Thursday, November 14, 2013

What lens brand does a JVC camcorder sports?

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Shahram J


We know that panasonic uses Leica or panasonic lens, and Sony uses Carl Zeiss lens. What about a JVC camcorder?


Answer
Most of these companies don't make lenses in their consumer divisions so they buy them from a company or commission them. It's hard to say if they get them from a company like Tokina in Japan or from a Chinese company.

Leica, Schnieder and Zeiss generally make their lenses at Japanese plants although Schnieder may now have a Chinese plant.

Even Canon, who makes lenses, probably don't make them for the consumer cameras.

Today it's all computer designed and outscourced to a company or purchased as mass produced items.

Sometimes they even use plastic lenses because that's all they can find in the right shape from a company.

YOu don't get good lenses until you get into interchangable lenses in the professional lines.

The diaphragms are generally a double bladed vein that works with a magnet.

Optical experts judge a lens by its star pattern and you won't get much of a star with camcorder lenses.

You want to see this in action, there's a shot in the movie Serenity looking right at a light and there's a 16 to 24 star pattern comming just from the diaphragm of the lens.

More than likely either a Panavision lens made by Cooke or a Taylor-Hobson-Cooke which are considered to be among the best lenses made.

The more points the star pattern has the better the lens is considered to be...

What is a good camcorder for recording sports like running/hurdling with little or no blur? Frames per second?




mike


I am a college track athlete who sprints and runs hurdles I really want 2 improve on my form and break down my races this year. Though I know a lot about hurdles I have no clue what 2 look for when it comes 2 camcorders. Help me please. Any suggestion is much appreciated.


Answer
High frame rate cameras or pro-grade cameras with "overcranking" capabilities are expensive - but it is possible to do.

A more cost-effective method is pretty much using any camcorder with the capability of increasing the shutter speed a lot - then using the video editor in your computer for slow-motion playback or frame-by frame playback in the computer or on the camera.

How are you expecting to position the camera, start recording and stop recording? I hope you have a "helper" do that for you.

I've recorded football games and basketball games using a shutter speed of 1/1000 second and there is very little/no blur when reviewing frame-by-frame. When the shutter speed is faster than this, the video image will darken because the shutter is not open long enough for the light to come in through the lens and get collected by the imaging chip(s).

Stay away from high compression video formats - like AVCHD. The video recorded by these hard drive, flash memory or DVD based camcorders is not so good because of the way they interpolate the information between frames. DV/HDV onto miniDV tape is most common in consumer camcorders (for standard definition, Sony DCR-HC62, Panasonic PV-GS320 - among others; Canon ZR960... for high definition, that starts at the Canon HV40). DV/HDV format - whether to miniDV tape, flash memory (Panasonic AG-HVX200 redords to DVCPRO HD; Sony HVR-Z7U) or hard disc drive (any miniDV tape based camcorder compatible with a Focus Enhancements FireStore drive) should be fine.




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