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07-24-2010, 01:17 AM   #16
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QuoteOriginally posted by RolloR Quote
DSLR shallow DOF and no autofocus can actually work against you.

Explain... Please!

07-24-2010, 04:31 AM   #17
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Depending on what you are videoing, it can be really tough to track action if your depth of field is quite narrow. To me, most of the time, you really want more depth of field when capturing video -- minimum f4, maybe f5.6. If you are getting video of someone just sitting and talking, then narrow depth of field is more achievable.

It can be frustrating if you take a lot of video and it turns out that you were a little out of focus the whole time.
07-26-2010, 11:57 AM   #18
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QuoteOriginally posted by sagiboy Quote
I have an HV30 and the video quality is out of this world..nice crisp HD video!! Tape quality is way better than HDD or flash memory as they compress the video a lot. Consider this, a 60 min Mini DV tape can hold over 13GB data and most of the HD camcorders with built in memory has 32GB or 64GB ( in the affordable range) and boast of recording up to 12 hours or more. It compresses the video so much that you can see the loss in detail when blown up on a 52" TV.
You're comparing apples to oranges. Specifically maximum recording quality (minimum recording time) of HDV to minimum recording quality (maximum recording time) of AVCHD.

13GB for 60 minutes = 3.6 MBytes/sec = 29 megabits/second. HDV is MPEG-2 based. (Actual specs I have seen for HDV indicate it is only capable of approx. 25 megabits/second.)

AVCHD is capable of up to 24 megabits/second, so only slightly lower than HDV, HOWEVER it is MPEG-4 AVC based. MPEG-4 AVC can provide significantly higher quality than MPEG-2 given the same bitrate. In fact, MPEG-4 AVC could probably be dropped to below 10-15 megabits/second and still match MPEG-2 at 29 megabits/second in quality.

Tape-based camcorders have to deal with the following:
1) Mechanical failure is MUCH more likely
2) Far less shockproof (really just another factor of 1) above)
3) Motor noise being recorded in the audio (hard drive based units have the same problem)
4) Media longevity issues - while flash memory has write cycle limitations, they are capable of FAR more write cycles than a tape is capable of without wearing. Also tapes degrade far more readily than flash memory
5) Loading video from a tape-based camcorder to a PC can only be done in real time, so it takes 2 hours to offload 2 hours of video. A flash-based SDHC card can be fully copied in minutes.
6) Ooops, forgot this one - Tapes reached their limitations of cost reduction a long time ago. Being a relatively large mechanical device, they haven't gone down significantly in price for close to a decade. Meanwhile, flash memory price/capacity is still tracking a curve pretty similar to that predicted by Moore's Law (Doubling of capacity for the same price every 18 months or so - the exact doubling period may be different, however it is still an exponential growth in capacity every couple of years. Tapes have basically stayed the same for a decade.)
07-26-2010, 12:12 PM   #19
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The K-x is 24 fps, a format that can cause editing problems ins many consumer programs. These programs usually upsample to 30 fps for editing, which can put sound out of sync and cause other anomalies.

07-26-2010, 05:15 PM   #20
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I see no reason to compare the HV40 to the K-x.

The Hv40 is a dedicated video camera and the K-x is not.

Simple, really.
07-27-2010, 07:28 AM   #21
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Not really, when 20 people tell you to go one way and the rest the other it Isn't.

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