, and therefore result in less eye strain.

Shortfocal length

While that mini shoot was fun to do, we’ll always learn more from real world examples, such as these shots from the park.

Crop factor can be an annoyance when it negates truly wide angle lenses on non-full frame cameras, but it can usually be worked around for more common focal lengths.

Focal length camera

The main options for cameras with interchangeable lenses are FX and DX in DSLRs, APS-C in Sony (and other) mirrorless, and micro four thirds or m43 in Olympus (and other) mirrorless.

What is focal length oflens

As well as allowing for a shallower depth of field to blur the backgrounds, which is a whole other article, longer lenses can help make people look better.

Camera focal lengthchart

One reason the focal length doesn’t matter when shooting street is that nobody knows, or cares, how near or far things really are in your images, so long as they look good.

With the help of some Branston Pickle, Aesop’s Fables, and two men punching each other in the face, I’ll give you another visual.

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focallength中文

If you have a zoom lens, say an 18-55mm, you can use it any focal length between 18 and 55mm. Prime lenses are fixed at one value.

Standard lenses only transmit about 91% of light to the eye. The rest is lost to surface reflections. Anti glare glasses, or lenses treated with Anti glare coatings, also known as anti reflection, reflection free, AR or MAR coatings, were developed to reduce reflections for camera lenses and have now become available for prescription glasses lenses.See below two different images which show lenses with or without a coating and the difference it makes to your vision:A lens which has been treated with an anti-glare coating transmits 99.9% of the light which can provide benefits such as:Whilst Driving: An Anti-reflective coat can provide drivers with an increase in safety with faster recognition of potential hazards on the road, particularly at night-time. The reflection of a streetlamp or headlights on your lenses is practically eliminated.For Your Appearance: Anti-reflective coatings improve the clarity of your lenses and virtually eliminate reflections others see in your prescription glasses. By having a pair of anti glare glasses, you'll enjoy direct eye contact, unhindered by distracting reflections! Whilst Working: False light in office surroundings can quickly cause eye fatigue and working on a computer can also put significant strain on the eye. Having an Anti-glare coating will protect your eyes whist working due to the decreased glare, and therefore result in less eye strain.For Increased Durability: An anti-glare coating can further improve the quality and increase the lifetime of your lenses by offering greater scratch resistance, durability and a significant resistance to dirt and water.An Anti-reflective coating can increase the quality and the value of your prescription glasses. Anti-reflective coatings can also help to reduce disturbing or annoying reflections. It will also make your lenses appear much more attractive due to the lack of reflection. You will experience much clearer, sharper and more natural vision with a brilliance that is quite simply not possible with uncoated lenses.We supply free anti reflection coatings to all of our glasses which benefit you with:• Improved vision at night• Reduced glare from computers• Reduced strain on the eye• Your eyes are more visible• And fantastic looking glasses Anti reflection coatings are available for all lens options and designs, such as varifocal lenses, high-index lenses, polycarbonate lenses, photochromic lenses and polarised lenses.Please don't hesitate to contact us should you require any further information and one of our advisers will be happy to assist you in selecting the correct  options & lenses for your prescription, lifestyle and budget.Freephone:0800 690 6220sales@onlineopticiansuk.comFurther Information:https://www.allaboutvision.com/en-gb/eyeglasses/anti-reflective-coating/https://en.wikipedia.org/wiki/Anti-reflective_coatinghttps://science.howstuffworks.com/innovation/science-questions/question615.htmhttps://www.zeiss.co.uk/vision-care/better-vision/health-prevention/lens-coatings-anti-reflective-hard-layer-cleancoat-etc.htmlhttps://ecp.essilor.co.uk/lenses/coatingshttps://www.hoyavision.com/en-us/discover-products/for-spectacle-wearers/anti-reflective-coatings/superior-scratch-resistance/

The first, which is perhaps the single most noticeable, is how close to the camera your subjects appear. It’s the basic action of zooming in and out.

• Improved vision at night• Reduced glare from computers• Reduced strain on the eye• Your eyes are more visible• And fantastic looking glasses

As we saw above, shorter, wider angle lenses will add depth. Longer, narrower lenses will flatten the image. So what lens do we use for portraits?

If you have a DSLR and aren’t sure, it will probably be DX. These are the more common type, and if you never asked when you were buying it, you probably got a DX.

I said earlier that I don’t believe focal length is something to worry about once you’re out shooting, and this is where I can explain that further.

I’m not thinking about what I could be capturing with a different focal length. I’m concentrating on what I can shoot and not worrying about what I can’t.

Not when you can always find a different angle or composition or, if it’s really not working, to just forget it and find a different subject.

Had I been in the same park to take actual photos with a 55mm lens, and not just getting shots to demonstrate focal length, I wouldn’t have taken that third shot. I would have found other things to take pictures of. Things more suited to the focal length available to me.

Depending on what you shoot – landscape, portrait, street, travel, anything else – understanding the best focal length for the photographs you’re going to want to get is important.

Use it to pick the right lens for what you’re going to shoot, then concentrate fully on the creative side of things. Not the maths.

Please don't hesitate to contact us should you require any further information and one of our advisers will be happy to assist you in selecting the correct  options & lenses for your prescription, lifestyle and budget.

Even though everyone is different, we do have an idea of the boundaries of normality when it comes to the human form. And no model wants to have their nose or chin enlarged by the camera.

Because when you’re getting started in photography, all those numbers and terms can be pretty intimidating. They lead to a lot of questions for beginners around the subject of focal length.

If it looks bad, I highly doubt thinking about the focal length would have been the best way for the photographer to make it a better picture.

focallength是什么

Crop factor relates directly to the type of sensor you have in your camera, and will alter the effective focal length of the lens you’re shooting with.

An Anti-reflective coat can provide drivers with an increase in safety with faster recognition of potential hazards on the road, particularly at night-time. The reflection of a streetlamp or headlights on your lenses is practically eliminated.

And that leads us down the next rabbit hole. Because if you’re going to understand exactly how the focal length of your lenses will make your images look, you’re going to need to learn a bit about crop factor.

If you found this post on understanding focal length useful and want more practical photography guides, here are three more that can help you:

An anti-glare coating can further improve the quality and increase the lifetime of your lenses by offering greater scratch resistance, durability and a significant resistance to dirt and water.