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Bayonet Lens
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As there is no one cameras that can fulfill all type of shooting situation, same goes to camera lenses. Each camera lens has its own characteristics and element with distinct advantage and disadvantage over others. By learning more about how camera lenses differentiate over each other, we get to know how to apply the right camera lens according the situation and demands.

It used to be that most 35mm SLR cameras (equivalent to the full frame format for Digital SLR) in the market come together with a 'standard lens'. Standard lens here refer to a lens with focal length of 50mm and this is the format that most people regards roughly as what we normally see with our own eye. As such, 50mm is still a very popular lens among all photographers. Normally 50mm camera lens has a maximum aperture of f1.8. There are also faster lens with maximum aperture of f1.4 and even f1.2. These fast lenses prove to bring better quality and much more useful though it all comes with much expensive price.

A thing that must take note of is that all SLR/DSLR cameras have interchangeable lenses. Changing of lenses can be done easily and is differentiated by the mount of the camera. The most popular mount for most cameras used today is the bayonet mount. In order to change lens in a bayonet mount, for taking out lens, press on a switch nearby to the mount then simply turn the lens 45 degree in a clockwise direction; for inserting another lens, simply align the lens accordingly to the marking on the camera body and camera lens and turn the lens in 45 degree anti clockwise.

The ability of changing lenses in SLR/DSLR is properly one of the biggest reasons behind the creativity and vast usability in photography compare to other cameras. Thus, a camera with a standard lens would not be able to allow you in using the camera to its fullest. Generally, most photographers will consider getting or must get another two lenses in the category of wide angle lens and telephoto lens.

What is wide angle lens? Wide angle lens usually cover in the focal range of 28mm to 35mm for full frame format. It will generally provide a wide angle view of what you see. As more area in front of the camera will be captured into the photo, it is widely use in landscape photography. Using wide angle lens, photographers generally has better control over the composition of the photo as the photographed subject can be really near to the photographer while at the same time the background can be kept in focus.

On the other hand, a medium telephoto lens usually covers the focal range of 85mm to 135mm. It generally gives photographer an advantage of capturing a subject that is far away. And more importantly, it is a superb portrait lens. Wide angle lens tends to makes the photo of a person's face appear bulbous due to the focal range; with telephoto lens, a portrait photo captured with the focal range of probably around 100m will result in the photos to appear more pleasing. As the photographer would have to be quite a distance away, the person being photographed tends to be more relaxed and the end result photos will appear much natural as well. Other than that, a telephoto lens tends to make the background in the photo to appear much out of focus. While it is used in portrait photography, this will brings out more of the photographed subject, his/her eye, face, etc which will greatly enhance the photo.

In between wide angle and telephoto lens, many photographers have their preference on zoom lens as it is very convenient. Zoom lens as what it has in its name provides photographers the luxury of adjusting the focal lengths easily without changing the lens between wide angle and telephoto. Of course, the disadvantage of zoom lens is it would not be able to provide the level of quality a prime lens would provide. Though with the technology for the camera lens nowadays, it will take a really detail eye to notice the difference.

Other than these, there are also few types of special lens for specific purpose. For example, fisheye lens and macro lens. The macro lens will allows the photographer to take photo of subject appearing in life size while fish eye lens will provide a visual of 360 degree surrounding, as mimic to how fish is looking to the world. Such special lens can produce really dramatic result though it is not really any everyday use equipment as compare to the typical wide angle and telephoto lenses.

Find out more things about camera lenses. Know more about camera lenses and how to use it to its full potential. Check out Basic Camera Photography for more information.

Sony Alpha Dslr-a300 Review

Complete with sensors in the CCD-sized 10.2MP APS-C, Super Steadyshot In-Body, Dust reduction system, Live view, tilting 2.7 "LCD, and all other accessories, make A300 as a dSLR camera for beginners who are very full in the features. Moreover, the prices is already bundled with the kit lens of Sony DT 18-70 F/3.5-5.6, I think this is the best buy for anyone who intends to try to dive into the world of dSLR.

The first time I get this camera, I feel this camera as a cool camera model, the form of this Sony dSLR A-300 slightly "rounded" in some part make it more compact (not the slim - but it seems very small), and more interesting for me - the design also different from the conventional dSLR. However, the design not cool as Panasonic L1, or unique like Olympus E-330, but I give credit for Sony for giving fresh accessories design.

The most part I like is the lens mount, made from metal materials, and get large diameter (even more than the mounting of the lens), plus there is the color orange, so that at the time of the lens attached, you can still see a thin orange line on with metal color which I very interesting to see.

The grip also comfortable in the hold, and also with the weight of the fitting, not too heavy not too light.

Materials used is quite visible plasticy, but it's reasonably well, with the price because I do not expect too much.

Apart from that, which also attract attention from me is low built-in flash (there are two sensors in the viewfinder for flash) and this make the built-in flash not as high in the body location (even lower than the A200), and have small view finder, which tend to be smaller than "the brother" A200, and of course also darker.

However, it can be compensated with the presence of the live view that shows 90% of the frame. One thing that is different is the form of the grip for A200 with the A300/350, I more like the grip form from A200, because it is more convenient and held steady for.

Skin tone reproduction in a natural feel, there is no deviation in color and certain color casting.

Noise at high ISO are very awake, and I feel it's better than the version of N, although not as good as C.

The Super Steadyshot really feel great, and it is very useful in many situations, I always turn it on and off only when using a tripod.

The dust cleaning sensor seem normally altough I still rate the dust reduction from Olympus as the most effective and best.

Details are also recorded good enough - although the lens also helps to determine it, but it is very good for 10MP camera.

There is also RAW + JPEG format, the RAW format to helps you to choosing the photos which you need to edit the photo intensively and which are already good in JPEG format.

Autofocus is also not too noisy, and compatible with a A-bayonet from Minolta and Sony. I do not know whether the old lens can work with the Super Steadyshot such as Pentax, but most likely can not, because I found no news about the used of old lens from other users of this camera.

Batteries also have infolithium that can provide accurate information per 1%, and the surprise is on the CIPA standard, the battery can be used to take 750 pictures, you can try to compare with others who can only take pictures averages 500-550.

Advantages

- 10.2 MP CCD is very good and can record the detail sharp enough.

- The super-steadyshot in body, so that any lens you put will already have the anti-shake, so you don't need to buy expensive lens if you not need it..

- The Live view is supported by 2 sensor, so you can do autofocus without delay and see the changes of focus on your display screen, and you are guaranteed not to lose the moment, not like others camera when using live view.

- The 2.7 inc screen display which can move up and down can give you space and creativity to take the picture

- Noise is controlled at high ISO levels.

- The price is very competitive compared with others camera in same level with the myriad of features.

- Availability of many accessories.

- The made is very good, although it's plastic look.

- AF is fast even in the area with low contrast and low light.

- AWB is very good, although can be better.

- AF point is enough, there are 9, you can set the composition more easily.

Disadvantages

- The noise can be better.

- No Top LCD.

- Different grip and body.

- Dust reduction not too good and noisy.

- Sony lens are expensive

- The standard setting are less then good, there must be a re-set for the color, specially for the vivid colors.

- Sony looks very commercial, and even the LCD protective cover, close hotshoe, must be purchased separately.

- The price for battery grip are expensive and over then others camera in the same levels

Overall, the Sony A300 is a very good choice for beginners. I would suggest A300 than A200, which does not have a live view, and also the price does not differ too much.

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What does a bayonet hood do?

Its a round plastic thing that attaches to a lens

It helps block stray light from entering your lens from obscure angles causing flares which lower the contrast of your pictures as well as cause the ugly halos in your photos. It also helps protect the front element of your lens from getting hit. Some high end canon lenses also have velvet lining the inside of the hood to attract dust so it wont stick to your lens's front element.

Reusable Facepiece Respirator is usable in extreme conditions..
Designed for comfort and durability, 3M(TM) Ultimate FX Full Facepiece Reusable Respirator FF-400 Series includes cradle that helps with donning respirator and to reduce pressure and hair pulling. Six-strap head harness configuration ensures secure fit and silicone nose cup design provides comfort. Unit also has wide peripheral view lens, which is coated with Scotchgard(TM) Protector to help ...

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