 Darleen A. Stry |
RAW format conversion I have the Canon 300D reble with 6.3MP. I shoot alot of stuff in raw. However, I notice that when I have the image converted to a tiff file so I can use it it's back down to the same size it would have been had I shot originally as a large jpeg. I end up with an 8x12 at 300 dpi. I want a bigger picture with good resolution. Do I have to go out and get a bigger MP camera or am I converting the RAW wrong so I should be getting larger images to begin with? Looking for help.
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- Gregory LaGrange Contact Gregory LaGrange Gregory LaGrange's Gallery |
You're talking about image size, not file size. If you want a bigger image size right out of the camera, without interpolation, you must get a camera with more MPs. Resizing with interpolation, best results are done with converted RAWs.
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Michael H. Cothran |
TIFF and RAW should produce the same size file. The difference is that a TIFF can be somewhat corrected/enhanced in-camera, while a RAW needs to be fully corrected/enhanced in a post-editing software (such as PS). In addition, I believe your memory card will hold more RAW files than TIFF's while you are shooting. Your stated file size of 8x12 @ 300 ppi (not dpi), is actually a tad high. A 6.3 mp camera should produce a maximum file size of about 18 MB, which would yield a ppi of 256 for an 8x12. If you're getting 300 ppi, then my math is a little off, but you are still as good as it will get with your camera - RAW or TIFF. Shooting either will not yield you a larger file by itself. Is it worth going to a higher MP camera? Your call on that. You'd probably want to go with a 12 MP camera if you decided. FYI - a 12 MP camera will yield a 35 MB file, twice the size of a 6 MP camera, and will yield an approximate 10x15 @ 300 ppi. These files can be comfortably printed at 12x18 @ 240 ppi, and even 16x24 @ 180 ppi. With a little interpolation, you can increase the 16x24 to 240 ppi. Another 'FYI' - If you're doing your own printing on an Epson, your file sizes actually are better off if they're set to 360, 240, or 180 ppi rather than 300. I even find that 240 ppi generates better looking prints oftentimes than 360. And for large prints (16x24 & up), 180 ppi still delivers a quality print that you can be proud of. Hope this helps a little. Michael H. Cothran
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Darleen A. Stry |
Yes that help tremendously. For some reason I had it in my head that I would end up with a 6.3 MB file in jpeg with a 6.3 camera. You're right it isn't 8x12 it's as you calculated. Thanks again to both of you.
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