Camera Parts

Thanks for visiting our site!
Lens Shutter
Checkout Ebay Auctions For The Cheapest Prices

Check out Amazon:

Here are some more information for Lens Shutter:

Sometimes we find simple images that help us understand new concepts. In our complex world full of complex devices, often it doesn't matter if we understand, for example, how a carburetor works but there are others where simple illustrations help quite a bit.

SLR cameras have been popular for quite some time. You may know that they predate digital photography which aspires to make experts of us all but some of the simple concepts will help you get even more out of your 'SLR', or yes, your 'DSLR' camera.

Let's see.

What does 'SLR' stand for anyway and what does it do? SLR stands for single lens reflex and this concept is what lets the viewer, the 'picture taker' see the same image that is being 'seen' by the lens and the recording sensor behind it.

In a 'point and shoot' camera there are two lenses: one for the viewfinder that you are looking through as you take the picture and the lens that projects the image to the recording sensor. These two lenses are typically an inch or so apart but they don't 'see' exactly the same thing. One of my favorite illustrations is the grade school exercise where you extend your arm in front of you holding your index finger extended and alternately close your right and left eye viewing your finger. It jumps back and forth!

This same perspective, 'parallax' shift is how different your image and that of the lens could be through a point and shoot camera.

In a single lens reflex, there is only one lens, thus the 'single lens' part of its name. The sensor and shutter are directly behind the lens but in front of the lens is a mirror placed at a 45 degree angle that essentially reflects the image up through a set of mirrors to the viewfinder. In this way you 'see' as closely as possible the same image as the lens does.

When you click the shutter button, this mirror is flipped up out of the lens path and the image passes through the lens to your sensor. For me, this is one of those concepts that is in one sense simple but in another creates a little awe as to who first had this dream.

There is a very interesting and surprising history of the single-lens-reflex technology which actually predates that of photography. Please check the link below.

SLR's are the camera of choice now for most professionals and this subtle obstacle was not only overcome with design, the advancement of digital technology has taken these cameras to impressive performance and impressive affordability for all of us.

http://en.wikipedia.org/wiki/History_of_the_single-lens_reflex_camera

Full Moons, Dogcreek, think globally, act locally.

Web Designer Tom Womack uses Adobe Creative Suite 5 and Cinema4D creating dynamic sites with rich media.

http://www.webforu2.com
http://webforu2.com/WebLog

Photography 101 - Basics About Aperture And Shutter Speed

Pre-set modes like "Sports" and "Night Portrait" make it easy for us to just point and shoot. If you're new to photography, two of the most important things to learn are aperture and shutter speed settings as these will give you a lot of creative control. If you're wondering which cameras have these settings, some digital compacts have them while most of the bridge (prosumer) cameras do and all SLRs have them.

At first it seems a little daunting to start using manual camera settings, but the vast improvement in your pictures will be worth the effort.

Photography 101 – Introducing Aperture

The aperture of a camera works a lot like how the iris of a person's eye works. Similar to your irises and how they widen or narrow to let in more or less light through the pupils, the camera's lens diaphragm narrows or widens to let in less or more light in through the lens. The aperture is the size of this opening.

Aperture lets the photographer (or the camera's exposure computer if it's set to automatic) increase or reduce the amount of light that gets through to the sensor, thus helping determine how bright or dark the picture will be.

The camera aperture also controls the image's depth of field.

To get a good idea of what this means, make a fist, holding it in front of your eye. Then slowly open your fist. See how everything is in focus when the opening in your hand is small? But when it's open wide the object closest to you is sharper than the background?

A small aperture is great for taking pictures like landscapes where you want everything in focus.

An Aperture Priority setting on your camera allows you to set the aperture within the camera's range of f-stop numbers (or called f-stop for short). These f stop numbers represent ratios meaning that the larger the f stop number, the narrower the aperture. So the larger the f-stop number on your camera, the larger the depth of field.

The reason the setting is called "priority" is that when you set the aperture, the camera adjusts the shutter speed so that the exposure is just right. In other words, in the wider scheme of exposure, the aperture setting will have priority, while shutter speed plays a supporting role.

Photography 101 - Learning About Shutter Speed

While the aperture controls how much light at one time falls on the image sensor, the shutter speed controls the length of time the camera allows in the light.

If you've ever seen really old pictures, you'll notice that they are rarely smiling. Shutter speeds were so slow back then that people had to hold perfectly still for several minutes – not to mention in all those stiff clothes they wore for picture day. No wonder they  looked so stern!

The shutter speeds most commonly used today are 1/500th of a second to 1/60th of a second. By using Shutter Priority, you can then choose the shutter speed (within your camera's range) for the exact effect you want.

For shutter speeds slower than 1/60 you will probably need a tripod or other camera support because when the shutter is open that long the camera records the tiniest jiggle, causing the photo to be out of focus or outright blurry.

If you want to freeze action (like what Sports mode does), set the camera's Shutter Priority to a fast speed. Only with this manual setting, you can be more selective. For example, a dog sitting quietly will require a shutter speed of around 1/125 in order to freeze the small twitch in the dog's tail. On the flip side, taking pictures at a soccer game may require up to 1/500 to freeze fast moving actions.

Using manual settings like Aperture Priority and Shutter Priority give you more creative control, which means better pictures that you can display on your wall.

About the Author

Autumn Lockwood is a writer for Your Picture Frames and loves taking pictures. Shop online and see our large selection of picture frames in a wide variety of colors, sizes and styles like our antique photo frames and ornate picture frames. Visit our website and see our vintage picture frame selection or call 1-800-780-0699.

How are the parts of a camera shutter supported and made to slide from the perimeter to the center?

A closed shutter looks like clam shells laid over each other to cover the entire circle of the lens opening in the camera.
How are the separate "clamshells" shaped? How many are used?
How are the clamshells supported on the perimeter of the lens opening, and how are they moved to the edge of the lens opening when the shutter button is clicked? Where do the clamshells go when the aperture is opened?
In sci-fi movies one sees doors that look like camera shutters. Where do the parts go when the door is opened?

I often wondered about that too!

I just did a search for "leaf shutters" and this is useful as a start http://pheugo.com/cameras/diaphragm/diaphragm.html

Reportlinker Adds Global and China Flat-Panel TV IC Industry Report, 2009-2010
Reportlinker.com announces that a new market research report is available in its catalogue:

Thanks for visiting!