Buy Extech LIGHT METER WITH MEMORY EASYVIEW 30 SERIES Product ID: EA33Extech LIGHT METER WITH MEMORY EASYVIEW 30 SERIES Product ID: EA33 Product Description:
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LIGHT METER WITH MEMORY EASYVIEW 30 SERIES
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1 of 2 people found the following review helpful.
A very good lightmeter
By Roy S. Miller
This is sensitive, usable and accessible. It is usable to maybe 0.2 lux ( there is an uncertainty of 5 digits and the lowest range is 00.00 - 99.99 ) ( this is about EV -4 which is about the illumination of a gibbous moon ) 2.56 lux corresponds with EV 0; ISO 100 / 1 second / f/1.0. Therefore, 0.2 lux is roughly 3 minutes at f/4.0. The response of the unit corresponds with the CIE photopic curve.From an accessibility point of view it has a large display with large digits and there are no blinking icons, etc. There is a running elapsed time display but that can be turned off but one button push. The RTC ( real time clock ) has weird blinking but I don't use it. This is one of the few lightmeters that I can use. ( The Gossen Starlite and all, or almost all, of the Sekonic lightmeters are NOT usable because of blinking displays that cause seizures in susceptible individuals. This is extremely poor design for such high end units. A recently discontinued Sekonic meter is perfectly accessible and usable. It is an absolute joy to use because the display is totally "quiet". Naturally, it was so good that Sekonic had to discontinue it and market these worthless units. One of the Sekonic units, the L-358 FlashMaster is unpleasant to use and has a noisy inverter for the backlight. ( If you are in a very quiet place it is very annoying. I noticed this in an 18dBA location ). Also, the Sekonic L-758DR is totally inaccessible to epileptics because of blinking. This is the most egregious example of ANY piece of equipment I own. It is truly obnoxious. )( If you are looking for extremely high quality light sensors, look up UDT ( United Detector Technology ). I use them for measuring the flicker / ripple of LCD computer displays in particular. If you have epilepsy, note that you should use low flicker / ripple displays. The one that I am using measures about 1% ripple. There is a large variation in displays. I believe the model of the particular sensor is 10AP. It very closely follows the CIE photpic curve. It has a BNC connector so that you can connect it to a high sensitivity oscilloscope ( it helps to use a preamp such as the one produced by Stanford Research Systems. ) BTW, the Extech can NOT be used for this purpose )
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