PTX is an image extension attached to RAW photos taken with a Pentax camera. Also known as "digital negatives", RAW images record image data exactly as perceived by the camera's lens and sensor, without any additional correction of color, brightness or focus. Some models of Pentax cameras also include PEF as an additional extension for shooting in RAW mode.
The quick and simple way to handle your files is to get a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch conversions. As you will soon realize, reaConverter will help you avoid spending countless hours trying to figure out how to convert multiple PTX files as once.
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