4Gb CF Card Announced

An anonymous reader writes "Lexar has today announced that it now shipping a 4 GB 40x Compact Flash card. The card's claim to fame is the ability to store 600 RAW images taken with a 6 megapixel digital camera. This card also features Lexar's WA (Write Acceleration) technology which can improve performance further with WA enabled cameras. Because this card is larger than 2 GB, you will need a camera which is FAT32 compliant. This card is available now at the heady price of $1,499 ($0.37/MB). It looks like Lexar has managed to be faster then Hitachi (Former IBM storage division) with their 4Gb Microdrive."

Comments

Re:Why?

[foxtrot]

You are never going to be able to take that many pic's without changing batteries so why not have a couple of cheaper 1GB cards and swap em out with the batteries? 1GB CF cards are as cheap as $228 you are paying a more than 50% premium for the denser storage.

Won't I? I already can almost fill my 1GB microdrive using just one BP-511 battery pack on my Canon G1.

The new SLR Canon cameras have an optional side-grip that holds two more BP-511s. And they're shooting much larger images. And when you're a professional (or semi-professional), which is what this product is aimed at, you're probably not shooting .jpg anymore. Plus, since this thing is CF and not a Microdrive, it sucks less power, as well. I'd bet you can darned near fill one of these things easily.

Add in the fact that this thing has some new technology write-to-it-faster-stuff, and there's plenty of reason for this product to exist.

-JDF

NONONONO

[imsabbel]

There is a HUGE difference between png/tiff vs jpeg and raw vs jpeg.
Raw isnt just lossless compression, but rather using the direct output of the image sensor. This preserves a higher dynamic range (like 12bit per pixel) and you can later set a white balance ect in your computer.
Just make a underexposed picture with jpeg and try to salvage anything with photoshop. All formerly dark areas will be a happy 8x8 macroblock land...

Re:Why?

[Mozo]

The "Real Story" link on JPEGs is quite amusing, to say the least. Saying "look at these images in your web browser -- you can't tell the difference" hardly leads to the conclusion "people never need to use uncompressed images, since there never are visible differences."

I *do* work for a professional imaging company, and here are some of my opinions on "the real story":

- JPEG is designed to compress images in ways that degrade the visibility of compression artifacts as much as possible. It works particularly well for photographic images, since that's what it's designed for.
- JPEG compression is often very appropriate for web images. Uncompressed images are often inappropriate for web images, due to their size.
- JPEG does produce artifacts, and many are objectionable at high compression levels.
- Even mild JPEG compression does visible damage to things like crisp text or sharp lines. This is a function of the compression scheme's photographic emphasis. (And, specifically, a function of the 8x8 pixel blocks and discrete cosine transforms used....)
- JPEG2000 (.JP2 or .JPX) is a more sophisticated technique employing wavelets. To my eyes, the artifacts (especially localized ones) are significantly less noticable than standard JPEG at similar compression levels. A technology to watch...
- Digital SLR "RAW" files are different than standard uncompressed tiff's. Usually, they represent raw sensor data at higher than 8-bit color depth. As such, they are the digital equivalent of the negative, and various different kinds of post-processing is often applied to the same image, based on situation.
- Compression isn't free (as in clock cycles). It takes a lot less time to write the larger RAW file from a DSLR to a CF card than it does to compress it in-camera to a smaller JPG file. This effects burst rate image capture as well as battery life.

Phew. That was long. The conclusion that "there's really no reason to use raws over jpegs" was wrong on so many levels that I had to clear some misconceptions up, I suppose!