Hello all. As my name indicates, I am new to digital photography, so PLEASE take it easy on me.
I recently purchased a D5100 and am very happy with it. I took a 1/2 day workshop on how to make use of it's features, and I learned a ton, though I am still a novice.
Here is something I have run into. Even in "FINE" mode and "LARGE" setting, my files are only 3-7 megs max, with the average being around 4 MB per file. I was under the impression that a 16.2 MP camera should produce files much larger than that. Everyone I talk to says the same thing, if it's set to fine and large the files should be between 8 and 25 megs.
I am using a 32gig class 10 micro SD card (with adapter).
Can anyone help me? Is there any way at all this is the camera? I have even reset the camera to it's defaults, and reset the file type and photo size (fine and large) to no avail. I hope this is sufficient info for someone to help me.
There's nothing wrong. JPEG files inherently are compressed, and they compress a lot depending on what you have in the image. A smooth, evenly lit blank wall compresses a lot more than pictures of dense, leafy underbrush in speckled/dappled sunlight. If you set it to produce TIFF files (does it do that? Can't remember - some models do, some do not) you'll get a pretty enormous file out of it. TIFF is often not compressed at all.
_____ Brian... a bicoastal Nikonian and Team Member
My gallery is online. Comments and critique welcomed any time!
As noted already, Jpegs have data compression applied to the data. Also the the camera's measure is megapixel while the computer stores bytes. The number of pixels to bytes depends upon the color depth being recorded. The number of bits per pixel will determine how many bytes will be needed to store a pixel.
There is also some other data recored ed within the image known as EXIF or meta data, but this data takes up less than 1 Mega Byte.
And there is a preview thumbnail image embedded within the Jpeg and NEF image.
I only take my most important pictures in RAW (NEF) format and when I do I also take JPEGs. 99.99% of the time the JPEGs are better than the NEF because of in-camera processing (if you set up your camera properly).
And, I take thousands of pictures with little time left for post processing, so I usually only take large/fine JPEGs.
Besides, software has gotten so good that you can post process a JPEG and more easily too.