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Ask the Experts with True Lens Services

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Why should I have a lens serviced?A camera lens is not actually a sealed unit, though it may look as though it is. When you pull focus or zoom the lens, cells of glass within it start to move which results in pressure being created on one side of the cell and a partial vacuum on the other. This vacuum will suck in the surrounding air and any airbor...

Submitted by Dennis Lennie

Published 01 April 2009

Mobile communications Eye to Eye

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Point to point communication via satellite is one of the most useful tools available to television and radio reporters in a world of fast news distribution. This short summary looks first at some of the newest SNG link kit and then at broadcast-related telecoms. Advent Communications has introduced an enhanced version of its 1.5m and 1.8m NewSwift...

Submitted by Dennis Lennie

Published 01 March 2009

Surround Sound For HD Broadcast

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While 2008 may not be fondly remembered as a classic year if you work in certain industries, it's a fascinating time to be working in video media production or broadcast television. The steady move to high-definition at all stages of the video production process, is causing the biggest shake-up in technology and working practices since the introduc...

Submitted by Dennis Lennie

Published 01 February 2009

RF Condenser Microphones why they are so good in the wet

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A question I am often asked when people discover who I work for is “Why are ‘RF condenser’ microphones so good in the wet, being so much less susceptible to humidity problems than the more common ‘AF condenser’ microphones?”Basically, AF capacitor microphones use the capsule as a capacitor to store charge. With one fixed plate and the other free to...

Submitted by Dennis Lennie

Published 01 February 2009

Audio acquisition and production

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Remembering the days when the average 'portable' sound recorder was heavy enough to induce a hernia, I have high respect for the capabilities of modern digital audio devices. Not least the solid-state recorders that have emerged as successors to the Sony-originated DAT and MiniDisk formats. But avoid anything that lacks XLR connectors unless you ar...

Submitted by Dennis Lennie

Published 01 February 2009

How to choose a Microphone

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The microphone is probably the most important tool we use when recording sound. Plugging it into the best pre-amplifier will optimise the quality of the signal but no amount of processing will fix the wrong sound coming from your microphone. The device for turning movements in the air into an electrical signal is a creative instrument and should be...

Submitted by Dennis Lennie

Published 01 February 2009

Is it cool to use cool lighting

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Is it cool to use cool ?The term ‘cold lighting’ is used within the film & TV lighting industry as a generic term for energy efficient, Fluorescent, LED, and Plasma (panel) lighting sources which emit little or no radiant heat. HistoryThe technology is not so new; Evidence exists of neon lighting being used on a film set in Teddington Studios Engla...

Submitted by Dennis Lennie

Published 01 August 2008