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Posted by Smarty on 11/28/06 04:45
Larry,
PTravel actually did not, as you state, quote "lines of horizontal
resolution". He merely stated "it's resolution was limited to around 450
lines". It was, indeed, my error to assume he actually meant horizontal
resolution rather than vertical resolution, but his language was imprecise,
and my interpretation was erroneous. I think we can all agree that the
common usage and vernacular in video discussions tends to use the term
"resolution" loosely in the way PTravel did, and I failed to either ask him
to clarify or to use the more common (horizontal) interpretation.
I have no knowledge of the specific camcorder or sensor involved in the
TR600. It was apparently introduced over 10 years ago, and the Hi8 format
was never broadly successful. It very well may be extremely good in low
light, have no lag, and have high resolution just as PTravel states. My own
use of Hi8 format camcorders, however, leads me to the conclusion that these
units struggle to deliver even 400 lines of horizontal resolution, and even
then add dropouts, visible chroma noise, and capture issues combining to
make green screen keying look crummy.
Since the original poster was looking for "the cheapest 'good' camera I can
get", I merely offered, and now repeat, that cheap MiniDV camcorders now
available in abundance make a lot more sense to recommend, rather than
suggesting that something like a TR600 or any older vintage, used camcorder
would be an alternative. PTravel's specific advice / reply was that there
was "nothing digital in your price range" and "nothing with good low light
performance" and Martin reinforced this position with his suggestion that an
analog camera was the way to go. His reply stated: "You're left to an
analogue format, and your best choice would be one
of the older Hi-8 camera's".
I feel both of these replies, taken individually as well as jointly, are
incomplete and misleading, particularly since the original post was
explicitly asking for chroma keying / green screen. The notion of taking the
very marginal video from these older analog cameras, thus requiring, in
addition, a capture card to convert their analog output to permit computer
chromakeying, is a recipe for disappointment.
I continue to believe that a number of the $400 price range MiniDV
camcorders, including ones cited previously, are a better solution.
Since the original poster has found a solution, this exchange is both
academic and moot, but I challenged the original replies hoping to provide
the OP with an alternative view.
Smarty
"Larry in AZ" <usenet2@DE.LETE.THISljvideo.com> wrote in message
news:Xns9888808047496thefrogprince@69.28.173.186...
> Waiving the right to remain silent, "Jukka Aho" <jukka.aho@iki.fi> said:
>
>> Smarty wrote:
>>
>>> <ptravel@travelersvideo.com> wrote
>>>
>>>> My TR600, an NTSC machine, did not exhibit smearing to any
>>>> significant degree, and no ghosting. It's resolution was limited to
>>>> around 450 lines, which was noticeably below what my VX2000 can do.
>>
>>> This is truly remarkable, since NTSC is a 525 line system which only
>>> displays, in the very optimal case, 480 active lines. The rest are
>>> hidden in the 45 line vertical blank interval.
>>
>> PTravel quoted "lines of horizontal resolution" figures. That's (ahem!)
>> a measurement of horizontal resolution, and it is measured by using a
>> resolution test target that has _vertical_ lines on it.
>>
>> You're confusing those figures with the number of "active" scanlines in
>> video signal, which has more to do with vertical resolution.
>
> A common mistake, which needs correction several times each month...
>
> --
> Larry Jandro
> Video Engineering & Equipment Rentals
> Scottsdale, Arizona, USA
> [Remove spamtrap in ALLCAPS to reply]
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