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01-06-2009, 01:01 PM   #1
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K200D Write Speed

Hello, everyone. I'm new to this Web site and have only owned a Pentax for about six months. But I've been a photo enthusiast for about 35 years.

This is a pretty basic question, but I can't seem to find a solid answer anywhere. I ran a few searches on this site and even e-mailed Pentax last week. No response yet.

Can anyone tell me definitively what is the write speed for the K200D (and even the K20D, for possible future application) from the camera's buffer to the memory card?

I'm trying to decide if SanDisk's new 30mb/sec version of its Extreme III SDHC card will benefit my K200D. I currently run the 20mb/sec version of the Extreme III.

As most of us know, the K200D's burst speed isn't the fastest - but some cameras respond to faster cards more than others. If the K200D will actually be helped by the faster card - even slightly - I'm prepared to pay the extra money. But there's no reason to burn cash if the camera's write speed is actually below 20mb/sec.

Thanks for your time and here's looking forward to interacting in the future.

01-07-2009, 10:17 AM   #2
MGV
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Pentax K200D Review: 10. Performance: Digital Photography Review


File Flush Timing

2 GB SanDisk Extreme III SD
2 GB Lexar Pro 133x SD

Image type SanDisk Lexar aprox size
3872 x 2592 RAW 2.7 2.8 11,000 KB
3872 x 2592 JPEG *** 2.2 2.2 4,100 KB
3872 x 2592 JPEG ** 2.1 2.1 2,100 KB

*1The K200D begins writing approximately 0.7 seconds after the shutter release is pressed so you must subtract this 'processing time' from the timings above to get the actual write time.


Best write speed is about 5.5 Mb/sec (11Mb/ (2.7-2)
01-07-2009, 06:52 PM   #3
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Thanks MGV... it's very good to know that even a relatively inexpensive SanDisk ultra 2(15mbs) is pleanty fast for this camera. Especialy since I already have a couple in 4Gig.

As a side... I seem to get close to advertised multi shot performance using these cards. (I say "close to" more in part due to my timekeeping than the preformance of the camera)
01-08-2009, 08:34 AM   #4
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I know when it came out, it was said that the Nikon D90 was the only card that could fully take advantage of the 30Mbps write speed, so you're safe with the 20Mbps!

So maybe the only difference would be faster transfer to your computer (or maybe not, depending on how you transfer).

01-09-2009, 04:47 AM   #5
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I came to the same result as MGV (5.5MByte/sec) but just by reading the manual (max storage capacity of 10M/*** JPEG and continuous lo shooting spec).

However, we don't know what happens inside the camera. It might well be that additional bytes are written (e.g. file allocation table; quite small compared to the file) or that data is read back for verification. So I'm very reluctant to say that 5.5MByte/sec is the final answer.

WimS
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