Help me select a camera

[Midget]

he wants 10x magnification. that is, a 10:1 mag ratio.

the picture i shot (above, tip of the knife) was 1:1.

it means the size of the object itself is exactly placed on the film media (or ccd). he wants 10x magnification, so he wants it such that the object itself is 10 times the size of the media in which it's placed. does that make sense? im not good at this.

"zoom" is kind of a different story. zoom and magnification are related in a sense, but magnification has more to do with your camera's ability to focus on a close object.

i'm pretty sure that's right.

 

[UnknownVT]

If you just want profiles, you can put your knife on a flat bed scanner and get a better picture than you ever will with a camera...and scanners are cheap. I know, I've tried it both ways.

What he said......

Please take a look at this old thread -

some general flatbed Scanners advice

Most computer monitors display at 96ppi (or Macs at 72ppi)

So for 10x life-size reproduction on a screen you need a scanner that can scan at about 720 - 960 dpi - which is pretty common (1200dpi is the norm) and as mentioned cheap.

Here are some scans of edges -

at steadily increasing magnification (look at the constant grid of the background paper - about 3/8" or 5mm grids)

--
Vincent
http://clik.to/UnknownVT2006
http://clik.to/UnknownVT2005
http://clik.to/UnknownVT2004
http://clik.to/UnknownVincent

 

[singteck]

There's a few things to consider here.

When we talk about magnification with a camera, we are talking about the size of the image reproduced on the CCD (or film if you are using that) of the camera. So a 10x magnification of a 1mm square will be 10mm on the CCD. Depending on the resolution of your camera's CCD, when viewing the image on the computer screen, that 1mm square will be the size of your screen!!!! That's the reproduction magnification. If we take that into account..... magnification will be in the regions of hundreds if not thousand of times.

That largest square is 33mm (there about) and it was reproduced from a 5mm square. So the magnification is 33/5 which comes out to be 6.6x magnification. But that is a reproduction magnification. Scanners scan at 1:1 magnification but the reproduction magnification is more depending on the pixels.

10x zoom is a whole new kettle of fish.....