Susie Posted February 18, 2013 Share #1 Posted February 18, 2013 Advertisement (gone after registration) Hi Everyone. Without getting too technical, can anyone explain the following. I have a Digilux 1 which I bought new, just before the Digilux 2 came out. With it I can save files either as a jpeg or Tiff file. During the recent cold spell I took some photos of frost formations on leaves etc in my garden, and saved them as Tiffs, about 10mb each. Here is one of the pictures, but compressed so I can upload it here: Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! On viewing them on my laptop screen, at about 400 times magnigfication using Office Picture Manager, I cannot see any difference between the Tiff and a jpeg of the same picture at 800kb. If the quality is about the same, what is the point in saving them as Tiff's when it uses so much more memory on the chip? As you can probably tell, I know very little about digital photography, and even less about computers! Susie Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! On viewing them on my laptop screen, at about 400 times magnigfication using Office Picture Manager, I cannot see any difference between the Tiff and a jpeg of the same picture at 800kb. If the quality is about the same, what is the point in saving them as Tiff's when it uses so much more memory on the chip? As you can probably tell, I know very little about digital photography, and even less about computers! Susie ' data-webShareUrl='https://www.l-camera-forum.com/topic/198590-picture-quality/?do=findComment&comment=2246665'>More sharing options...
Advertisement Posted February 18, 2013 Posted February 18, 2013 Hi Susie, Take a look here Picture Quality. I'm sure you'll find what you were looking for!
Lindolfi Posted February 18, 2013 Share #2 Posted February 18, 2013 Excellent question! It shows the remarkable invention of image compression. The most important difference is that in a TIFF file (from RAW) there is more information which allows you to adjust contrast etc. without compression artifacts (like in the jpeg version) becoming visible. So if your last step is conversion to jpeg, you have done it in an optimal way. (nice experiment: try to increase contrast heavily on a jpeg file and do the same on a tiff file with the same image and see what happens) Another possible scenario in which jpeg is useful is to let it come out of the camera without any need to adjust. However, that usually is not doing justice to your photograph, since the images may turn out to be flat and uninspiring. So when you really are interested in photography it is hard to ignore the advantage of RAW files. Link to post Share on other sites More sharing options...
Lindolfi Posted February 18, 2013 Share #3 Posted February 18, 2013 Just to show it, I have taken an image from RAW and made a jpeg version. After that I applied increase in contrast to both versions and mounted them together. For clarity I have magnified the size of the detail by a factor of 3. You can easily see the jpeg artifacts as blocks of 8x8 pixels on the upper lip and straight edges that should not be there. Link to post Share on other sites More sharing options...
Susie Posted February 20, 2013 Author Share #4 Posted February 20, 2013 Hi Bert, Thanks for the reply. I was mistaken in thinking that the image would look less pixelated if it was a TIFF, but of course if both are stored as the same number of pixels (2240x1680) they will look the same! Maybe I should stick to film, but then the question of what scanner comes up! Susie Link to post Share on other sites More sharing options...
jaapv Posted February 20, 2013 Share #5 Posted February 20, 2013 And after scanning you run into your digital workflow again... Link to post Share on other sites More sharing options...
earleygallery Posted February 20, 2013 Share #6 Posted February 20, 2013 When I bought a D1 (well the Panasonic badged version) I wondered the same. I took a photo of a flower as Tiff and jpeg and printed the results. I could see more detail and better colour graduation in the Tiff image. Then there are the PP issues mentioned above. That said I mostly shot jpegs with it and kept PP to a minimum. Link to post Share on other sites More sharing options...
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