Telescope lens 55-300 is not so clear after taking a picture?

Dear Masters,

please help me, i'm a bigginer and i love photography. I got a Nikon d3100 with 18-55 lens kit, it is awesome, but i was looking for zoom lens so i purchased AF-S NIKKOR 55-300mm lens kit. In 18-55 after talking the picture we can zoom up to see the small information of the pics, but in 55-300 it is not happening, if i zoo the picture after capturing it, will become bluer, i have tried it with trypad also, but no use. While using the zoom lens is there any setting has to be change in the camera? Will there any problem with the lens. So kindly help me on this

You wrote, "bluer," but did you mean "blurrier?"

If the images are blurrier, then eithe you or the lens is not focusing properly.

Try some shots using the manual focus mode. Take the time to focus as sharply as you can. Remember, when you use the Auto Focus feature, the device can only guess what details you want it to focus on. And if you also use the auto exposure features as well, sometimes the result is, at best, a compromise.

The longer the focal length, the more carefully YOU have to decide at what point you take control of your camera.

Blur is caused by two things.

Camera or subject movement during the exposure.

If your exposure is longer than 1/250th second, there's a high probability that the image will be blurred

You just have to hone your skills using the camera to prevent blurring.

Here is a shot that could have been blurred if I had not been using a shutter speed of 1/500th second

I think you mean burred, the longer the lens the more it magnifies the image, but the more it also magnifies movement, both subject movement and camera shake. You have to be practised to hand hold a 200mm lens.

Even on a tripod you must not touch the camera and you need a remote release or use the self timer to trip the shutter. Your camera has to be rock solid whilst the shutter is open.

First the question, is this a new lens or a second hand lens? If it is a new lens, take the lens and the camera to a Nikon outlet and ask the technicians to check that the lens is sitting properly- sometimes the mount is not properly adjusted and the distance to the sensor incorrect resulting in pictures that are not properly focussed. You may find that the heavier lens is applying pressure that the smaller lens does rsulting in the problem with the larger zoom and not the kit lens. If everything is still under warranty it is most likely an adjustment that will be done for free,

If it is a second hand lens you need to check that the lens itself is not damaged. Its focussing motor may not be working problem or their could be problems with the internal optics.

Try the lens on another camera if you know someone that has a Nikon, try ot on their camera- if it is exactly the same, chances are the issue is with the lens, if it works fine on their camera, get your camera checked as the problem is most likely there.

edit: something I thought about afterwards: what speed are you taking the pictures at? There's a general rule that when handholding a lens the speed of the shutter should not be lower than the reciprocal of the focal length. So at 55mm, it shoudl not be slower than 1/60th of a second (round up, better safe than sorry), and at 300mm it should not be slower than 1/300th of a second. If you do use slower speeds, you will most likely end up with "camera shake" which manifests as a blurring. It may not be that obvious on your camera viewscreen- but take that to 100% (zoom all the way in, then out three stops and that is your 100% zoom) and you will see it. If you are going to use slower speeds use a tripod, or if not possible a monopod or beanbag- And when using those, remember to turn off your VR or that can interfere with the focus

Use a faster shutter speed. When you're zoomed in that far, camera shake is a lot harder to manage. The slightest hand movement makes a big difference while using long focal lengths.

Mistake #1: You were looking for a zoom lens when you already have one. The 18-55mm kit lens is a zoom lens.

Mistake #2: Zooming in during preview will show details of the pictures, yes so if you see blur, that means you didn't take the picture properly. Try again with a bit higher ISO or more light.