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Pentax K-X

We haven't had a chance to fully test this product yet, but we've assembled this helpful overview of relevant information on it.

The Pentax K-X  gives users 12.4 megapixel resolution with a CMOS sensor and Pentax Shake Reduction. The camera has a 4.7 fps capture rate with a max 1/6,000 shutter speed. It has an 11-point wide-angle autofocus. An optical zoom of 3 x is available. HDR image capture is available. You can capture widescreen HD video at 720p resolution at 24 FPS. To view the images this model has a 2.7 inch LCD screen with which you can use Face Detection and Live View to make on the spot photo changes. SD/SDHC memory card compatible. It has an ISO range of 100 to 12,800.

Features List:

- 12.4 megapixel resolution

- CMOS sensor

- Pentax Shake Reduction

- 4.7 fps capture rate

- 1/6,000 shutter speed

- 11-point wide-angle autofocus

- Optical Zoom 3x

- HDR image capture

- Widescreen HD video recording at 720p resolution at 24 fps

- 2.7 LCD screen

- Live View, Face Detection

- SD/SDHC memory card compatible.

- ISO range 100 – 12800

Digital Trends’ digital camera buying tips:

What about memory cards?

There is no universal memory card to fit all digital cameras – not yet, anyway. Based on internal politics, design considerations and financial reasons, individual camera manufacturers typically adopt a particular style of Flash Memory card for their cameras. Some manufacturers will even split their alliances – one type of memory card for professional-level cameras, and another type of memory card for consumer level cameras. When buying a new Flash Memory card, remember which camera you have and the type of card it requires. Some camera snobs (like your humble writer) will even selectively buy a digital camera based on the type of Flash Memory card they prefer to use!

The most common types of Flash Memory cards are:

Compact Flash, or CF – Roughly the size of a silver dollar (though not round), the CF card is one of the earliest types of Flash Memory cards and is most often used in professional or semi-pro digital cameras.

Secure Digital, or SD – Roughly the size of a postage stamp, the SD Card is available in a wide range of storage capacities. It’s inexpensive, durable and amazingly lightweight.

Memory Stick or Memory Stick Pro – About the size of a small stick of gum, the Memory Stick is meant for Sony Digital cameras.

XD-Picture, or XD Card – Typically found in Fuji and Olympus cameras, the XD Card is about 40% smaller than the SD card.

What are some basics I should look for?

Your new digital camera should have these key features:

  • At least a 6MP imaging device for a D-SLR
  • At least a 7MP imager for a point-and-shoot
  • Optical zoom of 3x, not just a digital zoom
  • The highest quality optics
  • A large LCD screen; the more pixels, the better the quality
  • The widest range for aperture (f/stops), shutter speed and ISO
  • An AF Illuminator or AF Assist mode for best flash shots in dim light
  • A variety of Scene Modes for more convenient shooting in a variety of situations
  • Make sure you do your own ergonomic hands-on test

Memory card buying tips

Name Brand: Buying a name brand memory card can sometimes cost an extra few dollars, but along with the name comes a trustworthy company, a good warranty, a generous exchange policy and a reputation for stability – something that’s much more critical than it sounds.

Speed: Not all Flash Memory cards are created equal. Some are terribly slow and others are turbo charged for high-end digital photography. True high-speed Flash Memory cards will have their speed ratings prominently displayed, whether on the card itself, the product packaging or both. You’ll see ratings like 80X, 133X, 266X, or perhaps 8MB/second, 20MB/second or 40MB/second. If you don’t see this number, inquire with a sales rep. If they don’t know or if the manufacturer hides this info, don’t buy the card. Look for a card that has at least a 9MB/second or 60X rating. Why is this speed important? If you’re taking numerous photos in succession, you don’t want the camera to stop taking photos so it can slooowwly save the images to the memory card.

Storage capacity: There are many factors that affect how many photos you can store on a single card – how many “megapixels” the camera is rated for, whether you’ve selected highest-quality photo settings or if you’ve set your camera to take slightly smaller photos. For example, an 8 megapixel Canon point-and-shoot camera can fit around 2,200 high-quality photos on an 8GB Secure Digital card. By this standard, even a 1GB memory card could hold up to 275 high quality photos. A whopping 16GB card could hold nearly 4,400 pics! That’s a lot!

Don’t Buy Til You Try

One final bit of advice. Never, ever buy a camera purely on its specs or a few positive reviews. What looks good on paper, and what feels good to one person, isn’t necessarily going to be the perfect camera for you. Patronize shops that allow you to spend a lot of hands-on time with your prospective models. Cameras are extremely touchy-feely products, and the truth is that most of them include similar feature sets and take decent pictures. But they come in a wide variety of shapes and sizes, and you’ll be spending many hours with one of them in your hands. Long-term comfort is perhaps the most important factor of all.

How many megapixels do I need?

In 2000, the answer to this question was “more is always better.” In 2010, the answer is more likely “if you have to ask, you have enough.” Even the cheapest cameras these days typically pack eight or more megapixels onto a sensor, which produces superb 4 x 6 prints, all the way up to 8 x 10, and sometimes more. The physical size and quality of the image sensor along with the corresponding optics play a much bigger role in image quality than megapixels alone, so don’t be fooled into thinking more megapixels will produce better photographs. Unless you’re planning to blow up shots to poster or billboard size, any modern camera has enough resolution.
When you’re researching different cameras, manufacturers will state the maximum file (or picture) size you can take. In the case of a 6 megapixel (MP) camera, it’s 2816 horizontal pixels x 2112 vertical pixels, with 7MP it’s 3072 x 2304 and so on. Simply multiply the numbers and you get the effective resolution of the imaging device. We suggest you avoid anything less than 6 or 7MP at this point unless you’re looking for an inexpensive camera for the kids.
Pros have access to 21-megapixel imagers in very expensive D-SLRs. You don’t have to go this route or spend that much money for great everyday photos. However, 6MP should be your minimum and if you plan on making very large prints, such as 13x19s, or you feel you’re going to experiment cropping photos with imaging software, consider 8- or more megapixels. There are no hard and fast rules since so much depends on your final end use