The definitive equipment listing for Prakticas on the internet
	Main  |  Camera Bodies  |  Lenses  |  Accessories  |  Photo index  |  Contact  Cameras -> Praktica L -> Praktica LTL The LTL of 1970 started a line of cameras whose production carried on until the end of M42 camera production at Pentacon. It incorporates TTL metering based on the stopped-down principle, with the CdS sensor placed at the front of the pentaprism, as in the super TL. Unlike the two preceding models with stopped-down metering, its combined stop-down and metering switch is located right next to the shutter release button, making its operation considerably more comfortable. Delay-action release was an optional extra on the LTL. While Pentacon recommended the use of a PX625 or PX13 mercury cell to power the meter, the LTL has the advantage over most contemporary cameras by incorporating a bridge circuit in the metering system. In other words, the LTL metering does not rely on the discharge characteristics of the mercury cell, nor does it depend on the peculiar voltage of the mercury cell. As the mercury cell is no longer legal almost everywhere, the substitution of the more available PX625A alkaline cell still enables the LTL metering to function correctly without the need for extra adapter or recalibration. Reflex camera with TTL metering system. Here, correct exposure of the photos is guaranteed by an automatic metering mechanism, the most important part of which is the modern method of through-the-lens metering. The well proven PENTACON internal light metering system by beam splitter and light concentrator is coupled with the setting means for film speed, exposure speed, and diaphragm values. Exactly that light which contributes to picture composition is measured in the interior of the camera. After having pressed the conveniently arranged metering key, the pointer within the viewfinder image is observed and centred on the circular mark. All factors having an influence on the measuring result, such as image angle of the used lens, or the prolongation factor resulting from the use of accessories, are automatically taken into account. Back | Index