Posts Tagged ‘Lens Reflex’

Choosing A DSLR Camera – Some Considerations

October 1st, 2011 No comments

There are a wide range of options and features available for DSLR (digital single lens reflex) cameras and it can be confusing if you are buying this type of camera for the first time. This guide will help you decide which features are important to you and hopefully help you to choose your ideal DSLR camera.


A major factor in your decision is, of course, the price. DSLR cameras start at about $400 and can be as much as $8000 for a top of the range camera. A camera of between $400 to $1000 would probably be a good choose for a newcomer. Lenses tend to be expensive and can cost more than the camera body do make sure you take this into account when you make your budget.

Format Size

There are four format sizes at the moment for 35mm DSLR cameras.

Full Frame

This format, with a sensor size of sensor size is 36mm x 24mm, is found on most higher end cameras and is the same size as that used in 35mm film cameras.


On a Canon camera this format has a 15mm x 22.5mm sensor and on a Nikon 15.6mm x 23.7mm. This format is used by most DSLR cameras except some higher end cameras and Olympus makes. Nikon call it a DX format.


This format is only found in a few cameras such as the Canon EOS 1D MkIII and has a 18.7mm x 28.7mm sensor.

Four Thirds

This is a smaller format at 13.5mm x 18mm and is found on Olympus and Panasonic cameras. The aspect ratio is 3:4 unlike other cameras with an aspect ratio of 2:3.

All of the formats will give a good print out up to 11″ x 14″ which is the largest most amateur photographers will usually need. Most cameras below about $1000 dollars use the Four Thirds or APS-C format so the choice is usually dictated by the price rather than performance.

Image Stabilization Systems

Systems for image stabilisation vary between manufacturers. Some systems are mounted in the camera body others on the lens itself. Nikon and Canon use a lens based system and use gyros on the lens to sense movement and keep the optical groups stable. Gyros mounted on the camera body are used by Sony, Panasonic and Olympus in a stabilisation system called a sensor shift. The sensor shifts to compensate for any movement. Although both systems perform equally as well the lens mounted systems need to be included on every lens which adds to the cost. In addition not all lenses have the system included especially prime lenses under 200mm.

Size and Weight

Cheaper cameras tend to be smaller and lighter although, as no DSLR camera is going to fit into a pocket anyway, the size is not of primary important.

Pixel Count

DSLR camera start at about 6 mega pixels (MP) and can be as much as 22 MP for a high end camera. The pixel count will dictate the size that a print can be blown up to and you need to decide how large you would like your prints before you decide on which model to buy. 240 pixels per inch will give a very good quality print so a 6 MP camera will be adequate for a high quality 8″ x 10″ print.

If you need larger prints a 10 MP camera will be capable of producing a good print at a size of 11″ x 14″. A top of the range camera with a pixel count of 22 MP will give excellent 11″ x 14″ prints.

ISO Settings

ISO ranges between 100 and 1600 are found on most lower end cameras. Mid range cameras may have settings up to 6400 and a high end camera can reach as high as 25,500 and as low as 50. Most DSLR cameras will give pictures with low noise at ISO settings between 100 and 800 but the noise dramatically increases above this. The noise at the higher levels can vary considerably between models so, if possible, try to see images taken at higher setting with the cameras you are considering.


All digital images will have some noise which will be more noticeable at higher ISO settings. Noise comes from the electronics and sensor when the digital signal is produced from the analog signal. All DSLR cameras have noise filtering systems but this works less well above an ISO setting of about 800. Noise reduction softens the image so try to see images taken in low light if you will be using the higher range ISO settings.


Autofocus systems vary a great deal between manufacturers. All auto focus systems work well for static images but can vary a great deal for moving subjects, especially in low light. Check reviews of specific cameras for information on how well auto focus works for the model you are considering.

Janet Ashby

A Quick Checklist Before Buying a Digital Camera

September 21st, 2011 No comments

In a quandary as to what kind of digital camera to invest in? Should you buy the cheap one first or go straight for the Rolls Royce of digital cameras? Digital cameras can be extremely notorious for making you regret the “buy cheap first” decision. Getting an understanding of what digital cameras can and probably cannot do will go a long way in guiding you to buy that first one. Here are seven things to look out for:

  1. Categories of a camera
    • ultra compact–by far, the lowest of the low-end, no flash, no zoom, no nothing; just aim and shoot;
    • compact–for the hobbyist, basic features;
    • digital SLR cameras–single-lens reflex cameras, for the serious photographer.
  2. Mega pixels
    • 2 mega pixels–for basic snapshots; small prints are okay but pixelation occurs when the photos are enlarged;
    • between 3 and 5 mega pixels–you can count on good quality prints;
    • 5 mega pixels and above–aside from producing excellent quality large prints, you can easily do image manipulation.
  3. Zoom
    • optical zoom factor–by magnifying the light entering the main lens, distant objects appear close; this produces good quality photos;
    • digital zoom factor–magnifies the resulting image.
  4. Carrying case and tripod
  5. Most reasonably priced cameras will bundle these two items in the same package but very likely, the case will only be a pouch, which is just enough for the camera itself. If you have decided to “soup up” your digital camera, then you should also invest in a more spacious carrying case.

    The same can be said about the tripod, the bundled one will very likely be one of those 3-inch table top tripods which may also be wobbly. The tripod helps keep the shots stable and also to take advantage of the timer. The serious shutterbug will want to invest in a much taller and more stable tripod.

  6. Storage media
  7. Most digital cameras have some built in memory but do not count on this to store your photos because the memory size is very small. You will find that the built-in memory easily runs out when taking pictures of 5 mega pixels and above. Invest in a compact flash or secure digital flash card. 256 Kb will give you good enough storage when taking high mega pixel shots. But if you are an avid clicker, consider getting at least a 1 Gb card.

  8. Battery
  9. One of the most overlooked accessories is by far the battery. Most lower priced cameras will come bundled with a no-name battery which is almost tantamount to no reliability. People will tell you that these batteries should last at least a year but do not be surprised if these kinds of batteries breaks down in less than a year. The good news is that these batteries have model numbers and you can find a suitable replacement from a reputable manufacturer.

  10. Lenses and filters
  11. Just like traditional cameras, there are digital cameras that allow additional lenses to be attached or completely changeable. Three basic lens types are:

    • macro lens–allows you to take close-ups of objects like insects and flowers;
    • wide-angle lens–self-explanatory, used to capture large and wide sceneries;
    • telephoto lens–can you say paparazzi?

Filters can be used to soften or enhance images, which means adding more drama some shots.

It also helps to talk to your relatives or friends who have already owned a digital camera for some time. Their input plus the tips that you have just read will go a long way in helping you invest in a gadget that will give you hours of fun and capture moments that you will cherish.

Simon Wu

Information Regarding Best Digital Camera 2009

August 19th, 2011 No comments

Digital SLR comes from digital single lens reflex, which is named this way because of the mirror that sits behind the lens of the camera and sends the light to the viewfinder.

The digital SLR’s are designed in such a way that you can use a lot of different lenses, with different focal lengths. This versatility is the reason why digital SLR cameras are so popular among professionals. When you’re using a camera that is not a SLR, you need to match the angle of the viewing lens with the angle of view. If you’re doing short-range zoom or you have a fixed lens, then it’s OK, but at different focal lengths it can be much more difficult. The SLR is better because the viewing and taking lens are the same.

For more information on best digital camera 2009 click here

Best Digital Camera 2009

July 29th, 2011 No comments

Digital SLR comes from digital single lens reflex, which is named this way considering that of the mirror that sits behind the lens of the camera and sends the light to the viewfinder.

The digital SLRs are developed in such a way that you can use a lot of numerous lenses, with numerous focal lengths. This versatility is the reason why digital SLR cameras are so well known amongst specialists. When you are working with a camera that is not a SLR, you have to have to match the angle of the viewing lens with the angle of view. If you are performing brief-range zoom or you have a fixed lens, then it is OK, but at numerous focal lengths it can be a great deal a great deal more tricky. The SLR is superior considering that the viewing and taking lens are the similar.

When entry level digital SLR cameras do not at all times have Live View, advanced models frequently do, and they let you compose the pictures just like you do with a snapshot camera. The standard models will lock the mirror, and the prism will divert the image towards a sensor that is smaller. Then, rather of sending it to a capture sensor, it will be sent to the LCD screen, which can take down the performance a bit. If you are receiving an older model you could possibly have to have to focus on the image manually when you are in Live View, although contrast autofocus is on the market in newer digital cameras.

Digital SLR Camera Varieties

Digital SLR With Interchangeable-lens

These models are those regarded as as SLRs by most many people. Theyre also the ones that well be talking about in this post. Just like the name says, in these SLR cameras you can alter their lenses. This way you are able to switch from a supertelephoto lens to an ultra wide angle.

Examples: Fundamentally, most digital SLR cameras that are sold now belong to this sort.

Digital SLR With Fixed Lens

On these digital SLRs, the versatility is restricted by the truth that you cannot alter the default lens. The mirror that bounces the light towards the viewfinder is nonmoving and semi-transparent in most of these models.

1 example of a camera with fixed lens is the Olympus E-20N

Camera comparable to SLRs

Cameras that appear like digital SLR cameras are frequently digicams that have either an optical finder or a smaller LCD. You cannot think of them as digital SLR cameras due to the fact the mirror is missing, and the excellent of the pictures is not even close to what you can do with a accurate SLR. Frequently, this sort of camera has a exceptionally lengthy zoom, and one other name for them is magazooms or ZLRs.