Showing posts with label 9 megapixel camera. Show all posts
Showing posts with label 9 megapixel camera. Show all posts

Thursday, December 12, 2013

What is a lens hood and lens adapter ring used for?

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Sandi


I just bought a Sony Cyber-shot 9.1-Megapixel Digital Camera, it comes with a lens hood and lens adapter ring that you're supposed to hook onto the lens. What is the purpose of these?


Answer
lens hood is to minimize glare from ambient light from what i understand... lens adapter ring? perhaps to attach extra lenses... i have a Canon Powershot S3 IS, and it has the ring thing too. I understand that it's to attach special lenses to give you extra zoom, special features, etc. You'd have to check the manufacturer's website to see about lenses that would work for it though. check out sonystyle.com and look in their cameras section. there may be extra lenses specific to that camera, unless you can take the Minolta A mount lenses like the Sony Alpha series of Digital SLR cameras. either way, check sony's website

:D

Why does my digital camera focus on the background instead of my subject most of the time?




Steve E


We get awesome sharp results of the background, but our subjects will be blurry! It seems no matter what setting we put the camera on it always does this. The camera is a Fuji Finepix with 9 megapixels. We can't get good action shots, either. Any ideas? Thanks.


Answer
This is a bit of a complicated question to answer but I'll try and give you a basic idea here. I'm also not sure which model camera you have so I can't be certain that all the details will be 100% accurate but you should still get the main concept.

When you take a photo with most cams, there's a two-stage process: half-pressing the shutter button first to lock focus on your subject, and full-pressing to capture the shot. If you don't half-press and allow the camera to determine focus (ie. you just full-press right off the mark), the camera will automatically hunt for the first thing it can focus on, and sometimes it'll get it right, sometimes it will fire prematurely. In this scenario, always half-press, wait for the camera to lock focus and give you a signal that it's ready to fire (usually the focusing rectangle lights up a green color), and then full-press.

The 2nd thing you want to keep in mind is that most compact cameras rely on contrast detection to achieve correct focus. If you're trying to focus on a part of a scene that has very low contrast, the harder it'll be for the camera to determine what exactly you're trying to focus on. This can sometimes be tricky so if the camera refuses to confirm focus (green rectangle), refocus a few times or focus on something more contrasty but that's at a similar distance away from you as the actual target.

There's more to this but try the two suggestions above to get you started. Good luck!




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Tuesday, August 6, 2013

What is the largest print size for 6.0 megapixel?

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 on Download Cover Photos At 399 Pixels Wide And 150 Pixels Tall | Frame ...
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e_coli_lov


I have a 6.0 megapixel camera, what it the largest size print i could get at 300dpi?
I have heard many times that larger prints don't have to be great quality - they can be somewhat pixelated - because the prints will be viewed from a larger distance away from the photo than say an 8x10. If that is so, how much could i blow up an image taken with my 6.0 megapixel camera?



Answer
Strictly speaking, what you're asking is a math problem.

Assuming the camera has a 4:3 aspect ratio, the following is true:

4X*3X = 6,000,000 (= 6MP)

Solving for X, you get X =~700.

So your 6MP picture is about 2800 pixels by 2100 pixels.

Divide that by 300 dpi (your preferred print setting), and the largest print you'd get is about 9" by 7" (= 2800/300 and 2100/300). So an 8"X10" would be close to this.

To print an 11" X 14" at 300 dpi, you'd need 3300*4200 (actually, it would wind up being around 3300*4400 because of the 4:3 aspect ratio) pixels, or about 14MP.

Try printing out your photos at 200 dpi first. If you don't like how that looks, then you should consult a professional about printing out 11" X 14" photos out for you from 6 MP files.

What about camcorders having 70x zoom if any, with both excellent still and motion megapixels?




Jin Mdi


I heard about a Panasonic camcorder having 70x zoom but 0.8/0.9 megapixels for still image with less resolution. What does this mean ? Is there any Sony or Canon product having both excellent zoom more than 50x(say) optical zoom with 12 or 14 megapixels - still imaging, with high resolution ?


Answer
To get high resolution still images and high zoom, you would need to use a D-SLR combo camera with whatever lens you desire (.mm). Combo D-SLR's record video in HD but have much larger sensors than typical consumer-grade camcorders/cameras. If the zoom factor is very important to you on a camcorder, make sure you consider Optical zoom not Digital zoom. Optical is true lens zoom and digital is basically magnifications of the pixels, thus fake and looks terrible when used. Most consumer-grade camcorders can take still images at around 5 or more mega-pixels which is fine and high zoom requires the use a tripod for sure as a tiny bit of movement (nervous hand, wind, etc.) of the cam and/or tripod will be acerbated in the final video (looking shaky and unappealing to the viewer).




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