film sensor

Discussion in 'Photography Beginners' Forum' started by bigpicture, May 4, 2008.

  1. bigpicture

    bigpicture TPF Noob!

    Joined:
    May 4, 2008
    Messages:
    2
    Likes Received:
    0
    Location:
    central Conn.
    Can others edit my Photos:
    Photos NOT OK to edit
    Hi,

    I noticed that different dslr cameras have different size sensors, some larger, others smaller. Does a larger sensor provide better quality photos? If so, why?

    Thanks
    Bigpicture
     
  2. Mav

    Mav TPF Noob!

    Joined:
    Jan 1, 2008
    Messages:
    1,457
    Likes Received:
    2
    Can others edit my Photos:
    Photos OK to edit
    All other factors being equal, larger formats will give better results. Cropped DSLRs will give superior results to point and shoots. Full frame DSLRs will give superior results to cropped DSLRs. Medium format digital or film will give superior results to any 35mm class SLR system. And large format (4x5" film) will give superior results to medium format, etc.

    Because larger formats have more sensor or film area, they're not required to resolve as much detail per inch of sensor or film, and thus can give much sharper results.
     
  3. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

    Joined:
    Dec 16, 2003
    Messages:
    33,822
    Likes Received:
    1,811
    Location:
    Edmonton
    Can others edit my Photos:
    Photos NOT OK to edit
    That's right. As well, with digital sensors...one factor of quality is the amount of 'noise' in the image. Noise is a result of things like distortion in the signal and heat on the sensor.

    Smaller sensors will build up more heat and have more distortion...which means that smaller sensors will often result in images with more noise...especially at high ISO settings.

    That is why a typical digi-cam puts out noisy images at ISO 400 or 800. A modern DSLR will put out cleaner images at ISO 800 & 1600.
     
  4. Socrates

    Socrates TPF Noob!

    Joined:
    Jan 28, 2008
    Messages:
    1,183
    Likes Received:
    0
    Location:
    Exit #5
    Can others edit my Photos:
    Photos NOT OK to edit
    Bigger sensors mean bigger pixels (for the same total pixel count). Bigger pixels mean less electrical noise.
     
  5. bigpicture

    bigpicture TPF Noob!

    Joined:
    May 4, 2008
    Messages:
    2
    Likes Received:
    0
    Location:
    central Conn.
    Can others edit my Photos:
    Photos NOT OK to edit
    Hi,

    Thanks for your info on sensor size. Very helpful.

    bigpicture
     
  6. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

    Joined:
    Dec 16, 2003
    Messages:
    33,822
    Likes Received:
    1,811
    Location:
    Edmonton
    Can others edit my Photos:
    Photos NOT OK to edit
    On the sensor...I believe you would call them photosites rather than pixels. A lower density of photosites will usually result in lower noise levels.
     

Share This Page