That's because you have a different sensor size and it magnifies the scene. So you can take this exact same 85mm lens, but pop that on to a crop frame camera, then it's going to behave differently.

So I do want you to bear that in mind when people are talking about focal length of lenses. If you have a crop frame camera, remember to do that multiplication by 1.5 or 1.6, and that will show you how how that particular lens focal length is going to perform on your camera.

Click “Plugins” in the navigation menu on the left, then click “Open the plugin catalog”. You will see a list of recommended plugins for the DCS aircraft modules that DCS-BIOS has found on your hard drive:

If you want to get an idea of how different focal lengths perform, then be sure to download my FREE which lens kickstarter guide - it has examples of images taken at different focal lenghts, along with a guide about what you might want to use each one for.

The DCS-BIOS Hub only knows how to get the name of the currently active aircraft from DCS, which is not very useful. To teach it to interact with a specific aircraft in DCS, you need to install a module definition plugin.

Once a plugin has finished, its version will be shown. In the screenshot above, the “module-commondata” plugin has already finished installing, while the plugins for the A-10C and the Harrier are still being downloaded.

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What you need to do is take the focal length of the lens, and then multiply that by a number. That number is either going to be 1.6 if you use Canon or 1.5 if you use Nikon.

Now if I look again on my Zoom Lens (the image on the right) the 16 to 35mm, you can see it's got 1 and then it's got 2.8. So the maximum aperture of this lens is F2.8.

But if you are new to photography, the chances are you're NOT shooting with a full frame camera. You probably have a crop frame camera and that gives a world of difference on to how your lenses are actually going to perform!

So if you've been looking at lenses online, or maybe you already have your lens and you just don't understand what all these numbers actually mean, stick around. as by the end of this post, you'll know exactly what the numbers mean and you'll know how your lens is going to perform!

So for example, if you were using a 35mm lens on a crop frame camera, you're going to take 35 - that's the focal length of the lens - and then you're going to multiply that by 1.5 if you use Canon or 1.6 if you use Nikon.

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That’s it from me today, I hope that this answered your question about what all the numbers on a camera lens actually mean, and how you can use this information to see which lens is right for you!

So the photographer in the same position for both of these images. One was taken with a 35 and you can see, we can see more in the frame. For the one that was taken with the 85mm, you can see that everything seems more zoomed in, it's pulled closer to the frame.

Now here is an example of that for you. So here is an example of an image taken with a 35mm lens, and then one with an 85 mm lens on the same camera.

If I took a 35mm lens and popped that onto a crop fame camera, it's going to look more “zoomed in” than it would on a full frame camera.

After the installation is complete, start the DCS-BIOS Hub using the shortcut in your start menu. The DCS-BIOS Hub is a program that exchanges cockpit data and commands between DCS: World, custom-built panels, and third-party software.

Eagle Dynamics

You should now be looking at a web browser showing the DCS-BIOS Hub web interface. If that is not the case, verify that your firewall is not blocking the DCS-BIOS Hub from listening on TCP port 5010.

After clicking the start menu shortcut, you will find a new icon in your system tray. If you just installed DCS-BIOS, the icon will probably be hidden; you will have to click the arrow to show hidden icons. If you want Windows to always display the icon, you can drag it onto the taskbar.

So that was just with one focal length. But you may have a zoom Lens, in which case you're going to have two different numbers separated to by a dash.

So any LARGER larger than 50 mm, so for example, 85mm, 135mm, 200mm, they are going to give you a more zoomed in look. The larger the number, the more zoomed in it's going to appear.

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Now the aperture number is normally just written along the side or on the rim of your lens, and you'll see that it's got 1: 1.8 on lens below on the left, meaning that it has a maximum aperture of F1.8.

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So if you forget about having a lens there for a moment and you're just looking at a scene, roughly speaking, if you put a 50mm lens onto your full frame camera, it is going to give you roughly the same field of view.Now it's not exact, but it's kind of close enough.

Now I've actually got an extra little freebie for you that I think you'll love and will totally help to put all of this into perspective of how each lens will perform and what it can be used for. It’s my FREE Which Lens Kickstarter guide, and in that you'll get loads of image examples using different focal lengths so you can see what each one brings to the table. Plus you'll get some suggestions on which best lenses or focal lens you can use for different types of shots! Totally free and totally worth it. Go here to grab your copy!

So when you just have the one number, for example, an 85, it's got one fixed focal length. If you want to get closer or further back, you'd go and have to move your feet! It's fixed at that focal lens.

What that simply means is if you zoom in, you are going to get a different maximum aperture than if you zoomed all the way out.

Psssst! Don’t forget to grab your Which Lens Kickstarter guide underneath the video - it will take the video to a whole new level :-)

Now this number refers to the focal length, which is simply how much off the scene you are going to be able to see when you look through the viewfinder. A larger number will give you a telephoto view, which simply means that when you look through the view finder, everything will seem closer to you than it would the naked eye.

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So here's what I'd like you to do now. Go and grab your lens (or have a look at the one online if you haven't got one yet) and in the comments below, let me know what the focal length is.

On the other hand, if you have a number that is LESS than 50mm, so 35mm, 24mm or 16mm, then that is going to give you a view that is wider than the naked eye.

So that’s focal length explained - but how can we tell just by looking at the focal length number how that lens is going to perform on our camera?

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A smaller number will means you will have a wide angle lens, which means when you look through the view finder, everything will seem further away.

Now on some lenses you will actually see that you have two aperture numbers, and what that means is that you have a variable aperture lens. You'll normally find that on your zoom lenses.

If you’ve been asking yourself that question then you are in the perfect place, as today we’re going to be talking about what all the numbers on your camera lens means, and how you can use this information to decide which lens might be best for you.

And if you're using a crop frame camera, tell me what the equivalent focal length is and let me know what your maximum aperture is - It's a great little exercise just to make sure that you understand everything we’ve spoken about today!

If you want a bleeding edge version or are looking for a previous release, take a look at the complete list of releases instead.

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If the installation takes a while, you can just continue with the next step. The installation will continue in the background and you can monitor the progress by opening the “Plugins” page again at a later time.

However your Zoom Lens, because it has that two numbers, means you can move the zoom ring to zoom in and zoom out and you can go through that whole range of focal lengths.

So let's take that 85mm and we're going to multiply that by 1.6 (let's assume that we have a Canon!) and that's going to give us an equivalent focal length of 136.