Author: Geoffrey Lawrence
Source: articleage.com

With so many cameras to choose from where to start? Well, my way, rebel digital slr, to choose a new toy these days is to, rebel digital slr, start at the end. What are you doing? Err. . . images. Yes, but what kind of images and what will you do with them? The other burning question is how much you're willing to learn?, rebel digital slr, If you read this and actually made in the second part, I think we can assume that you are willing to learn at least a little '. So what to do? I want something that you can keep in your pocket at all times so the children can break? I want a camera that lets you take, rebel digital slr, pictures in all lighting conditions from a distance (with the right gadget screwed to the front of course)? This is a hobby or just a few quick shots? The CurveI learning have not seen any cameras in sales in recent years, not a fully automatic point and shoot "modes are, most will automatically flash for you, if necessary, you may ask why we should all other semi-automatic, rebel digital slr, modes and manual and assembly instructions to make your head spin. The, rebel digital slr, answer is that even if the camera is capable of producing good progress on most of the time, there are, rebel digital slr, moments when,, rebel digital slr, to get the results we want, we need a little 'know-how to apply and more that, rebel digital slr, the correct settings camera automatically selects choose.Before select a camera with lots of buttons and dials is, rebel digital slr, a good idea to consider if you will ever bother to learn what for '. I have cameras around, rebel digital slr, for many years, and I'm still learning what all the camera settings on my most recent is, rebel digital slr, doing. I never bothered to learn to do anything until I need them. So there are some obscure settings, rebel digital slr, I use to find one. Of course it would be nice if, rebel digital slr, only the buttons we need and have each, rebel digital slr, camera custom made for us, but in the real world all we can do is choose the level of control based on what we think who, rebel digital slr, wish to join a choice. Typically, digital SLRs have more buttons, dials and menus for a compact camera that gives you more control over your photos, but will be much steeper learning curve.SLR or compact? All cameras on the market can be divided in certain simple groups. The two main targets are set, rebel digital slr, and interchangeable lenses. fixed lens cameras tend, with few exceptions, are smaller, lighter and more deployable, so it is more likely to talk to you when you need it. Well that's the theory, but I think we can say that it is more likely to bother to, rebel digital slr, take it with you on that trip to the beach or zoo.However even with the current zoom lenses, which are quite wonderful, it is often too distant or too close the photos you want so you should be able to aim for a long telephoto or wide angle to change. Another big advantage of this single lens reflex (SLR) is that he is really looking through the lens, instead of a separate viewfinder so what you see is what you get, although this is less a problem, now that our photos can, rebel digital slr, be displayed on the screen of your digital camera. The, rebel digital slr,, rebel digital slr, downside of this is that in most SLR cameras soon end up with lots of gadgets rather heavy and are less likely, rebel digital slr, to get anywhere. For my desire for a compact camera to have on hand so that Ness would be frustrated by the failures was so for me the choice is up to each time.Digital or SLR film? We are still film cameras? Oh yes they, rebel digital slr, do and I would not mind betting that they continue to do so for many years and I would not mind betting that at, rebel digital slr, some point in the future there will be a game back and a large number of 'serious' photographers, will be returned to the darkroom. Some say that probably, rebel digital slr, have never used on any digital ever.You might think from the above remarks that I have die-hard fans of the film. Nothing could be further from the truth actually fully convertible digital and love it. I go to the pros and cons of making a separate thread that will soon, rebel digital slr, be posted, but for now, I just want to say that I am completely sold on digital and not feel that I lost something important by brand changing.Which? This is of course the big question you really want an answer and you know that no one will give you one. If you ask anyone with a camera will do most of the cameras they have, unless they have had problems with her, then people are very forgiving. I think the reason is that people think it is the wrong choice, because somehow managed, and have no plans to admit its failures. Back

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Author: Jason Busch
Source: articleage.com

This article is intended for the DSLR camera user, who has some notion of what DOF and apertures are related to the imager. Yet I am happy to read the following regardless of your level of photographic experience, because ultimately you want. Be sure to check my other items, I opened and terminology of depth for users of basic future.Aperture E DOFWhen I requested information on a blurry camera users' behavior, I immediately wonder what kind of camera that they – or a compact camera DSLR (DSLR-Type, Point & Shoot, etc.). Many DSLR camera owners who have difficulty understanding the depth of field (DOF) and is referred to as openings and imager. One reason for this experience and why so little with DOF, is because compact cameras are used for most of the life of a user of the camera, and are now discovering (albeit indirectly) the intervals, rebel digital slr, of the opening of a DSLR, have a variance much larger than their compact camera.When capture an image f/2.8-f/4.0 (which is, rebel digital slr, the general range of initiation of compact cameras), most images will be displayed automatically (for example,, rebel digital slr, there will be a great depth of field). The reason is that the size of the imager. Basically, rebel digital slr, put, the lower the imager than a 35mm camera, the bigger your DOF will be. Means imager in a compact camera offers about five times as much DOF as a 35mm camera. In other words, if you're used to shooting with a point and shoot camera, and shoot an aperture of f/2.8, it would be like shooting af/14 on a 35mm camera (5 * 2.8 = 14). If you have, rebel digital slr,, rebel digital slr, a Nikon, rebel digital slr, D70, Canon Rebel XT or 20D, the DOF problem is not so bad buy, but you are still experiencing the pain of getting used to a different depth of field and aperture settings, while using a compact camera most of your photographic life.So, let the first reason why the blurred images. Since the DOF was significantly higher if you have a compact camera, and since, rebel digital slr, your a DSLR now, this may cause. Make, rebel digital slr, sure the settings for opening at check DSLR and take mental notes of the holes while shooting. And probably the hardest thing to do is get used to the new DOF of your DSLR. I will not say the DOF of the compact camera that is used in the past to, rebel digital slr, be forgotten, because it might still be using the back-up, rebel digital slr,, rebel digital slr, camera. Yes, you have two different sets of rules to learn photography. It seems difficult, but it is not, once you get used to doing, rebel digital slr, . Practice, practice, focusing practice, rebel digital slr, .Check Of Your CameraUnfortunately, due to the exponential growth in the DSLR are made, there are, rebel digital slr, no cameras worse. The first step is to take the car and the goal of a point on an object, rebel digital slr, that is not multi-pattern. Then set the camera to its largest opening for the lens (the smaller the number is larger). Find something with a solid color, a reasonable amount of light (but not too much), and shoot with his back to the sun for the object., rebel digital slr, Disappear af/4.0. Then shoot the setting opening soon. If a, rebel digital slr, gap, so we highly recommend that you write some notes about your observations for each setting opening. Record hesitate when the camera, which opened what the ISO setting and shutter setting.Check that the concentration, rebel digital slr, of your LensAnd not known, because of the exponential, rebel digital slr, growth of the lenses are made, there are worse than ever, rebel digital slr, too slow . Now I do not have that many problems are slow you need to carry around a cross and garlic to protect themselves,, rebel digital slr, but for those few people who do not get a defective lens, one not burdened lot to say, "But hey, the My friend, slower is good!, rebel digital slr, "Initially, the lens, rebel digital slr, to check for any mechanical problems. Look through both sides of the, rebel digital slr, lens from a relatively bright light (bright light, the better) and see if you can locate a particle lens. Second, get the largest aperture the lens is possible, then shoot a light white material – would be a piece of white paper, white sheet, some ceiling. Please note that the white object you shoot is absolutely clean of any stains or anything. Why? Because this could mislead you into thinking you lens.The particles in the quality of your LensSuffice to say, is really what you pay. If you go out and bought a $ 100 lens when most other major manufacturers make a similar lens for 5 times as much … There is a reason. So, this one unfortunate problem of your photos are sharp as can contact the be.Electronic

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Ok Let’s continue

Crop Reduction

Some lenses are designed to reduce this crop factor. While they cannot eliminate it completely, they can adjust for it.

Essentially, the lens is designed so that the back (the part that attaches to the camera) is closer to the digital SLR sensor.

Since the back of the lens is closer to the sensor, it reduces the amount that the small-sized sensor crops out of the image.

There is one big drawback to this type of lens: it won’t work with a film SLR camera. If you’re never going back to film again, then lenses like these won’t limit you one bit.

Image Stabilization (also called vibration reduction).

The stabilization helps when you are holding the camera in your hands and taking photos at slow shutter speeds.

Typically, this would result in a blurry photo, but with an image stabilization lens you can get clear shots. The stabilization corrects for the fact that the lens is shaking around.

This is especially helpful on lenses with long focal lengths (100mm or greater) since camera shake is magnified at long focal lengths.

You are going to pay a huge premium for an image-stabilized lens, but if you take a lot of photos in low-light conditions and don’t want to attach the camera to a tripod all the time, this is the way to go.

Image-stabilized lenses are NOT necessary with digital SLR cameras that include built-in anti-shake.

Superior Optics

Some lenses are designed with special optics that adjust for distortion, reduce flare and stray light from entering the lens and are designed to produce images with maximum clarity.

These lenses all come with different names

For example, Nikon used the term “ED” while Canon’s pro optics are branded with an “L”

Any one of these lenses is going to cost significantly more than a lens without the superior optics.

Internal Zoom

This really is a specialty feature, but it can make a difference. If you have a zoom lens with an external zoom, the length of the lens changes as you zoom from wide angle to telephoto.

With an internal zoom, the length of the lens is always a constant.

This is helpful for 3 reasons:

1. an internal zoom does not affect the balance of the camera. If you have your digital SLR attached to a tripod and use an external zoom, the changing length of the zoom changes the center of gravity of the camera.

2. internal zooms tend to be smoother and faster than their external counterparts.

3. external zooms can “slide”. This means that if you are pointing the camera toward the ground, the lens will zoom in unless you are holding onto the zoom ring.

The World’s Most Expensive Digital SLR Lens

Each one of these features will add to the price of your lens:

• Internal zoom
• Wide maximum aperture
• Full-time manual focus
• Superior optics
• Silent autofocus
• Image stabilization
• Long focal length
• Crop reduction
• Non-rotating front element

Hope that guide can help you.

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Made to be the tool of choice for serious photographers and semi-professionals, the EOS 7D features an all-new 18.0 Megapixel APS-C size CMOS sensor and Dual DIGIC 4 Image Processors, capturing tremendous images at up to ISO 12800 and speeds of up to 8 fps. The EOS 7D has a new all cross-type 19-point AF system with improved AI Servo AF subject tra[Read More]

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Here’s the list of features that manufacturers pack into modern digital SLR lenses:

• Silent autofocus
• Full-time manual focus
• Non-rotating front element
• Crop reduction
• Superior optics
• Image stabilization
• Internal zoom

Silent Autofocus

If you enjoy taking discreet photos or don’t want your subjects to be aware that you’ve got a camera aimed at them, this type of focus will give you away every time.

Common names for this include Ultra-Sonic Motor (USM) and Hyper-Sonic Focus (HSF). All that these really means is the lens is dead quiet when it is focusing.

It’s is also an essential tool for wildlife photographers

Full-Time Manual Focus

On most lenses, if you want to switch from autofocus to manual focus you have to flick a switch on the lens.

Since autofocus systems don’t always get it right, having the ability to focus manually all the time is helpful.

Some special set of lenses that feature full-time manual focus. This means that even if the autofocus for the lens is engaged, you can still focus manually to make fine-tuned adjustments.

Non-Rotating Front Element

On some lenses, the front of the lens rotates when you focus.

If you put a piece of tape at the top of your lens and then focused on your subject, the tape would not longer be at the top.

So the front spins around. It is a problem if you are a landscape photographer trying to use a polarizing filter on your lens.

A polarizing filter changes the light entering the lens depending upon how it is oriented. Let’s say that you set your polarizing filter just how you want it.

Now you focus, and the polarizer spins around. It is no longer capturing the same image as before, so now you have to re-set it.You’ll have to re-set it every time you focus.If you know for sure that you’re going to take landscape photos with your digital SLR, you’re probably going to want to use a polarizing filter at some point.

Make sure that the lens you get has a non-rotating front element.

Continue  part 2…

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First and Third Party Defined

1. First party lenses are NOT interchangeable with cameras from different manufacturers: a Canon lens will not attach to a Pentax camera and vice versa.

2. The lenses are interchangeable with different camera models from the same manufacturer: a single Canon lens will work with every Canon digital SLR camera.

The third party lenses, there are really only three major players: Sigma, Tamron and Tokina.

The same third party lens can be attached to cameras from different manufacturers, so long as the lens mount is correct.example, the Tamron 28-70mm f/2.8 zoom comes with a Canon mount (to attach to all Canon digital SLRs)

Once you’ve bought a lens with a specific mount type it won’t attach to cameras that don’t share the same lens mounting system

First Party Advantages

1. Quality – the build quality of first party lenses (especially those made by Canon and Nikon) is part of the reason why many professional photographers don’t use anything else.

2. Compatibility – since all modern lenses are electronic, it makes sense that the camera manufacturers are the one who can make lenses that are most compatible with their cameras.

Third Party Advantages

1. More Options – camera manufacturers can’t make a lens to suit every need, which is why the third party companies are able to step in and fill the gaps.

2. Lower Prices – in order to be competitive with the big camera companies, many third party lenses don’t cost as much as the first party alternatives.
The quality of third party lenses has also improved, so many of them are now indistinguishable from a similar first party lens.

Third party lenses is that they favor the two leading manufacturers: Canon and Nikon. If your digital SLR is made by Pentax, Olympus or Sony, it will be much easier to find a first party lens.

Which One To Choose?

When you have a complete picture of the lens you would like to have, see what’s available.
If a third party lens is a closer match to your ideal lens than a first party, then I would recommend you buy the third party lens without hesitation.
if there is a first party lens that is also a strong contender, then compare the two side-by-side

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Optimized for Nikon digital SLR cameras but also compatible with film SLR cameras, the Sigma 105mm f/2.8 medium telephoto lens allows a greater working distance between the lens and the subject, helping it excel in all shooting ranges. The increased working distance of the lens is ideal when taking the picture of a flower among several branches, o[Read More]

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This Tamron AF 18-200 F/3.5-6.3 XR DI-II LD Aspherical (if) Macro is a great all around lens for all ocassions. With it's wide zoom capability from 18-200 the focal length will meet most needs. It also has a built in motor for fast accurate focusing. Designed exclusivly for the new APS sized sensors, you can be assured it will give you sharp res[Read More]

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Designed for Nikon digital SLR cameras, the Sigma 50mm f/1.4 prime lens is ideal for a wide range of applications, from landscape photography to portraiture. The lens offers an extra-large aperture that guarantees superior peripheral brightness, helping create sharp images with high contrast even at the edges. The molded glass aspherical lens, mea[Read More]

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85mm lens for Nikon SLR cameras

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