 Laura J. Smith |
JPEG Vs. TIFF Why does my Sony F717 automatically take a pic in JPEG when I choose to shoot in TIFF? Who uses the JPEG and how in this case? Also, if TIFF provides highest quality for storing image, why do higher quality cameras like the Nikon D70 provide only JPEG and RAW as choices? I'm working on learning this stuff, haven't found a clear answer in my books yet, THANK YOU MUCH for helping!! PS And I've gathered that one immediately stores a downloaded JPEG in TIFF and then does innumerable corrections and then submits for a print, yes?
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Dave Cross |
Hi Laura. I'll go for the simple answers. If you need more information please ask here. File Formats 101. TIFF: A "non-lossy" format with various compression options (including "none" that can lead to HUGE files). The compressed TIFF files do NOT lose any detail. RAW: Various flavours here from the different camera manufacturers. Put simply this is the raw data from the camera sensor with none of the in-camera processing applied (colour correction, sharpening etc.). This is great because it means you can apply the processing after the fact (when you get home). To answer your questions: 1. Your F717 gives you a fast displaying and (fairly) small JPEG as well as the TIFF for your convenience (I expect the camera also uses it on the preview screen). Use the JPEG to quickly screen your pictures to filter out the 'failures'. 2. The high-end cameras give you a low compression JPEG (small) and RAW (raw data) - TIFF is an in-between format. If you want TIFF, make it from the RAW. 3. As far as your workflow is concerned, you are correct in NOT re-saving repeatedly in JPEG format. TIFF is just fine although you may get more mileage (and slightly smaller files) using the native PhotoShop .PSD format. Personally, I shoot in low-compression JPEG (EOS D-60) under normal conditions and switch to RAW when the lighting is bad (indoors, night etc). Using RAW allows me to do better correction of what could be marginal images. Do whatever feels best for you :-) Enjoy the world of digital. Cheers.
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Laura J. Smith |
Dave, thank you so much. That is a major help. Now just tell me, if you shoot in a low compression JPEG, does that mean you convert your stuff to TIFF before you submit it for whatever, or do you keep it in JPEG forever?
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Dave Cross |
No problem, Laura :- If I am not performing any adjustments to my shots (rare), I just leave it as the original JPEG. Some print shops insist on TIFF "because the quality is better". I just open my JPEG and save it out as TIFF - no one has ever complained about the quality (what they don't know won't hurt them:-). Any adjustments at all I load the JPEG into PhotoShop, do the tweaking and save as .PSD (PS native format, preserves layers etc.). Then, if I am going to print I save out as a compressed TIFF. You should avoid making multiple saves in JPEG format because every save recompresses the data (and throws away a little bit more of your detail information). In reality, I OUGHT to use RAW at all times, but lack of CF space in the camera and the additional processing time required really don't warrant it, low-compression JPEG works fine for me. Cheers.
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Nicky Trainor |
I'm really computer illiterate so please excuse me, but do you know how to make TIFF images smaller? - I'm not able to upload them onto BP, only as JPEG which hasn't looked great. Thanks for any input. - Nicky
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