The Marine Digital Camera Is For Professionals
Posted on November 27, 2008
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The people that use genuine marine digital cameras are those where it is usually used in the course of their work as these cameras are very expensive Studying the life below the surface, a marine camera is only normally within the realm of marine biologists and other nautical scientists Waterproofing a camera is not an easy thing to do so many, so called, marine cameras aren’t really designed for that type of work
Now if you’re really serious about using an marine digital camera to capture those wacky and funny moments underwater, I suggest that you buy a specialty camera.
There aren’t that many manufacturers of these specialist cameras owing to the problem of water ingress into the cameras case and the pressure they have to work under. Some of you may have seen or tried the cheap solution to this problem that comes in the form of a plastic casing. This type of casing will turn your conventional digital camera into an marine digital camera.
If you are shooting with your marine digital camera, you need to take note of a few things to help you come up with the best underwater images.
The water has a strange effect on light as I am sure you have experienced from time to time; it is called diffusion and the deeper you dive the more this distortion takes place. direct result of diffusion; a problem that can be overcome by changing the white balance settings. This diffusion effect also magnifies the image to give the impression the zoom function was used. To ensure the correct image will be taken you will have to pay a little more attention to the shot you are taking.
It is not uncommon for waterproof case to spring a leak so before you go on your dive, check that the camera I still watertight by submerging it for a couple of seconds. It is quite easy for something as tiny as a human hair to break the camera case seal and this will lead to a leak. Small silica gel packs can be useful if they can fit in the case without causing an obstruction.
Optional lenses are often available so if you can add these to your marine digital camera then do so. Lenses that allow you to get really close to the subject can also normally be fitted jus ask if the camera has a macro facility.
The seals on the marine digital camera need to be kept clean and free fro contaminants so ensure the camera is thoroughly rinsed of when you return to the surface. In particular where sand is present then a stream of water to rinse it off is best.
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Photography For Freelance Writers
Posted on October 22, 2008
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Thinking of becoming a freelance writer? Then you should also think about photography. Your articles will be much more valuable if you can include some good, original and pertinent photographs in your articles.
As a freelance writer you will get paid a lot more if you include original photographs from your travel assignment. Be sure that your client is willing to pay extra for any photographs attached to your assignment, you don’t want to go to the added expense and risk of carrying an expensive and heavy camera with you if you aren’t going to be paid for the photos.
With a digital camera and a quality memory stick, anyone can take a reasonable photo. Why not add photography to your repertoire, you will be adding to your value to you client.
A handshake deal will always cause you problems, either you or your client will remember something differently. Trust is a good thing, so trust in your contract or written agreement, not in yours or your clients memory or honesty.
If you have agreed to be reimbursed for your travel expenses you must be absolutely sure that you are giving your client what he wants. It is no good going to Spain and writing and taking photographs of the most wonderful things that Spain has to offer if your client wants an article on Portugal.
You will need to know how many photos he is willing to pay for. What photos he wants, and what the subjects are to be. How much per photo are you going to get paid, and who holds the copyright.
You may be lucky enough to get a pic of something that may have historical significance. If you give away the copyright, you give away any potential future income from that photograph. So my advice is never give or sell the copyright of any photo you take.
To the uninitiated it may seem a waste of time and effort to take so many pics of the same subject. But it is better to have too many photos than to have the few that you take turn out to be useless and amateurish. Take lots of photos then you won’t have to go back to your location to re-shoot if something goes astray.
This is why digital photographs have become much more popular. Taking hundreds of photos on film was a very expensive exercise. With a digital camera you can take thousands of photos, download them onto your computer, chose the ones that you want to keep and discard the rest and it wont cost you a cent.
Full Frame vs. Crop Digital SLRs: How to Choose
Posted on October 10, 2008
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If you're looking at getting a new digital SLR, you've probably come across the issue of sensor size. As you probably know, the sensor in a digital camera is responsible for capturing the image. Since DSLRs have much higher quality sensors than digital point and shoots, SLRs are able to achieve much better image quality. In general, the bigger the sensor, the better the image quality.
Because a larger sensor also means a greater cost, SLR manufacturers have to compromise. Ideally, a digital SLR sensor would be exactly the same size as a frame of 35mm film. However, the cost of producing a sensor like this is so high that most manufacturers decided to create a smaller sized sensor, one that is a fair amount smaller than a full sized sensor. This creates the so called “crop factor”
This crop factor is usually a number around 1.5. Basically, this means that if you were to look at a full 35mm frame, the crop sensor would only capture a 1.5x crop of the frame. For the same focal length, you are, in effect, getting a more "zoomed in" view. This means that your wide angle lenses will be less wide, and that your telephoto lenses will have more reach. For every given focal length, be sure to note that the depth of field will remain the same.
For many photographers, these crop sensors work great. If you’re into sports, wildlife, or any telephoto heavy photography discipline, the extra “reach” you get from the crop sensor really comes in handy at times. You can also get extremely affordable crop frame bodies, such as Nikon’s D40. These cameras are a real boon to amateur photographers.
However, full frame sensors still hold a serious advantage in many real world situations. As I said before, bigger equals better when it comes to image quality. Full frame sensors can deliver a much sharper, smooth image at higher ISOs than a cropped sensor can. For those who work in dim light, this is quite a benefit. If you're a photographer who uses a lot of wide angle lenses, a full frame body is the best choice, since you'll have the most options. New cameras such as the Canon 5D Mark II make it easier to afford these cameras, as well.
Overall, choosing your sensor format shouldn’t be the only factor that you take into account when choosing a new camera, but it should be a major one. The image quality and dim light capabilities of a full frame sensor will blow you mind, if you can handle the price. Otherwise, you might be better off saving your money and getting a cropped sensor camera. Either way, you can still take great pictures.
CANON EOS Rebel XSi 450D NEW Digital Camera
Posted on October 10, 2008
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Canon’s new EOS Rebel XSi 450D NEW Digital Camera includes quite a few features new to the EOS brand of Canon camera’s. This camera once again exceeds the abilities of Canon’s intermediate SLR digital camera, the Canon EOS 40D.
The Canon EOS Rebel 450D has a 12.2 mega pixel CMOS sensor, a nice 3 inch LCD screen, an improved 9 point auto focus sensor function and a DIGIC III processor that is capable of taking 3.5 frames per second. The new Live View mode offers an improvement over the 2007 models, offering both advanced features in contrast detection and phase detect modes. The EOS also offers an integrated cleaning system that removes dust in both pre and post image capture modes. Picture styles are also included , with a slightly updated interface.
The overall weight of the camera is quite low also , at 19 ounces. This is thanks in part to a new advanced battery and the switch to SD/SDHC storage compartments. The cost for the body of the camera alone is $799 and with the IS lens kit it will go up to a MSRP of $899.
BASIC FEATURES INCLUDE:
-12.2 Mega pixel, 22.2×14.8, 14-bit RGB CMOS sensor that delivers 4,272×2,848 pixel images
-Single-lens reflex digital camera with interchangeable lenses
-Variable ISO
-TTL optical viewfinder with detailed information display and in-depth-of-field preview
-3 inch TFT LCD with 230,000 pixels with Live View display mode
-Shiftable Program AE, Automatic, Shutter Priority, Depth of field AE, Aperture Priority and Manual exposure modes, plus Landscape, Portrait, Close-up, Night-Portrait, Flas Off and Sports programmed modes
-Variable white balance with automatic, six manual presets and custom settings
-Color correction function with bracketing function
-Flash exposure lock function
-Adjustable exposure compensation
-Auto exposure bracketing
-Image storage on SD or SDHC memory cards
-Electronic self-timer with a fixed duration of 2 and 10 seconds
-Shutter speeds from 1/ 4,000 to 30 seconds
-Bulb setting for longer exposures
SPECIAL FEATURES
-Live View mode with two focusing modes: Quick, phase-detect mode and Live, contrast-detect mode
-Dust reduction technology
-Picture Style menu with six different presets plus settings for contrast, saturation, sharpness and tone.
This digital camera’s features will help you get better images in all kinds of situations. Canon has once again, created an impressive camera. The image quality, performance and utility makes the Canon EOS 450 Xsi a top pick for great value and great-looking pictures.
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