December 3rd, 2011
so i just found out the megapixels just mean how big you can make a clear picture. what i want to know is, what do i look for to determine the quality of a camera’s picture? like what spec. should i look for to compare/know the camera’s picture quality? you know the pictures that are crisp clear and of better quality than others. so what word/number determines that? i know there are other features like image stabilization and motion detection, etc. that help quality.
and if you know about these can you tell me what they affect when adjusted;
ISO speed
Shutter speed
aperture value
lens (bigger-smaller)
focal length
exposure compensation
and can you tell the quality of a camera’s image based on the quality of the camera’s video. like if the camera has 720p vids or 1080p vids will the picture quality be somewhat close to that sort of quality scale?
where do i see the resolution specs? i mean i don’t usually see the resolution specs listed anywhere when i look up cameras. sorry i don’t know anything about cameras. by the way i am in the category of using intermediate to advanced digital camera types (point and shoot type). not into the dSLR/SLR camera types. more of around $400 price range cameras.
anyone have a link i can learn how cameras work
oh i just seen that resolution is megapixels. i only print 4×6s so high megapixels is not needed for me. i am only looking for point and shoot cameras (ones that don’t change lens). sorry for the confusion.
thank you so much Jens for the help. best help received yet from yahoo answers.
one thing. i am just an average point and shoot camera guy. i have a few 12mp cameras, a olympus, sony and nikon. i was wondering why my pictures still come out not so good. what you said about too little light on high mp cams made a llot of sense i didn’t know. i only print 4×6s so what mp camera is more appropriate? you have any more recommendations on great point and shoot cameras under $250?
keerok i am only looking into point and shoot cameras that take great quality pictures under $250. i am not a photographer, just an average user. so i am not expecting high professional photos, just the best i can get in my range. is that so hard to ask for? i understand that the camera is just a tool. maybe you could kindly offer some knowledge/link so i can learn how to properly use a camera. but like you said no camera is made the same. thanks for the suggestions and answer btw
the camera is a tool, i know. so any Helpful information like a guide/tutorial that shows one how to use a camera properly?
will a 1/1.7" image sensor at ISO 12,800 produce a noisy pic?
what about a 1/2.3" image sensor at ISO 3,200?
just say they both are at f/2.6 with whatever speed. picture examples would be nice.
thank you all again. and thank you Jens for checking back. appreciate the help very much. thank you.
Megapixels merely determine the image size. A full HD tv or computer screen can only display 2MP (yes, two MP), anything more is wasted on it. 6MP are sufficient for poster sized prints, and 10MP are good enough for nearly anything.
More MP than that can actually be detrimental to image quality, especially in point and shoot cameras. The reason is that the more MP a sensor has, the smaller the individual pixels on it are. The smaller the pixels are, the less light each of them catches. The less light a pixel catches, the less accurate will its measurement of that light be. That’s bad for image quality. This is why cameras with lots of MP usually perform especially bad in low light situations, where each pixel has to work with particularly little light.
The current best camera for professional sports photographers, the $5300 Nikon D3s, has 12MP by the way. If they can do with 12MP, what does Joe Average need more for?
In case of vide 720p and 1080p only determines the resolution. If the video actually will be that sharp or blurry is an entirely different question. The resolution of the photo or video merely catches wthe image that is projected onto the sensor by the lens. A bad lens will project a bad, blurry image, and then increasing the resolution of the sensor won’t help at improving that anymore at all. All you will get is a bigger blurry image then instead of a smaller one.
There aren’t really any numbers that directly tell you how good a lens will be, but some can give you a good idea about it.
First off, bigger zoom ranges usually are detrimental to image quality. That’s because good quality lenses with big zoom ranges are more difficult to make. So at equal price, the lens with the smaller zoom range most often offers superior image quality. On DSLRs, many people use prime lenses, which don’t even zoom at all, for uncompromising image quality.
The second indicator is the aperture size. That’s the f-number behind the focal length number of a lens. E.g. 18-55mm f/3.5-5.6
Here small numbers indicate good quality. f/3.5-5.6 is a rather poor value. High quality DSLR zooms have f/2.8, prime lenses can even get f/1.8 or f/1.4
Among point and shoot cameras the values can differ. The high quality Canon S95 has f/2-4.9, which is a very good value for a point and shoot.
Basically these numbers say how wide the aperture can open (lower number means wider opening), and that determines how much light the camera can let in. This is crucial especially for low light performance, and also has a big effect on the ability to blur the background. Just google "aperture tutorial" for detailed information.
Edit:
Follow AWBoater’s recommendation, $280 for a P7000 is an awesome deal:
http://www.amazon.com/Nikon-Coolpix-P7000-Digital-Zoom-Nikkor/dp/B00427ZLRO
Myself, i use a S95 when i don’t bring my DSLR:
http://www.amazon.com/Canon-PowerShot-S95-Stabilized-3-0-Inch/dp/B003ZSHNGS/ref=sr_1_2?s=electronics&ie=UTF8&qid=1322578527&sr=1-2
It has a slightly better lens than the P7000 (f/2-4.9 vs f/2.8-5.6), but a smaller zoom range (3.8x vs 7x). I don’t mind the zoom range, but you might find it to be limiting. The main reason why i chose the S95 over a P7000 or Canon G12 (its direct competitor) is that i was looking for a really, really compact camera, as opposed to by big DSLR. A "big compact" such as the P7000 hence wasn’t what i was looking for, but other than that those are fine cameras.
Here is a sample shot that i took with my S95. Admittedly i post-processed it in Lightroom, but the P7000 should be capable of similar shots
http://www.flickr.com/photos/jens_wurm/5627655965/in/photostream
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