Sigma 100-300 mm

The Sigma 100-300 has been in the market for a long time, and they were updated in 2005. The lens comes with a constant f/4 aperture and it was designed to fit the full frame DSLR sensors. The lens comes in a variety of body mounts and has a lens hood and a tripod mount.
The lens also comes with a new multilayer coating that offers a great color performance and at the same time reduces ghosting or flare created by reflections. By design, the Sigma 100-300 will also maintain a minimal light fall-off and ensure that the peripheral brightness is of superior quality. You should expect high optical performance, which is displayed all through the zoon range.
With the Sigma 100-300, you will not worry about aberrations because the two SLD glass elements in the front and rear of the lens enable optical corrections to offer superior quality all through the zoom range. The lens is also available with an inner focusing system, which is responsible for eliminating the rotation of the front element of the lens.
Users of the Sigma 100-300 will benefit from the smooth movement of the zoom and focus rings because they come with the right resistance levels. The rings are made of rubber and this makes it better to handle and easy to turn. The focusing ring will end in soft stops on the different spectrum of focus. Sigma 100-300 also comes with 150 degrees of turning fidelity, making it easier for the users to focus the lens manually. The filters attached to it will not rotate as the lens focuses. 

Read More......

Sigma 70-200mm

The Sigma 70-200 is a popular choice for many serious photographers because of the various features it comes with.  It comes with a constant aperture that will make it easier for people to capture photos in different situations. It is also good for taking pictures in lower ISO. This will come handy for shooting in and low light situation. This lens is great for action photography as well.
When it comes to color and contrast, the Sigma 70-200 is excellent. The creamy background blur is facilitated by the presence of the 9-blade apertures. The chromatic aberration is well controlled, but the flare is not so, especially in higher focal ranges. At the 200mm mark, you need to have the sun and other sources of bright light far out of their pictures so that they do not end up with flare that robs the photo of its contrast.
You will not have to worry about distortion when using the Sigma 70-200. The lens shows a little barrel distortion on wide end and pincushion distortion at 100mm, which increases as it reaches the 200mm focal length. When it comes to vignetting, there will be little shading from 135mm to 200mm when the lens is at f/2.8. This phenomenon is especially visible if you use it with full frame cameras.
In order to avoid such problems, it is important that you stop the Sigma 70-200 lens down one or two stops from the maximum aperture. The users will also benefit from the fast and silent autofocus thanks to the Hyper Sonic Motor (HSM). The HSM is not only crucial for internal focusing but also helps in internal zooming. The front element of the lens will not rotate, making it possible to use it with the petal shaped hood.

Read More......

Sigma 50-150mm

The Sigma 50-150 combines the focal length range, size and weight as well as the wide aperture from the more professional telephoto lens. It comes with a flat plane of sharp focus but with a slight curve or distortion at the wide end. It comes with the latest optical technology and offers the users a good correction for ghosting, flare and aberration thus assuring them of high quality images all through the zoom range.
While the flare is well controlled at the 50mm mark, it is at its best at the 150mm. For the focal length, the transition is linear. Users will start noticing a mild barrel distortion in the center of the frame when the Sigma 50-150 lens is at 50mm and pincushion distortion at 80mm and 150mm. It can be quite strong on those two focal lengths.
When it comes to chromatic aberration, it is noticeable at 100mm at the corners, although it is not present at 50mm and 70mm. It becomes even stronger at the 150mm mark. With the Sigma 50-150, users will also experience vignetting at the corners at 150mm. Fortunately, they can clear up all the shaded region by f/4 and f/5.6 for corners that are evenly lit.
The Sigma 50-150 also comes with nice physical features. It has the HSM mechanism that is suitable for internal and rear focusing mechanism. The AF is not only moderately fast but also quiet. Manual focusing will produce some squeaking noise, but it is not loud or significant at all.

Read More......

Sigma 18-200mm OS

The Sigma 18-200 OS comes with a 11x zoom range and an image stabilization feature that makes it a versatile tool, especially for those who want a travel lens. With this product, the users will be able to capture different focal lengths ranging from telephoto to wide angle.
It comes with two SLD glass elements and two hybrid aspherical lenses that will correct the different types of aberrations. The housing of the Sigma 18-200 OS is not only compact but also light in weight. It weighs 14.3 ounces and measures 70mm in diameter and 78.1mm in length. It also comes with a new lens coating that will not only reduce both flare and ghosting but also b ring about an optimum balance in color.
What makes the Sigma 18-200 OS different from its predecessor is the Optical Stabilizer function - a unique technology from Sigma. This system applies tow sensors that will detect the vertical and horizontal movement of the camera so that it compensates the camera shake. This makes it a great choice for those people looking to take great handheld shots. The users will be able to capture photos in low light conditions without using a tripod.
The optical performance of the Sigma 18-200 OS is facilitated by a special low dispersion (SLD) lens and 3 aspherical glass elements. They will correct the aberrations and offer high quality images across the zoom range.

Read More......

Sigma 18-200mm

The Sigma 18-200 is a high zoom ratio lens that was designed for the APS-C digital SLR cameras. It is capable for covering different types of focal lengths. The lens comes with two SLD glass elements and two aspherical lenses that will offer corrections to a variety of aberrations. This also allows this lens to be housed in a compact and lightweight construction measuring only 70mm in diameter, 78.1mm in length and 405g in weight. 
Similar to other lenses from sigma, the Sigma 18-200 comes with the new lens coating that reduces ghosting and flare - one of the problems that are popular in digital cameras. The coating will also create the best color balance. The maximum magnification of the lens is 1:4:4 while the minimum focusing distance is 45cm at all focal lengths.
The Sigma 18-200 design also features an inner focusing system, which limits the rotation of the front lens. This makes the product the best when it comes to using the petal-shaped lens hoods and polarizing filters. The overall lens' length does not change when the users are focusing, making it convenient to handle and easy to use. The users will not have any problems with zoom creep when transporting or traveling thanks to the zoom lock switch.

Read More......

Sigma 18-125mm

Sigma 18-125 comes with the unique Optical Stabilizer function, which makes use of two sensors inside the lens. It will detect the horizontal and vertical movement from the camera, and then moves the optical image-stabilizing lens to compensate for the camera shake. With this system, the users will benefit from shutter speeds that are approximately 4 stops lower than usual. With the OS, it is possible for the users to capture subjects in motion.
The Sigma 18-125 lens has been designed to be used with APS-C digital SLR cameras. It comes with a light plastic construction that is similar to most kit lenses. The lens comes with a minimum focusing distance of 35 cm at all focal lengths and a magnification ratio of 1:3:8, making it a suitable choice for close up photography.
The SLD glass, the molded glass aspherical lens and two hybrid aspherical lenses will provide an excellent correction for different types of aberration. Just like the other types of lenses from Sigma, Sigma 18-125 comes with a super multi layer coating to prevent ghosts and flares so you will get high quality images on all ranges.
On the Sigma 18-125 lens, the telephoto part of the lens is tight and does not have any imprecision at all. It has a zoom lock, although it is not necessary since the lens does not creep in any way. The build of this lens is solid.

Read More......

Sigma 24-70 HSM

Designed for the full frame cameras, the Sigma 24-70 HSM is becoming popular among many users. It comes with a focal length of 24mm and it comes on a compact construction. This design comes with an overall length of 94.7 cm and it is ideal for a number of situations ranging from landscapes, snapshots and portraits.
Like other Sigma lenses, the Sigma 24-70 HSM comes with a super multi layer coating that eliminates ghosting and flare and at the same time to offer high quality image. It also comes with Extraordinary Low Dispersion (ELD) glass elements and two SLD (Special Low Dispersion) glass elements as well as three aspherical lenses to offer correction on all aberrations.
With the Sigma 24-70 HSM, the superior quality performance is ensured all through the zoom range. With it the users will benefit from the quiet and high-speed autofocus as well as a smooth manual focusing. The lens has a minimum focusing distance of 38 mm as well as a magnification ratio of 1:5:3. It also comes with a diaphragm with 9 blades to create an attractive out of focus blur.
The users will also benefit from the sharpness and accuracy of the Sigma 24-70 HSM lens. The sharpness will be seen in all apertures and focal lengths. However, it will drop sharply at 70mm when it is wide open. The users can avoid this by stopping down to at least f/4 so that they get the best images.

Read More......

Sigma 18-50

The Sigma 18-50 comes with a large aperture zoom and it is specifically designed for digital SLR cameras with at least 20 cm of focusing distance. This makes it a great choice for close up photography. This lens combines the hybrid aspherical lens technology with the glass mold one to offer high quality images, peripheral brightness and a compact structure.
In terms of sharpness, the Sigma 18-50 comes with a sharp image quality at different focal lengths. However, the sharpness will lower when you open up the lens to f/2.8, especially at the corners. For this reason, you should stop down to f/4 in order to bring the sharpness in focus. The sharpness gets better to about f/11, but after that it starts to decrease because of diffraction. At f/22, the images are not as sharp, and it is even worse as compared to when the Sigma 18-50 lens is put on wide open.
The focal length of the Sigma 18-50 will keep the image quality under strict control. The users will also benefit from the macro feature which allows the users to get very close to the subject. Some of other benefits they will enjoy include the lightweight and small size of the unit, which allows them carry it without any problem.
The users will also enjoy a correction of the color aberration, thanks to the presence of the SLD (Special Low Dispersion) and ELD (Extraordinary Low Dispersion) glass. It also comes with a multi layer coating that is characteristic of most Sigma lenses. The coating on the Sigma 18-50 will help in the reduction of flare and ghosting, making sure that the images are of high quality.  The two aspherical glass elements will also help in the correction of distortion, allowing users get the best photos.

Read More......

Sigma 17-70 OS

The Sigma 17-70 OS is a new version of the Sigma 17-70mm. It has been designed for different DSLR cameras and those photographers who are looking to enjoy the benefits of an extra zoom and extra apertures. This new version will provide the elements that were absent in the older version, including the OS and HSM motor.
The buyers will enjoy the F2.8 aperture of Sigma 17-70 OS because it can be used in different situations such as macro, portraits, general photography as well as sports. The aperture has also made it possible for the users to engage in hand held photography throughout the zoom range and at high auto focus speed. Those who love close up photography will also benefit from Sigma 17-70 OS because of the focusing distance that comes with a minimum of 22cm and a maximum magnification 1:2:7 ratios.
The Optical Stabilizer (OS) function provides users with shutter speeds that are almost 4 stops slower than would usually possible. The Sigma 17-70 OS also comes with three aspherical lenses and a single Extraordinary Low Dispersion (ELD) glass element that will provide corrections to different types of aberrations. This assures the users of high quality image all through the zoom range.
Just like other types of lenses from Sigma, Sigma 17-70 OS comes with a super multi layer coating that will decrease ghosting and flare, and at the same time offer images with high contrast. Apart from that, it comes with HSM, which will ensure a high speed and quiet Auto focus. The outstanding thing in this lens is the rounded 7 blade diaphragm, which causes an attractive blur to the image areas that are out of focus.
When it comes to vignetting, the buyers of the Sigma 17-70 OS will experience some of at the widest apertures. In order to avoid this, they need to get down one stop at the every focal length. Chromatic aberration is well controlled and the users can ignore the focal length and apertures.  Users will also enjoy a smooth operation when it comes to manual focusing. The focus ring will rotate during autofocus. The polarizing filter will not be a problem because the front lens will not rotate.
When it comes to the build, this lens is decent and better to handle.  It is good for different types of situations because of the fast and silent autofocus as well as the great OS performance of the Sigma 17-70 OS.

Read More......

Canon PowerShot SX130IS

With regards to selecting a digital camera you are going to find that many folks are looking for a very simple camera that is not very complicated. For some people the more functions and abilities a camera has the more challenging it is for them to learn how to use this properly. You may possibly be surprised to learn that there are in fact millions of people who want simplicity which is the reason why point and shoot digital cameras are becoming more popular. On this page we're going to be looking at one of these point and shoot cameras and it's the Canon PowerShot SX130IS 12.1 MP Digital Camera.
One of the primary things I would like to discuss concerning this camera would be that it is included with a 12 times zoom lens, which is impressive for a camera such as this. For folks who like to take closeups but are unable to get close to the subject you're going to find that the 12 times zoom lens is a thing that is very impressive. You need to also understand that the zoom function can be quite useful while you are trying to capture one thing but do not want to capture something else in the picture.

Read More......

Nikon Coolpix P510

The Nikon Coolpix P510 camera is a unique piece of equipment that is useful for many different types of users. Certain shock resistances make it an ideal budget DSLR camera that allows for fast, accurate, and high resolution captures without all the fragile equipment found on lesser devices made for city or town usage. Part and lens integrity is important for this demographic of users.
The device is equipped with a 24mm-1000mm lens and a 16.1-megapixel image sensor. Clearer, brighter, and highly focused images are the result of this union of features. 1080p images are capable of being captured even in darker or high sunlight situations, as well as movies and videos. Detail on even compromising images is of excellent clarity due to the image sensor.
Image stabilization features integrated in the Nikon P510 lets the user capture moving targets without heavy blur and unfocused parts of the image. Fast auto-focusing techniques allow for a quick, sudden capture without having to mess with the other settings of the camera. This allows for quick captures that do not have the time to be adjusted accordingly.
42x zoom capability lets users examine subjects from far off and still remain focused and detailed. This is a good feature for wildlife photographers who desire to capture a close image without disturbing the wildlife or its habitat. Distant zooming capabilities help in exposing minute details other devices may miss.
High resolution images and movies are both possible with the integrated features found in the Nikon P510. Its 16.1-megapixel image sensor lets captures include more clarity and detail than other devices. It is also capable of shooting up to five shots per second with a high speed shooting feature, for those needing to capture each frame on its own.

Read More......

Tricks and Tips to shoot Green Screen

You can add beauty and glamour to your photographs with chromakey green muslin backdrops.  Green screen backdrops are important photography equipments which can add to the collection of your photo studio. You can take amazing pictures with the use of these green screen muslin backdrops by following some simple tricks and tips...

Buy a high quality backdrop
    * Make sure that the chromakey green muslin backdrop used by you is made of high quality fabric. 
    * For good quality pictures, the backdrops must be made of durable muslin material and must be 100% cotton to absorb light.
    * The backdrops must be seamless and flawless to avoid any wrinkles in the photographs.
    * Buy a backdrop which is easy to fold and carry so that it can be used for on locations shoots as well.

Fix the backdrops properly
    * Make sure that the green screen backdrops are fixed properly to avoid any folds in the photographs.
    * The backdrop must be fixed at a place where lighting is proper. Lack of proper lighting can affect the quality of the images by leaving shadows in the images taken.

Use good quality software
    * Use good quality chromakey software to edit the photos taken against the green screen backdrop.
    * The software will help in eliminating the green screen properly from the photographs and you can add the images of your choice to make the pictures look beautiful.

Read More......

Light plays

Light plays a crucial role in the life and photography. Without it, the images are dark and lifeless. Therefore, it is a critical factor for obtaining excellent images. Some of you may not realize that the word is real photo from the Greek word which literally refers to the light absorbed in writing. With the light, each owner of a digital camera can different moods, create images. The photography is light-dependent. Since this aspect is used, can make or break a photo.
Although there is not really the standard method, how to use lighting when taking pictures, there are only the basics of what to do when taking pictures. For example, always avoid the subject of the image with the light behind them, or are listed as new lighting. This makes the subject is dark, except, of course, if you want a dramatic effect to your photos. The best thing to do, then take pictures with it, in front of a light source so that the picture that emerges is clear...
Another thing to avoid, images of metal or glass directly. This leads to a reflection of the so-called flash or diffused light. What do I do next in order is a clear picture of your digital camera into a 45 degree angle with the surface of the metal flashing on. However, understand that it is wrong if the photo shows a torch. It 's perfectly fine, especially if you have it, according to a particular effect on the images. To operate with respect to the type of light, because the softer light to create shadows hold. On the other hand, the direct light in different colors which are very ideal if you want to play, to create your pictures.

Read More......