Zoom Camera Lens

Would someone please explain to me how the Zoom on a camera lens compares to the X power of a rifle scope?

For example I have 4X power rifle scope which means that what I'm looking at through the scope is magnified four times it's actual size.
How does this work with a zoom lens? Is a 200mm setting three times closer than a 50mm setting?
Is there a formula for figuring this out?

Zoom on a camera only describes the RANGE of focal lengths of the lens.
So a 4X zoom may be from 25-100mm focal length.
A 35mm film camera was the standard for comparing magnification for most photographers (and often it still is). A 50mm lens approximated the diagonal dimension of the film frame so a 50mm lens is refered to as a "normal" lens. It came the closest to what your eye saw at 1X magnification.
That means a 25-100mm zoom lens has a magnification of 1/2X at its widest setting to 2X at its highest magnification.

Power or "x" factor on a scope is MAGNIFICATION. A 4X scope sees and object as if it were 1/4 the true distance to you.

For your question, a 200mm setting is 4X more magnification than a 50mm setting.

When reading specs on a camera, you have to dig down to get the "35mm" equivalent of the particular camera focal length. An 7-28mm zoom may actually translate to 28-112mm in "35mm equivalent" because the CCD sensor on the camera may be only 12mm diagonal.

Here is your formula:

1. Make sure you find the "35mm equivalent" focal lengths of the lenses
2. Divide by 50mm to get your magnification range.
3. If the camera is 35mm film or is an expensive "full frame" sensor, simply divide by 50mm to get your magnification.

Many DSLR's tell you the "conversion factor" of lenses. Typical factors are 1.5, 1.7 and 2. That means when you stick a 100mm lens on a camera with a 1.7 conversion factor, the lens is equivalent to a 170mm lens on a 35mm camera and your magnification is 170mm/50mm = 3.4X

Here are some examples of 35mm equivalent focal lengths:
28mm = 0.56X good wide angle. You can capture nearly an entire bedroom view without "fish-eye" distortion
35mm = 0.7X mild wide angle. Easier to get group shots without backing up too much
50mm = 1X Pretty much what your eye sees in terms of magnification
85mm = 1.7X good portrait lens for face shots
200mm = 4X used to be the consumer limits for inexpensive telephoto shots
500mm = 10X used to be top of the line telephoto. These are the lenses used by those pro photographers that often get tackled on the sidelines of football games .

Hope that helps

Buying a digital Zoom Camera

I use the term Zoom Camera simply because this article is based on personal experience when buying a Canon SX110 IS, which is a compact digital camera with a 10x zoom lens. There are a number of compact digital zoom cameras with 10x up to 20x optical zoom lenses which fall into this category. However, I'm sure my experience can be applied accross the full range of digital cameras from the bottom end 'point and shoot' to the top end professional digital SLR's.

Having decided which camera I wanted, my next task was to obtain the best possible deal and thus the purpose of this article, because what looks like a good deal is often not the best deal.

The best place to start is online which shows up quite a wide range of prices. All the major high street retailers have a website and in most cases they offer a better deal if you buy online than you can get by visiting their shop. There are a number of price comparison sites which make this task a lot easier. However, you need to look beyond the price displayed or ticket price.

Quite often, as in my case, you are not just buying a camera. Look carefully at the 'what's in the box' information. For example, my camera came with only a 32MB SD memory card (only enough for around 6 images), a couple of alkaline batteries and no carrying case. So I decided that I needed a 4GB SD memory card, four rechargeable nickel cadmium batteries (two as spares), a battery recharger and a carrying case. Even if the box contains everything you need right now, it is a good idea to consider what you might need later because bought seperately, these items can add significantly to the overall cost. By bundling these items in with the camera at the time of purchase is the best way to get a good deal.

So don't just look at the ticket price of the camera. Decide what you need to go with it before you start comparing prices. Some online retailers offer huge savings on bundled items. In my case for example, the 'extras' I needed would have cost a total of £87.50 if purchased seperately, yet by bundling them in with the camera I was able to save £34. Even though the ticket price for my camera was higher with this online retailer compared with others their overall bundled price gave me the best deal.

About the Author

Richard Taylor is a keen digital photographer and having spent much time researching the best zoom camera for his own use, decided he would share that by creating a website featuring the top cameras in this category. Comparing prices, technical information, customer reviews and much more http://www.zoom-camera.co.uk

Zoom Camera Lens

Lens Digital Camera

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How do I clean the lens in my digital camera?

My digital camera has a spot that strikes more when i zoom in. I have the outside of the lens, but it is cleaned on the inside of the lens. I shook it and it seemed to move, but i cannot get rid of it. any advice? It is a Olympus FE-230

You do not mention the make or model of the camera, but if the dirt is inside the actual lens to any camera, I would not recommend a DIY solution for anyone who is not an experienced mechanic or camera rather shrude for dismantling and assembling something with many small and complex parts. This is a Task for a professional, I'm afraid. If the dirt or dust can be reached from an angle, it might perhaps be pushed away by compressed air in cans, but it seems a little far-fetched, if they are actually inside the lens.

A digital camera is a camera, the digital photos on a light-sensitive sensor increases. Many digital cameras can also record sound and video also still photos. These Cameras can store thousands of images on a small space. Users can also view the stored images. You can also delete the images stored . consider Erasure of the stored images are free memory of your device can then be used once more for the taking of photographs.
The digital cameras this day be included in devices such as mobile phones and personal digital assistants (PDAs) and vehicles. There are different types of digital cameras such as video cameras, line scan cameras, bridge cameras and live-preview cameras. The video cameras are classified as camcorders, professional video cameras and webcams. During a web-cam attached to your computer for video conference purposes is a camcorder is designed for use by amateur photographers.
A bridge camera often has a super-zoom camera lens, the zoom is a very wide area. These cameras are often equipped with digital SLR cameras, as their appearance is similar to each other confused. Many of the bridge cameras store pictures inloss-less RAW format. They are lighter in general, the DSLR cameras and to provide images of good quality. Most compact digital cameras store images in Tagged Image File Format (TIFF) and Joint Photography Experts Group (JPEG) file formats. Some cameras and formats, such as Design Rule for Camera Format (DCF), Digital Print Order Format (DPOF) and Exchangeable Image File Format (EXIF).
Zoom Lenses be as 3x, 4x means, 5x, etc. These terms refer to the ratio between the longest and shortest focal length. A larger zoom Name does not necessarily mean that the image can no longer be increased. A zoom lens is a photographer, with the focal length can vary the camera's built-in one area. The zoom lens allows users to reach to a variety of perspectives and compositions. These zoom lenses come in handy when the user the images for a dynamic Collection has the subject as an athletics meeting.

About the Author:

Jayson Pablo, an author who writes on different themes for Rupiz Compare and appeal to visit the site to get information about cunsumer electronics and Digital Camera.

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How to make a fisheye lens for a digital camera

Zoom Lens

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Where can I find a crank Zoom Camera Lens?

I know it is specific, but does anyone know a good video camera (microphone, or more than 15 x optical zoom) zoom with a crank? And this is not the kind of device that you find when you walk into Radio Shack no camera that takes pictures and videos, but as a smaller version of the film cameras with the crank, zoom? I do not have a photo alone, but I read that they had such things for the zoom.

Can you show us a picture? I do not remember seeing anything on a crank which camera ... there was a handle on some of the "original Zoomar" lenses used on TV cameras in the studio (who weighed more 1,000 pounds). These cranks were quickly dropped for the handles of the camera were the operator can control the zoom and has not had to use an assistant.

Aberration.

The inability of a lens to produce an accurate picture, particularly at the edge of a photography.
Usually, the more expensive the lens, the better its optical quality and less aberrations.

Angle

The area of a scene a lens can cover. The focal length of the target determines the angle of view. A wide-angle (short focal length) glass includes a scene more than a standard (normal-focal-) lens or telephoto (long-focal length) lens. Angle of view is fundamentally the angle at which light rays can pass through the prism to produce an image on film.

Aperture

The diaphragm is the opening formed by the blades of the iris diaphragm of the lens, through which passes the light to expose the film. Aperture Size is generally given f-number, the higher the number, more openness. Aperture Size set with a shutter speed determine the amount of light falling on film (exposure). The opening is sometimes called the "stop".

Aspherical lens

A lens with a curved, non-spherical surface. Used to reduce aberrations and to achieve a more compact lens size. With a spherical lens, rays from the periphery of the lens creating the image before the ideal focal point and gives a fuzzy center. With an aspheric lens, even rays from the periphery converge at the focal point lens ideal, producing a sharp image.

Chromatic aberration

The inability a lens to bring all wavelengths of light (especially red and blue) in the same business plan, causing a fuzzy set. Usually found regularly and openness telephoto and super telephoto lenses. Not improved by reducing the aperture size. Can be corrected with a low dispersion (ED, LD, SD) glass.

Color temperature

A way of expressing content and color quality of light, measured in Kelvin (K). "Daylight photographic" has a color temperature of about 5500K. Photography Tungsten lamps have color temperatures of 3200K to 3400k depending on their construction.

Depth of field

Distance between the nearest and farthest objects in a photograph that are considered acceptable edges. Depends on the opening, the focal length and focused distance. Opening the smaller, more objective and more focused distance, giving greater depth of field and vice versa.

Electronic flash

Designed to provide light where the lighting of the scene is insufficient. Electronic flash requires voltage, typically obtained with batteries and a voltage multiplier circuit which discharges a burst of intense short duration. Generally considered with the same photographic effect as daylight. Modern flash units have many features TTL exposure control and autofocus.

F-numbers or diaphragms

Numbers on the ring and opening the camera lens LCD (if any) which indicate the size of the lens opening. The higher the number is more openness. In sum, the scale, each number is multiplied by a factor of 1.4. Standard numbers are 1.0,1.4, 2, 2.8, 4, 5.6, 8, 11, 16, 22, 32, etc., each change resulting in a doubling or halving the amount light transmitted by the lens to the film.

Film Speed

ISO stands for International Standards Organization and figures such as ISO 100 or ISO 400 etc. give the film sensitivity to light. The higher the number, the more sensitive or faster the film. Basically, the slower film (ISO No bottom) clearer and clearer the picture. Grainy effect can be achieved with fast films (ISO no higher).

Flash sync speed

Exposure time with a focal plane shutter is measured from the moment the first curtain is released until the second curtain is released. The moment the first curtain closes, the electrical contacts for X sync close and fire the flash instantly.

Focal

The distance between the film optical center of the lens when the lens is focused at infinity. Focal length on most cameras Adjustable is marked in millimeters on the lens mount. The 35mm-format cameras, lenses with a focal length of 50mm are called normal or standard lenses. Lenses of 35 mm or less are called wide angle lenses and lenses of 85 mm or more are called telephoto lenses. Lenses which allow varying focal lengths without changing focus are called zoom lenses.

Lens

One or more pieces of optical glass or similar material designed to collect and transfer of light rays to form a sharp image on film, paper or projection screen. In practical photography, compound lenses made of a number of elements of different types of glass are used. This allows the manufacturer to correct most defects (aberrations) found in simple lenses and provide images that are accurate across the whole picture.

Lens Speed

Increased openness (smallest F-stop) at which a lens can be adjusted. Fast lenses transmit more light and have openings larger than slower lenses. Determined by the maximum aperture over the focal length. Lens speed is relative: a 400 mm lens with a maximum aperture of F/3.5 is considered extremely fast, while a 28mm F/3.5 lens is considered slow.

Perspective

Perspective is a two-dimensional representation of a scene in three dimensions. In photography this can be achieved by displaying 3D objects from an angle Rather than face. A photograph is also given if the prospect There are objects in the foreground, background and background, giving the whole scene "In depth".

Single-Lens-Reflex (SLR)

Light enters the camera through the lens is reflected a mirror behind the lens on a ground glass screen above. This screen is seen through the viewfinder and a glass pentaprism which turns the image the correct way up. Other camera functions such as light metering and flash control also operate through the lens of the camera.

Zoom Lens

A goal that can be adjusted to a wide range of focal lengths without a change of direction, an alternative for a number of individual targets of different focal lengths. One type of difficult goal to design and build, but very useful for the photographer who likes to travel light.

My name is Rene Waish, I am a hobbiest Photographer. I have intrest in photography snice my childhood. If you want to know more about me and photography please visit my blog at http://reenez.blogspot.com/

Nikkor 18-200mm VR zoom lens review

Angl Fisheye Lens

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You might be tempted to think that the camera lenses that you read about in this article are not really as necessary as all that. And you would reason. None of these accessories are necessary, but I must say however they do come in handy, and they will, given half a chance, be able to significantly improve your photographic efforts.

And that's where the camera lenses come in must-have category. Having different camera lenses on hand will give you more power and depth to your photos.
Having something like a wide angle lens or telephoto can help considerably.

Sure there are good chances that you might not have the good camera so you need a Lens, for example if all you have is a compact then the objectives of additional cameras should certainly not be on your list of things to buy. Personally I recommend you buy your SLR then go out and buy additional lenses for cameras. It's just a thought, however, nothing more.

Joking aside, the objectives of additional cameras give you the opportunity to take better pictures. You just need to know what camera lenses for you. If you go with the example of my fisheye lens, then you might be able to see what I mean.

However, Do not stop you from getting what you need. Here, however, I strongly suggest you learn about the options you because you have Many are available to you.

So what you want to buy wide angle or zoom camera lenses, depends entirely on your type camera, this type of photography interests you, and to a considerable extent, the depth of your pockets run.

About the Author:

Muna wa Wanjiru is a Web Administrator and has been Researching and Reporting on Digital Photography for years. For more information on Camera Lenses, visit his site at CAMERA LENSES

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Wide-Angle (Fisheye) Lens and Homemade Obstacle Testing