why won t my back camera focus


why won t my back camera focus插图

Why is my camera not focusing properly?

DARKNESS Another situation where your camera won't focus properly is in dark situations. There simply isn't enough light for your lens to use. It's too dark. SOLUTION: There a few possibilities on how to remedy the situation when your camera won't focus because it's too dark.

Why can’t I focus on my photos?

Combining accessories can also cause back focus problems. Focal reducers also reduce back focus and, when used for prime-focus photography with an SLR, there may not be enough back focus left to accommodate the approximately 50mm needed for the camera body.

How to fix iPhone camera won’t focus?

In Camera app, there are many extraordinary features. One of them is Auto Focus and Auto Exposure lock (AE/AF Lock). This feature can help you when your iPhone camera won’t focus. Tap on the object you want to focus for a few seconds until you see the small yellow “AE/AF Lock” box.

Why is my autofocus not working on my DSLR?

Sometimes auto focus AF may not be possible if you have an Extender attached to your lens. Check your Extender’s instruction manual for lens compatibility. Any other lens add-on’s like magnification and closeup filters can also cause problems. What to do when your DSLR lens auto focus AF won’t work?

Did you get your lens to focus?

If none of these ideas solve the issue, check to see that the lens is working. You should be able to hear it working when you press the button.

What is the DOF of a 50mm lens?

Even at 30cm (about a foot) with a 50mm lens, f/2 (your lens can't focus any closer than that) the DOF is 24mm. So I'm not sure what kind of scenario you'd be shooting wide opened less than a foot from the subject.

What does it mean when a camera is closer than one foot?

That means it literally cannot focus on something that is closer to it than that distance. For most non-macro lenses, that is about one foot or so (check the specs on your lens if you aren’t sure). If you are closer than that, your camera and lens will “hunt” or attempt to focus by going back and forth with no luck.

Why won't my camera focus?

This is probably the most common reason that your camera won’t focus. The camera and lens both have metal contacts that must be in communication with each other in order for them both to function properly. If the lens isn’t attached properly the contacts may not be touching. So the camera can’t send the lens the message to focus when you press ...

Why can't my camera focus on my lens?

If the lens isn’t attached properly the contacts may not be touching. So the camera can’t send the lens the message to focus when you press the shutter button.

What does it mean when your camera is red?

You will see something like this in your viewfinder when you look in the eyepiece (you may see more squares or you may see just dots). These are the focus points and the one that is red or lit up is where your camera will attempt to focus.

How to focus a camera on a wall?

Point your camera at a plain wall with nothing on it and press the shutter button to focus. Notice what happens.

Why is my webcam blurry?

Smudge on the lens could be causing the blurriness you’re experiencing. Gently press the edges of the camera and make sure it’s properly connected to your computer. If the issue persists, disconnect the camera and restart your machine. Then plug your webcam back in and check if you notice any improvements.

How to update webcam driver?

Right-click on your webcam drivers, and select Update Driver.

How to improve bandwidth on a camera?

To improve your connection speed and bandwidth, use an Ethernet connection. If your current configuration doesn’t support a LAN connection, restart your router and disconnect all the other devices using the connection to free up more bandwidth for your camera.

How to adjust focus on webcam?

Keep in mind that some webcam models sport a physical ring or wheel that allows you to manually adjust the focus. Check if you can find such a ring or wheel, and then rotate the lens clockwise or anti-clockwise.

Why is my video blurry?

Video calls use large amounts of bandwidth. If the program that’s using your camera cannot access enough bandwidth, it will automatically reduce the video quality which could explain why the image is blurry and out of focus. To improve your connection speed and bandwidth, use an Ethernet connection.

What to do if hardware and device issues persist?

If the issue persists, run the Hardware and Devices troubleshooter. The tool is no longer available in the list of Additional troubleshooters, but you can use Command Prompt to launch it.

Does my webcam work on Windows 10?

Unfortunately, your webcam may not always work properly. Many Windows 10 users complained their webcams sometimes go out of focus making communication difficult during video calls. Without further ado, let’s explore how you can troubleshoot this webcam issue.

How to take a picture with autofocus on?

At this point you should have your camera dial set to P and your lens focus switch set on AF for autofocus. Aim your camera towards an object and press the shutter button half way down. When you see the middle focal point light up or blink, take the shot. You have now taken a photograph with auto focus turned on.

Why is it important to practice alternatives to auto focusing?

It’s important to practice alternatives to auto focusing, for times when your lens AF setting isn’t co-operating.

How to take a photo of a subject?

Try focusing on an object within the same distance as the subject you are photographing. Then switch the lens to manual focus MF, recompose and take the shot.

What happens if you have more than one focal point?

If more than one focal point lights up , or a different point other than the middle one, repeat this step.The image below is an example of a middle AF point selection, as seen through a Canon 400D. Depending on your camera brand and model, you may see more or less focal points. However many you see, make sure only the middle point is lighting up ...

Why is it so hard to focus on overlapping objects?

Focusing on overlapping objects can also confuse your lens. For example, if you are trying to focus on the horizon, or say an animal in a cage. Times like these can make it hard for your lens to clearly know what it is you are trying to focus on.

Can you use an extender to focus a lens?

Sometimes auto focus AF may not be possible if you have an Extender attached to your lens. Check your Extender’s instruction manual for lens compatibility. Any other lens add-on’s like magnification and closeup filters can also cause problems.

Can auto focus work in low light?

Auto focus may have trouble working properly in low light conditions. For example night shots.

How to erase all content and settings on iPhone?

To erase all content and settings, go to Settings > General > Reset > Erase all content and settings and then tap Erase iPhone. After this is completed, follow the on-screen steps and set up your iPhone as a new device. How to Fix iPhone Camera Won’t Focus – Method 8.

How to fix iPhone camera not working?

How to Fix iPhone Camera Won’t Focus Issue. 1. Tap the iPhone. Use a piece of napkin, or just your palm to tap the top of the iPhone – its rear camera lens end for several times . In most cases, this method works very well. 2.

How to restart iPhone when it says "Sleep/Wake"?

To restart your iPhone, press and hold the Sleep/Wake or Power button until the red slider shows up > Scroll and select the option to power off your iPhone > After a few seconds, press and hold the Sleep/Wake button again until the Apple logo appears. 7. Update to the Newest iOS Version.

What does AE/AF lock do on iPhone?

One of them is Auto Focus and Auto Exposure lock (AE/AF Lock). This feature can help you when your iPhone camera won’t focus. Tap on the object you want to focus for a few seconds until you see the small yellow “AE/AF Lock” box. This feature will keep the object to stay focus even though the iPhone is moving around.

Is the iPhone 6 Plus camera focusing?

iPhone 6 plus rear camera is not focusing, won’t remain stable and is blurry no matter how still I get whether video or picture. Automatic or manual focus not working either. Front facing camera works fine. Seems iOS isn’t doing anything but making it worse.

Why won't my refractors work straight through?

Many refractors won’t work straight-through with eyepieces or small cameras at infinity because the drawtube won’t extend that far. A solution that works is to use extension tubes, such as a star diagonal--it acts as a drawtube extension.

What is the back focus of a telescope?

Back focus is the distance from the end of your eyepiece drawtube to the focal plane of your telescope. It varies greatly depending on the type of telescope: Schmidt-Cassegrain telescopes (SCTs) typically have generous back focus distances of approximately 5 in.

Why won't 2 in diagonals achieve focus?

As one example, some 2 in diagonals won’t achieve focus when used with short-focal length 1.25 in eyepieces because the focal plane is buried too far down in the big diagonal, out of reach of the small eyepiece.

How far can a Newtonian reflector travel?

Newtonian reflectors have much smaller back focus distances, sometimes as little as 1-2 in. Refractors usually have large back focus distances; their long drawtubes can travel well inside focus, too. Back focus directly impacts your ability to use accessories with your telescope.

Can a M42 telescope work with a SCT?

The M42 Spacer Kit can adjust back-focus between your camera and telescope for the best astroimaging results. For refractors, a related issue is back travel. Many refractors won’t work straight-through with eyepieces or small cameras at infinity because the drawtube won’t extend that far. ...

Can a SCT have a back focus?

Combining accessories can also cause back focus problems. Focal reducers also reduce back focus and, when used for prime-focus photography with an SLR, there may not be enough back focus left to accommodate the approximately 50mm needed for the camera body. This is true even with an SCT's long back focus distance. The M42 Spacer Kit can adjust back-focus between your camera and telescope for the best astroimaging results.

Where Do I Measure Back Focus From?

Back focus is most commonly measured from the flat edge of the corrector/reducer facing the camera , not including the threads on the corrector/reducer. You can use a tape measurer (or more ideally, a pair of calipers) to measure back focus. See the diagram below:

How do filter wheels/drawers, off-axis guiders, and other accessory in the imaging train affect back focus?

Filter wheels, filter drawers, and off-axis guiders all have thicknesses that will add to the overall length of your imaging train, and these need to be factored in when calculating back focus. Each individual part has their own thickness, which you can usually find in the product manual online. Some manufacturers produce these components with thicknesses that match the spacers included with cooled astronomy cameras, so that you can easily swap out a spacer for an off-axis guider, for example. For that reason, we usually recommend sticking with one brand's product ecosystem as their components are sometimes interchangeable.

Is Back Focus Spacing Important for Planetary Imaging?

While it depends on the sensor size being used, back focus is not nearly as important to get correct for planetary imaging. The reason for this is because incorrect back focus spacing usually effects off-axis portions of the image like the corners. Since most planetary cameras use very small sensors unlike cooled astronomy cameras for deep sky, back focus is not nearly as critical and the effects of incorrect back focus spacing are usually unnoticeable.

What size threads do you need for a telescope?

This is most commonly M48 or M42 size threads, but thread size can depend on the corrector, reducer, or telescope. Make sure your t-ring and/or spacers you have can thread together between the telescope, camera, and any accessories in between. ZWO has a helpful back focus guide on how to thread their included adapters together to reach 55mm of back focus.

What is the best back focus length for a camera?

Usually not, but it depends. As mentioned above, 55mm is an industry standard for back focus length. You can reach that using a T-ring, which are used to attach cameras to telescopes and other optical accessories. No matter which camera brand you use, T-rings are designed specifically to provide 55mm of back focus spacing from the telescope end of the T-ring to the camera sensor. If your recommended back focus is 55mm , then you'll be ready to go with only a T-ring. However, if your recommended back focus length is longer than 55mm , then you will need to use spacers or a T-adapter to make it longer. If your recommended back focus length is shorter than 55mm, you will want to use a T-minus ring (also known as a short t-ring) if possible to get to the recommended back focus length.

Why is back focus spacing important?

Back focus spacing becomes even more critical to get right when you’re using a telescope/corrector with a fast focal ratio, or when you’re using a camera with a large camera sensor such as full frame or larger. The reasons for this are simple. The faster the focal ratio of a telescope (or corrector), the narrower the focal plane is ...

Why are my stars elongated?

If your stars appear to radiate away from the center, then your camera sensor is too close and you need to add more spacing. If your stars appear to be concentric around the center, then your camera sensor is too far and you need to remove spacing. Please note that sensor tilt and optical aberrations, such as coma and astigmatism, can also cause stars to appear elongated on their own and are unrelated to back focus.

How to close camera on iPhone?

To do that, follow these simple steps; Step 1: Tap on the home button twice to bring up a preview of the apps you've been using. Step 2: Swipe to the left to locate the camera app.

Why is my iPhone camera not focusing?

One of the most common iPhone camera problems is the iPhone camera not focusing. If you're trying to take photos and the iPhone camera won't focus , it is likely that the camera lens is damaged. But if the lens seems OK, it is possible that a software issue could be causing the problem.

What is the best feature on iPhone camera app?

It is a feature that is designed to help the iPhone camera focus. All you have to do to activate it is tap and hold on the object you want to focus on until the AE/AF box appears.

Why won't my iPhone focus on my photos?

If you're trying to take photos and the iPhone camera won't focus, it is likely that the camera lens is damaged. But if the lens seems OK, it is possible that a software issue could be causing the problem.

How to fix iPhone 6 camera?

Some iPhone cases can interfere with the normal function of the iPhone's camera. Therefore if your iPhone 6 camera is not focusing, the first thing you should do is remove the case. 2. Clean the Camera Lens. It is also likely that dust and dirt could have accumulated on the camera lens.

How to get the Apple logo on iPhone 13?

For iPhone 13/12/11/X/8: Press and hold the Side (power) button and either one of the volume buttons until the iPhone restarts and you see the Apple Logo on the screen.

What to do if software update doesn't work?

If a software update doesn't work or if it is not available, you can try resetting all settings on the device. This is the easiest way to delete and eliminate a setting that could be interfering with your iPhone's focus. Here's how to do it;