VIDEO CAMERA 1998

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ASK RICK -- September

 

COPY

SUPER FIDDLE?

I was particularly interested to read the review of the Panasonic NV-SX30 camcorder  (Video Camera February 1998) as I have just received one as an insurance replacement for a NV-S70.  The latter, I found, was an excellent performer. I was therefore concerned to see that your review was not very complimentary about the SX30. Resolution was quoted at around 350 lines, but Panasonic advise that to be classified as an S-VHS format machine, the resolution must be 400 lines.

 

This suggests the camcorder is not what it claims to be, i.e., it is not up to S-VHS standard. Clearly there are major implications of product mis-description here. I would welcome your views on this point. Incidentally, even Panasonic agree that the location of the microphone is not ideal and it is prone to picking up internal noise.

David Clough, Leigh, Lancs

 

I would be very interested to know where you got that information about Super VHS. Panasonic and JVC have always been very careful about making performance claims for the format, and have never -- to my knowledge -- stated that a resolution of 400 lines was an integral part of the specification. Super VHS is a sub-format of VHS and uses modified signal processing techniques to cram more information on to the tape. The figure of 400 lines resolution was bandied about in the early days as a comparison with standard VHS resolution (250-lines on a good day) and as illustration of what could be achieved. Out of the scores of Super VHS and S-VHS-C VCRs and camcorders I have reviewed in the past ten years, only a handful ever achieved the magic 400-lines, 350 to 380-lines is entirely typical.  

 

QUALITY ISSUE

I have recently upgraded to Hi8 and following discussions with my son-in-law -- who owns a Canon UC-C9Hi -- I went one step further and purchased the UC-X40Hi. I am very please indeed with the capabilities of the machine, especially with picture quality when played back on my Sony TV, which has an S-Video input on the SCART socket.

 

However, there is a significant quality loss when copying recordings on tape, using my JVC HR-825 VCR, which is understandable, given that it is not a Super VHS machine. I intend buying an S-VHS video recorder and due to my limited budget I would like your advice. As the UC-X40Hi has good editing facilities I am not too concerned by this side of the operation. Would the JVC HR-S7000 be suitable, it seems to be well discounted at the moment?

 

I am concerned about playing back edited copies of S-VHS recordings. Will they play on ordinary VCRs or will they have to be played back via an S-Video connection?

Mike Winn, Barlborough, Derbyshire

 

As you may or may not have heard JVC are about to knock an almighty hole in the S-VHS VCR market with the imminent launch of the HR-S7500. In case you missed the announcement, it's going to cost just £350, no that's not a mis-print, a well featured Super VHS VCR for about the price of a good stereo VHS machine. You need look no further!

 

As far as playing back S-VHS recordings is concerned, it can't be done on the vast majority of normal VHS video recorders. A few models have what is known as SQ-VHS or 'quasi-S-VHS' replay, but this is a comparatively rare feature and playback quality is only up to normal VHS standard. The usual method is to edit from Hi8 to S-VHS, and use this as the master recording, to run off VHS copies. Although they will be third generation recordings, the quality can still be quite good, compared with a third generation VHS recording. You can also replay direct from the VCR to the TV, and if you use the S-Video connection you will get the best possible picture quality.

 

PORTABLE PLEA

Surely I cannot be the only person in the world who wants to run a video recorder and camera from a 12-volt supply? No, a camcorder will not do! Ideally I want a 12 volt VHS recorder, that is robust enough to fit in a car or even a motorcycle, which has the ability to record from a camera fitted on the vehicle. Have you any suggestions where I could buy one or do you know of anyone who has a reasonably priced portable machine -- I seem to remember Ferguson had one, with a socket for a remote camera.

G.J.Kemp, Taunton, Somerset

 

No, of course you're not the only one who wants to use a video recorder in a car, but why does it have to be VHS? Sony makes an excellent portable Hi8 recorder -- with a fold out LCD monitor screen -- called GV-A500E. Their pro division has even smaller units available that can fit in a pocket.  The A500 is small and light and sounds as though it would be ideal for your purposes, and yes, it can easily be run from a 12 volt DC source. There used to be quite a few portable VHS decks on the domestic market (Ferguson badge engineered several JVC portable decks in the early eighties), but as far as I'm aware no-one makes them any more. You can still get professional S-VHS machines but they are horribly expensive, you won't get much change out of £2000! The only other solution is to scour the second-hand ads, or get in touch with specialist dealers, such as Video Action (0181-209 0909), who might be able to point you in the right direction.

 

DUE PROCESS

I haven't been a camcorder user for very long so I'm not too familiar with the jargon or the gadgetry. Can you tell me if a voice processor is another name for an audio processor, and if they're not the same, what do they do?

Wilson Davidson

Newport on Tay, Fife

 

Teccy terms like these tend to be bandied about by consumer electronics manufacturers but a lot of the time they mean very little, or are misleading. Strictly speaking a voice processor is an electronic circuit that operates on the narrow band of audio frequencies we use for speech. They pop up in various devices, such as mobile telephones, where they're used to make speech more intelligible, by filtering out unwanted noises and sounds, or by boosting certain frequencies. The definition of an audio processor is even vaguer; in fact it could be anything from a simple tone control or equaliser to digital signal processing. That's where microchips mangle and manipulate sounds in all sorts of interesting and unusual ways, to create various special effects, such as spatial and surround sound.  

 

TRANSFER DEAL

I have a Panasonic S-VHS video recorder, which I use in conjunction with my Panasonic S-VHS-C camcorder. I am thinking of getting a digital video camera, will I be able to transfer digital tape recordings to S-VHS and VHS tape, via my VCR? Will they be of better quality than transfers made via an ordinary VHS video recorder? May I also ask if Hi8 tape copies would likewise be possible?

B. Irving, Barnsley, S. Yorks

 

Yes, you can easily copy or edit recordings made on a digital camcorder to any video recorder, irrespective of format because all camcorders, digital or otherwise, have standardised video signal outputs. There's two, the first is called 'composite' video, and this is where all the key elements in a video signal (brightness, colour and synchronisation information) are bundled together. The second type is 'component' video, also known as 'Y/C' or 'S-Video'. In this case the colour (C) and brightness (Y) parts of the video signal are processed and conveyed separately, to prevent them interacting with one another. Component video images look cleaner because they suffer less from cross-colour effects such as moiré and herringbone patterning. Some digital camcorders also have a 'digital' video output, (aka FireWire or IEEE1394 interface), but this can only be used with other digital video products, like digital video recorders PCs and editing equipment. (There's also RGB colour signals, but they're mainly confined to specialist applications and PCs).

 

The only real problem with connecting camcorders to VCRs, TV and editing or post-production equipment, is the diversity of connectors. Component/S-VHS connections are usually okay because pretty well everyone uses the 6-pin Hoshiden or mini-DIN plug and socket. With composite video you will probably find a phono (aka RCA or cinch) socket on the camcorder, and a SCART or phono sockets on the equipment it is to be connected to.

 

As far as quality is concerned, an S-VHS or VHS copy of a digital recording will look as good as the VCR allows. In other words, the signal from the digital camcorders contains more information than any domestic analogue VCR can handle. Likewise, a VHS copy of a Hi8 (or S-VHS-C) recording will look as good as a first generation VHS recording because high-band (Hi8 and S-VHS) recordings contain more information than standard VHS.

 

FOCUS OF ATTENTION

Whilst in Australia my Sony CCD F370 was damaged and could not be repaired so my wife bought me a CCD TRV14E and also a VCL 0637A conversion lens which must be used on manual focus setting.

 

I followed the instructions in the manual and tried focussing through wire and nets but the results were disappointing.  I received your test report on the TRV14 but there were no observations on using the focus dial. 

 

On my F370E I always used manual focus so I had clear pictures to infinity and cut out the hunting for focus.  I know the TRV14E is all right because I have made some good and clear recordings. Could you please help me by explaining to me how I use the focus wheel?

F. Goff

Newport, Shropshire

 

The TRV14 uses an indirect, servo-operated focusing system, it's also known as an 'inner-focusing' mechanism, because all the moving parts are inside the lens barrel. This allows manufacturers to make smaller, lighter lenses, but it means the moving parts cannot be easily adjusted from the outside, hence the use of a small internal servo motor, that's controlled by the thumb wheel. It's not quite as fast or responsive as the purely mechanical focusing you're used to on the F370, but it covers the same optical range, and you have to get used to the fact that there are no end-stops. Once you've reached the near or far limits of the lens the thumb wheel just keeps on turning. There's no reason why you shouldn't be able to manually focus the TRV14 when the VCL-0637 wide-angle conversion lens is attached; it's simply a question of getting used to it.

 

SPOT THE DIFFERENCE

At present I own a Panasonic MS4 video camera and although I am very happy with its performance, I have heard that the Panasonic DP800 is also a very good video camera.  I have tried to get as much information on the above; however, the details have been vague.  Can you please outline the main differences between the two in respect of accessories, quality and price?

B. Sames Clarke

Donnycarney, Ireland

 

There are some superficial similarities between the Panasonic NV-MS4 and AG-DP800. They're both full-size Super VHS camcorders and from a distance they look alike, but that's about as far as it goes. The MS4, launched in '92 is a domestic camcorder originally selling for £1400; today, a good example is worth around £300. It has a single CCD sensor, 12x optical zoom (100x digital), stereo hi-fi sound, various digital effects and a good assortment of manual exposure controls. The DP800 is a semi-professional machine, launched in 1995 and currently selling for around £3800. It has a triple CCD image sensor, bayonet mounted 14x zoom lens, 4 channel audio (2 x hi-fi, 2 x mono linear), numerous manual adjustments and advanced digital signal processing. Surprisingly the differences in picture quality are not that great, the AG-DP800 will produce a slightly cleaner, sharper looking image, than the MS4 and colours should be crisper and more accurate too, thanks to its triple CCD image sensor, but the most telling difference is the weight. The DP800 is over a kilogram heavier, and that indicates a tougher, more hard-wearing body and heavy-duty components designed to take the knocks and last longer in the hard-working professional environment.

 

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ã R. Maybury 1998 2206

 


 

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