Why do so many people think higher megapixels are always better?

evil_kandy

The way I learned it, mega pixels aren't always good, especially in smaller cameras. Now the way I learned it could be way off, but I was told that especially in more compact cameras, they have smaller processors, and the more info they try to jam into it actually takes away from picture quality.

So if thats right, why do so many people think they need a camera with the highest possible mega pixels?

Answer
Because Manufactures, and electronics stores are pushing cameras with higher and higher megapixels.
Quote from one of my friends whom owns a Nikon Coolpix P6000

It has 13.5 megapixels, but how come when I put up the ISO past 400, I can't use the images? Aren't megapixels the most important thing to a digital camera? I wound up e-mailing the link to Ken Rockwells excellent article on megapixels v.s SENSOR SIZE: http://www.kenrockwell.com/tech/mpmyth.htm

About a week later, he purchased my d40+ kit lens, because of the amount of megapixels compared to the physical sensor size.

Bottom Line: Just like blu-ray, don't listen to Best Buy, or Sony, when it comes to megapixels.

What is the latest version for Canon Eos Rebel?

jORDANgIRL

I got one for Christmas back in high school. I took it everywhere with me for years. My sucky Nikon Coolpics digital broke last night and my Canon got stolen almost a year ago.
I am looking for newer film cameras.
Are there any that have the option of both film and digital in one camera?
It doesn't have to be the absolute latest version, but some of the newer model names would be appreciated.

Answer
i had heard Canon EOS Rebel T2i 18 MP CMOS APS-C Digital SLR Camera is new..

* 18.0-megapixel CMOS (APS-C) sensor;
* DIGIC 4 image processor for high image quality and speed
* ISO 100-6400 (expandable to 12800) for shooting from bright to dim light;
* enhanced 63-zone, Dual-layer metering system
* Improved EOS Movie mode with manual exposure control and expanded recording 1920 x 1080 (Full HD)
* Wide 3.0-inch Clear View LCD monitor;
* Dedicated Live View/Movie shooting button
* New compatibility with SDXC memory cards,
* Plus new menu status indicator for Eye-Fi support



http://www.amazon.com/Canon-T2i-Digital-3-0-Inch-18-55mm/dp/B0035FZJHQ/?tag=pntsa-20

http://www.bhphotovideo.com/c/product/675618-REG/Canon_4462B003_EOS_Rebel_T2i_Digital.html/BI/6846/KBID/7390

!!!!

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can i connect my computer with a cctv camera?

Answer
The simplest process is to buy a network IP camera. This is the camera you can connect to your PC network card using RJ45 plug or to your network switch or router.

You can buy any cheap model from AXIS(my first camera was AXIS, I like them very much), Arecont Vision, Panasonic, Sony, Trendnet (cheapest of the list).

Network IP cameras are modern. The only disadvantage - they are more expensive in compare with traditional analogue CCTV cameras.

If you purchased analogue CCTV camera, you can connect it to your PC using 2 ways:
- buy DVR card (old way, i would not go this way)
- buy an ip video server or video encoder l(like AXIS M7001, quite good for its price, see here: http://www.axis.com/products/cam_m7001/ or AXIS 240Q if you need to connect 4 cameras).

To choose a camera with proper lens (lens with different focal length have different angle of view), camera locations as well to choose your compression for HDD you have you can use IP Video System Design Tool from http://www.jvsg.com or special online calculators.

If you need high resolution camera (like 1-4 Megapixel) go for network camera. Also if you need to watch high speed objects, choose a camera with progressive scan.

If you build a network CCTV system you need to run some software on your PC. The list (a little bit outdated) of not too expensive software is on http://www.video-home-surveillance.com . Also you can have a look on forums networkcamerareviews.com or cctvforum.com to see what other people use.

Is it true that 2.3 megapixels are enough for a camera?

No

I herd that even tho you took a picture with a 24 megapixel camera, when you view it on computer you only see 2.3 megapixels? Is it true that 12 megapixel camera is much better choice than 24 megapixel camera?
before anyone else makes the mistake...one megapixel is one million pixels NOT 1000 pixels.....

Answer
no, term misconstrued,

2.3 mp is around 1792 x 1344 pixels. as 18.5 by 14 inches if placed at 96 dpi value
24 by 18 inches for the pixels range of ppi ,
monitors values cabn bet changed in Display properties,
and Monitors vary in actual size ,
along with Graphics card capabilities,

http://windows.microsoft.com/en-ca/windows/getting-best-display-monitor#getting-best-display-monitor=windows-vista
_____________

for 5by7" print quality at 300 dpi / ppi value guesstimate ,
you want 2100 by 1500 pixels which is around 3.2 mp,
but for same image to print at 300 dpi / ppi at 8 by10 inch , is 3000 by 2400 pixel,
that require 7.2 mp minimum,

so the larger you megapixel value is per image range , that being visual or sensor,
the better or clearer or higher print size for clarity is attained,
_____________

1000 across by 1000 down is the One million pixel count for 1 mp, 1000² (square)

MegaPixel calc
http://www.hugge.netg.se/java/MegaPixels.html
MegaPixels calculator
http://web.forret.com/tools/megapixel.asp?width=3000&height=2400
..

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