What does the lens size affect in a SLR camera, and what's MP?

best camera lenses for beginners image

Camera lenses are sized in mm, but what is the significance of the size? Also, what is MP and what does that affect? Any other helpful info on SLR cameras would be nice! I am a beginner, so some recommendations for a good (not too expensive) SLR camera would be great too!

Answer
You really would enjoy using your camera if you took the time to learn the fundamentals of using a camera.

How the camera works

http://camerasim.com/slr-camera-explained/

http://camerasim.com/camera-simulator/

As far as MP (megapixels) the number of pixels found on a sensor, you need to know this.

http://www.kenrockwell.com/tech/mpmyth.htm

And this link will help you determine what the field of view is for any specific focal length lens. Lenses are measured in millimeters (mm)

http://imaging.nikon.com/lineup/lens/simulator/

What kind of camera gear do you have?

Rebecca

I'd like to know to know which camera bodies, lenses, flashes, and other accessories you own. I'm a beginner photographer and it would be interesting to see what other photographers have.
Thanks in advance!

Answer
SLR's.....

Digital

Canon 40D + BG-E2 battery grip

Film

Canon A-1
Fujica ST-605
2x Zenit EM
Cosina PM1
Sigma Mark 1

Other Film Cameras....

Olympus Trip 35
Olympus XA2
Ricoh 500GX
Ricoh FF3 AF Super
Cosmic 35
Yashica A
Voigtlander Vito C
Wirgin Edixa
Fujica Auto-M
Zeiss Ikon Nettar 515/2
Canon AF35 ML

Lenses.....

Canon 50mm f/1.8
Canon 35-135mm f/4-5.6
Canon 70-200mm f/4
Canon FD 50mm f/1.8
Canon FD 50mm f/1.4
Vivitar 200mm f/3.5 (FD mount)
Cosina 50mm f/2

M42 Mount

Pentacon 50mm f/1.8
Helios 44M 58mm f/2
Fujinon 55mm f/2.2
Sigma 39-80mm f/3.5

(I also own an M42 > EOS adapter to use the M42 lenses on my Canon 40D, very useful!).

Helios 3x Teleconverter (M42)
Vivitar 2x Teleconverter (FD)
Tripod
Lens hoods
Shoulder bag
Op/Tech Pro strap
Grey Card
Photoshop CS3
Lightroom
etc.......

Many of my cameras have a fixed lens so they are obviously not interchangeable, I prefer a fixed lens with a wide aperture on a rangefinder to a large SLR.

I have a whole shelf filled with flashes and cases and all sorts of bits that sometimes come with these cameras, I never use flash, I tend not to use tripod either unless it's absolutely necessary.

Of all these cameras, the one I use the most is the Olympus Trip 35.

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