No data for the image is lost, and it doesn't look like any EXIF is lost. I experimented with this a few days ago. I appended what I posted then.
I found it interesting that a PEF converted to a DNG creates a much larger file than just shooting DNG in the first place. You can see that the Pentax Browser displays more detail from the EXIF data than does the Adobe Camera Raw. None of this has anything to do with the image data. It's just more detailed info about the camera settings at exposure time. This was one little experiment. Anyone that has information to the contrary is welcome to chime in. See you later, GS <http://georgesphotos.net> --------------------------- I shot two more or less identical images with the K10D. Image one was PEF. Image two was shot with in-camera DNG. I converted image 1 from PEF to DNG with the Pentax software, then compressed the DNG with the Adobe DNG Converter. Here are the file sizes - Image_1.pef 10,860 KB (original file) Image_1.dng 21,504 KB (after conversion with Pentax software) Image_1.dng 9,403 KB (after compression with Adobe DNG converter) I compressed image 2 with the Adobe DNG converter. Image_2.dng 16,460 KB (original file) Image_2.dng 9,579 KB (after compression with Adobe DNG converter) So, given this incredibly tiny sample of data, and the information in another post that mentions DNGs flow through the buffer faster than PEFs, I'll probably shoot DNG in the camera and buy a couple extra memory cards if I feel capacity is an issue. As a side issue, I spent about a half an hour, this morning, installing the new Pentax software and updating Photoshop and ACR. If you're into metadata, Pentax and adobe display different items. The Pentax Browser reads identical data from from PEFs and uncompressed DNGs. It didn't read any of the EXIF data from the compressed DNGs. Adobe Bridge reads a subset of the data from uncompressed and compressed DNGS. At this point it doesn't open the PEFs at all. Pentax Browser - Adobe Bridge Not listed - File Name Not listed - Document Kind (camera raw) Not listed - File Size (9.35 MB) Not listed - Resolution (240 dpi) Not listed - Bit Depth (16) Not listed - Supports XMP (Yes) Not listed - Orientation (Normal) Not listed - Custom Rendered (Normal Process) Not listed - Subject Distance Range (Close View) Not listed - Sensing Method (One chip sensor) Lens Name (smc PENTAX-DA 16-45mm F4EDAL) - Not listed Focal Length (45.0mm) - Focal Length (45 mm) Not listed - Focal length in 35mm film (67mm) Shutter Speed (1/4sec) - Exposure (1/4 s at f/5.6) Aperture (F5.6) - combined above Capture Mode (MTF priority program (HyP)) - Exposure Mode (Auto) Metering Mode (Multi-segment Metering) - Metering Mode (Pattern) White Balance (Automatic) - White Balance (Auto) Not listed - Scene Capture Type (Standard) Color Temp (---) - Not listed Fine Tuning A-B (---) - Not listed Fine Tuning M-G (---) - Not listed Sensitivity (800) - ISO Speed Ratings (800) Recorded Pixels (3872x2592) - Dimensions (3872x2592) Quality (RAW) - Not listed Exposure Comp (0.0) - Not listed Autofocus Mode (Single AF) - Not listed Autofocus Area Mode (Spot) - Not listed Color Space (sRGB) - Not listed Image Tone (Natural) - Not listed Saturation (0) - Saturation (0) Sharpness (0) - Sharpness (0) Contrast (0) - Not listed Drive Mode (Single Frame Shooting) - Not listed Flash Mode (Flash Off) - Flash (Did not fire, compulsory mode) Bracket (Off) - Not listed Extended Bracket (---) - Not listed Multiexposure (Off) - Not listed Shake Reduction (Yes) - Not listed Firmware/Software Version (K10D ver. 1.00) - Application or Software (K10D ver. 1.00) Shooting Date/Time (11/23/2006 10:03:27 PM) - Date Created (11/23/2006 10:03:27 PM) Not listed - Make (PENTAX Corporation) Camera Model (PENTAX K10D) - Model (PENTAX K10D) I'm also going to admit that I don't know if either program can be configured to display more data. If someone does know, please chime in. There are a couple of items in the list that I may not be paired properly. See you later, gs <http://georgesphotos.net> -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
