Camera Histograms


Link Posted 12/08/2008 - 22:27
Here's something to share with you all and get your thoughts and comments.

Being new to CS3, I did the usual thing and bought a variety of books on the subject. As always happens, the best one is the last one purchased (if I had bought this one first, would have not needed the all the others).

The book to which I refer is Adobe Photoshop CS3 for Photographers by Martin Evening. It’s just fantastic IMHO and full of good stuff.

This little gem just blew me away, (page 261 for those who have it) you know how we all check our histograms, well I quote

“The histogram that appears on a compact camera or digital SLR screen is unreliable for anything other than JPEG capture. This is because the histogram you see there is actually based on the camera processed JPEG and is not representative of the true raw capture. The only way to check the histogram for raw capture is to open the image via a raw processing program such as camera raw”

Is this the case for our beloved Pentax DSLR's K10D, K20D etc, or have I missed something?
Kerrowdown... Aka Romantic Highlander.

Hold Infinity in the palm of your hand... William Blake.

"Mistress" Pentax-A 15mm F3.5, "Good Lady" Pentax-A 20mm F2.8, "Friendly Lady" Pentax-A 24mm F2.8, "Deviate Lady" Pentax 28mm F3.5 Shift, "Street Lady" Pentax-A 28mm F2.8, "Bohemian Lady" Pentax-A 35mm F2.0, "Retro Lady" SMC Pentax-M 40mm F2.8, "Special Lady" Pentax-A 50mm F1.2, "Femme Fatale" Pentax-A 50mm F2.8 Macro, "Sweetheart" Pentax-A*85mm F1.4, "Lady Luck" Pentax-A*135mm F1.8, "Gorgeous Lady" Pentax-A*200mm F2.8 ED, "Duchess" Pentax-A*300mm F4.0, "HM The Queen" SMC Pentax 500mm F4.5


Link Posted 12/08/2008 - 22:31
I agree that Matin Evening's books are exceptional. I have them here for PS7, CS2 and CS3. All full of very valuable and authoritative material.

I think the histogram is a useful guide, but it's only a guide and to be honest I don't use it very often on the camera. I do use it routinely in Photoshop.
Best regards, John


Link Posted 13/08/2008 - 00:04
As the book says the Histogram is based on the in-camera processed .JPG. Must admit I don't agree with it not being useful however, I use the RGB one frequently & find have found it invaluable on several occasions

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