The Wonderful Digital Camera

A device that makes video recordings and takes photographs with the help of a light sensor is called a digital camera. There are certain cameras equipped to take only still photographs, can also record moving pictures as well as sound. The digital camera is steadily gaining popularity over the other cameras available.

The advantages of the digital camera are many. The images taken can be seen immediately after it is recorded. The memory storing capacity is also amazing. Even erasing or editing is simple task in these cameras. The multiple functions of this camera, is the reason for its wide ranging usage. It is used in cell phone s as well as in the astronomical instruments to obtain perfect pictures.

The original concept of the digital camera in its rudimentary form was conceived by Eugene Lany, a scientist working on jet propulsion projects. He had clearly elucidated he process by which still photos could be taken with the help of a light sensor. This was conceived much before the images were digitized on scanners. The main reason for making the devise was to keep the astronauts informed about their navigation during the trips to space. Various photographs of the planets and the other celestial bodies were sent by them.

Fuji DS1P was the first digital camera to be used in 1988, which had a memory of sixteen megabytes. In 1990, the first ever commercial digital camera was sold in the market. It could record and store videos and also could be linked to the computer for downloading purposes. It was named the Logitech fotoman.

The capacity of a digital camera depends on the sensor. There are various types of sensors like the CCD, CMOS which come in the shape of chips. The job of the sensor is to change light into indicators. The old use of the film in the cameras, have been displaced by the sensors. This vital part called the sensor has numerous buckets which keep a count over the photons touching the sensor. The image has a corresponding reading of its value. When the image is stronger, the greater is the reading of its value.

The capturing of the images in the digital is determined by the hardware build. There are three distinct ways of recording video. The single shot method refers to the system that captures images depending on how many times the sensor has been subjected to the light. Usually, in the first method, only a single CCD is used along with a filter called Bayer. Sometimes the sensors are used, three in number.

The next method also known as the multi shot method, is so named because of the sensor is subjected to light beams entering through more than one opening in the lens. There are again several ways of using this method. Scanning is the third method. It functions using only one track of sensors. At times the digital camera is also rotated to do the scanning. The method to be used is determined by the object.

There are different types of digital cameras today. With a whole lot of facilities they are being improved steadily to serve more purposes. The customer satisfaction comes from the wide ranging benefits reaped by using the digital camera. The blue tooth is a remarkable gadget that helps transfer of data, songs and images from the computer to the phone or the other way round.

This also helps one to transfer desired material from one camera to another phone too. Downloading songs and video images have now become pretty simple. The editing facility among others in the digital camera and its picture clarity makes it popular in the world today.

Digital Photo and Images in the Professional Practice

Image scaling is referred to as the process involved in altering the size of a digital photo or image. Altering the size can be done by down sizing or making the image smaller or enlarging it. Retaining the sharpness of a digital photo while being enlarged or downsized from its original size is the ultimate goal of every photo enthusiast. This is possible with the use of online or standard digital photo enlargement tools. Many interpolation algorithms available online or from downloadable software make it possible. But it should be always noted that the size and texture of the original photograph can affect the quality of the enlarged output image.

In digital photo enlargement, the size of a photo or image is increased and pixels normally become more visible in doing so. Most often, some of the details in the photo or the image are lost in the process, i.e. image or photo becomes blurred. However, there are many picture enlargers that can even out the appearance of the pixels from the original, thus retaining important details in the photo or image.

There are many methods of scaling like the nearest neighbor interpolation, bilinear interpolation and bicubic interpolation. The later is most preferred because it retains the sharpness and most of the details of the photo or image. Another good picture enlargement approach is found in some computer graphic software, called super sampling. This is also an advanced photo enlargement method that is best used when magnifying images or photos with low resolutions.

Why is it very important to pay attention to the details when enlarging or magnifying an image or photo? Photos and images taken from any digital camera have various purposes. Aside from personal purposes, digital photos especially are being used today by many professional practitioners. For instance, in the medical field, digital photos and images are used to present case studies and enhance reports. In dermatology for instance, digital shots of before and after acne photos may be used to explain a patients progress.

In aeronautics, there are already a number of attempts to discover life and other information in other planets, the moon and even the sun. Digital photos serve as evidence of these space expeditions. In forensics, though special UV or IR digital cameras are to be used, digital photos are also important not only to present evidence from the scene of the crime but also discover additional details of what transpired. These are some of the many professionals that benefit from digital photo enlargement.

Going back to the question earlier, why is it important to pay attention to details when enlarging or magnifying an image or photo? In relation to professional use, details are essential and very vital, especially in forensics as these may be used in litigation. Therefore, a major consideration when selecting a photography enlarger method or photographic enlarger service is that it should retain sharpness and valuable details while scaling the photograph. There are many software and even online providers that can do this service efficiently. Especially in large scale investigative projects, where sometimes the camera used is not set to its maximum or is not really a professional camera, it is very essential that digital photo enlargement capabilities of your software or the provider can handle photos with sub-quality.

Photography Is Ruining Travel

Travelling is all about gaining new experiences and seeking new environment’s to gain a wider knowledge of other regions on our planet. Every man and his dog has a camera these days presented in different formats from your standard digital camera to SLR cameras to camera phones and i-pads. In most cases these are the first thing we ensure we have packed before travelling abroad, and they are one of a few items that we take out with us on our day-to-day adventures. The problem with cameras is that they seem to get in the way of our day-to-day activities. Everybody seems to have the urge to take a picture of just about everything they see, rather than savour the moment with their own eyes.

It’s fair to say that some people spend their entire holiday looking through the viewfinder of a camera rather than with their own eyes. In many respects people are more interested about going home with a few good images representing their holiday rather than experiencing the holiday at the time for what it is. Not long ago I was on a boat trip in Namibia and we were being followed by a pod of dolphins riding the crest of waves behind our boat. I spent the whole time looking through the viewfinder of my camera trying to capture the perfect image of the dolphin’s instead of enjoying the experience for what it ultimately was, and that was the experience of a lifetime, I never did really get the perfect shot I so desperately wanted.

If we’re not careful we could all find ourselves in a situation where getting the perfect picture takes priority over the experience, where does it end? When you travel on safari these days all you see is hundreds of tourists all peering down their camera lenses at the animal in front of them rather than just sitting back and savouring the moment of being in the presence of such a wonderful creature. Although technology is positive in most ways, this certainly doesn’t seem to be a great indication of things to come. There seems to be so much pressure these days for people to get great pictures to impress their friends and families back home that half of the holiday is spent trying to get yourself into a scenario where creating this picture is possible.

There was once a time when taking a camera on holiday wasn’t important and it was all about the experience instead. These times seem to have come and gone and the future certainly doesn’t look promising judging by today’s standards and people actions whilst on holiday. With almost everyone having access to a camera these days competition between people to get the best picture is always going to be rife and until there is a fundamental change, photography over the experience of a holiday seems to be the way it’s heading.

Astro Photography

Shooting the stars at night can be a difficult but hugely fulfilling discipline in photography. We have all seen those utterly fantastic shots of stars streaking across the sky, or the milky way in all of its colourful glory, and marveled at this snapshot of the heavens. It can stir all sorts of imaginative thoughts, wondering who or what is out there, are we alone, and just how to these photographers take such fantastic shots! Well, there is good and bad news for those that wish to emulate them. The bad news is that you really do need to have access to a DSLR, a good tripod and lens. You will also need to develop an intuitive sense of how to use the camera settings and just where to point your camera in the night sky. The good news is, that there really is no magic going on with the camera. The controls are there to be manipulated and it is distinctly possible to learn how and when to use your camera to get these shots.

Ideally, you are going to want to get out of the city and into the country to avoid light pollution. The warm glow of the city lights tend to mask the true glory of the night sky, which I am sure that anyone who has spent time in rural areas will testify to. Coastal areas offer better visibility.

Aside from the post-processing, taking good shots of the Milky Way is also a matter of knowing just where in the heavens to point your camera. However, it is not needle in a haystack stuff, and you don’t have to be an expert astronomer, or understand which planet is which, or which star is part of which distant constellation, to be able to figure it out. Interpreting the celestial canvas is a matter of understanding the seasons, which dictates where the distant stars are in the night sky. If you really don’t care to learn this amazing science, and that is not big deal really, you can always download the a Stellarium, which will give you an idea of where to point your lens in the night sky. This will give you an idea of where to point the camera at a given time of year. For example, if you live in the northern hemisphere, you should point the camera up high into the night sky during winter and in the south during summer, where you will see Orion, etc and the wider Milky Way. In the Spring, the Milky Way is likely to be more on the western periphery of the night sky. During the autumn, you are most likely to see the Milky Way high above the western horizon

You will need a DSLR camera, as these tend to perform much more efficiently in low light conditions, picking up all sorts of data that we are barely able to see with the naked eye. The lens aperture is of fundamental importance. A wide open lens (say f/1.4 or f/2.8) will allow your camera to gather the most light, however, this will come at the cost of sharpness towards the edge of your images. An aperture of f/2.8 can produce acceptable results, but your really do need a lens of the highest quality to do so. Be careful not go stop too far back, to say f/11 or above. However, at f/4 there may be a possibility that the blurred effect can be more pleasing that the sharp effect of starts at that aperture size. Therefore, it can often be better to accept a little blurring as a more pleasing result. Prime lenses tend to offer the best quality; but that comes at a cost. They very often have a limited focal length which is not entirely suitable for the wide angle skyscapes you expect with astro-photography.

Focusing in the dark can be a troublesome business, but an important one. Achieving what is known as “hyperfocus” or “infinity focus” is the only way to ensure that as much of the scene is in focus as possible. However, this does not just mean just turning the focus ring to the widest setting – hyperfocal distance is actually just short of this. There is a way around this though; focusing on a torch or flash light placed around 50 ft away (or the distance to hyperfocus) can be just as effective as a more scientific method of determine the plum point on the focal ring. The second method would be to use live-view and zoom in (with digital zoom rather than optical zoom) and adjust the focal ring until the stars are sharp. In my experience, though, this is not always an accurate, or more to the point stress-free, way to focus on the stars.

When taking certain types of astro-photography, it is actually better not to capture any movement in the stars themselves. This means you are going to have to limit your exposure time. In my experience, limiting to 20 to 30 seconds will probably suffice. Of course, though, the close the stars are to the celestial pole, the shorter any movement will be, and vice versa. When looking straight to the north star, with a long focal length, you may even be able to extend the exposure to 90 seconds.

Manipulating ISO will also provide some control over both the number of stars in view and the quality of the image. These, unfortunately are conflicting goals. The more you crank up the ISO, the poorer the image quality will be. ISO’s of greater than 800 will show up noise, even when viewed at large scale. However, the benefits are that the camera is letting the light flood into the sensor, bringing out a number of distant stars that perhaps aren’t even visible to the naked eye.