home brewer wrote:
I just started using light room and I have started to wonder why i need all those jpegs when I have a NEf that i con-convert to jpeg as required. Is there any advantage in having the jpeg readily available? I you think I am being foolish be kind
thanks
Not foolish...
There are perfectly reasonable reasons why you would record both types. Usually, JPEGs created in the camera are used IMMEDIATELY, or for security or anti-tampering purposes. Raw files are used for images that need to be adjusted after photography for best use cases. Some forensic agencies insist on JPEGs from the camera. Some news organizations insist on JPEGs from the camera so they know they are unretouched (i.e.; not faked in Photoshop). School portrait companies (who sell MILLIONS of portrait packages each Fall) use precisely controlled, all-JPEG workflows to reduce the need for processing power, network bandwidth, processing time, and labor.
ON THE OTHER HAND,
Those who are making images for critical applications probably use JPEGs ONLY for proofs. They process raw images for maximum image quality, flexibility in post-processing, creative control, etc. Unless they need the JPEG for a specific reason, they save raw files at the camera, then process them afterwards. The result could be a TIFF, a JPEG for a lab or the Internet, or a print "converted on the fly" from the raw file.
Personally, I have a JPEG workflow for some applications, and a raw workflow for others. They're just tools.
Raw workflow example:
Record image, saving raw file in camera.
Open raw image in Lightroom. (Image is converted from the camera raw data to a 16-bit bitmap image in the ICC color space, ProPhoto RGB)
Adjust image in Lightroom, in reference to a Lightroom proxy image, on a calibrated, custom-ICC profiled monitor. Use soft-proofing with printer profile for final adjustment.
Print from Lightroom, converting the raw file on-the-fly to a bitmap, which is then converted to printer input for a directly-connected Epson printer, using the appropriate paper/ink/printer profile.
Export image from Lightroom to a PSD file for Photoshop or a 16-bit TIFF file for other use or other conversion.
Export image from Lightroom as a JPEG in sRGB color space for printing via a conventional wet-process photo lab.
For my JPEG workflow:
I rely on exposure and custom white balance targets, plus carefully-controlled camera menu settings based on previous tests.
I tend to use JPEG camera capture when making large numbers of images of the same sort of subject matter, in controlled, consistent lighting environments.