A colleague of mine changed the resoloution settings to about 72 dpi, as he was just shooting some images for the web.
But now I need to get it back and there is no manual in sight. How do I reset it to a good 300dpi at the least?? please help!
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Your camera cannont shoot at either 72 dpi or 300 dpi. It shoots at whatever resolution you have it set for. Dpi (dots per inch) is a print specification, denoting how large (or small) your pictures are printed.
The DSC-W100's highest resolution is 3264x2448. Printed at 72 dpi, it can generate a print bigger than 40x30 inches, albeit a bit grainy. Printed at 300 dpi, you can generate 10x8 inch prints.
Again, dpi is a measure of how you print pictures. It has no bearing on how you capture images with your camera.
The DPI are not a user allowed settings. Normally DPIs are factory defined. You can change the DPI using software. Normally the image administration software and advanced softwares can allow you to change it.
Remember an important issue: DPIs are a printing matter not an image quality matter. Yo can set an image to 300 DPI and the same to 72 DPI and you will see no difference between both images.
A good camera and your skills will allow you to take high quality images.
A couple of things - I don't think you mean 500 megapixels (that is a lot!) but I assume you mean you expected a high resolution image. You may have it! The dpi setting is largely irrelevant (for photographers) as it simply relates number of pixels to a (notional) print size. Thus an image that is 3000 pixels wide (say) would print out to 10 inches at 300 dpi (3000/300) or 40 inches (approx) at 72 dpi (3000/72). the image has the same information /resolution - it's just "spread" further on the larger print. You can easily change the nominal dpi in e.g. Photshop Elements but it won't affect your image quality. If however you are getting low resolution images when setting the camera differently that's something different. I would need extra info to help there but pssibly check if the camera was set to RAW and maybe you were looking at the (small) JPEG usually saved with it?
Sony H1 takes photos at 72 dpi by default. But the picture quality will be good. if you want to convert it to 300dpi open the picture in adobe Photoshop and select image size and change resolution to 300 dpi. but the file size will be very high to up load. if you want to reduce the file size select the image size in adobe photoshop and reduce it according to your requirement. if my solution proves good please rate it. Regards.
Unfortunately most of the Olympus cameras shoot at 72 dpi by default - a suggestion is to shoot at the highest quality setting and then use Adobe Photoshop to modify to 200 dpi if that's what you need.