Professional Web Applications Themes

newbie question on ASA speed settings - Photography

On a Canon D30, for instance, I'm trying to understand what the ASA speed settings really do. Is there anything optically/electronically different about the way the data is recorded, or is this simply a parameter for influencing the various automation modes? thanks bill...

  1. #1

    Default newbie question on ASA speed settings

    On a Canon D30, for instance, I'm trying to understand what the ASA speed
    settings
    really do. Is there anything optically/electronically different about the
    way the data is
    recorded, or is this simply a parameter for influencing the various
    automation modes?

    thanks
    bill

    bill Guest

  2. #2

    Default Re: newbie question on ASA speed settings


    "bill a" <invalid> wrote in message
    news:%esNd.26504$news.prodigy.com... 

    it's an amplifier to boost the signal, higher ISO (ASA) the more the gain,
    and also the noise.


    dylan Guest

  3. #3

    Default Re: newbie question on ASA speed settings

    so the noise is the (no free lunch) tradeoff like grain size for film.
    that explains it.
    thanks,
    bill


    "dylan" <com> wrote in message
    news:cu5krc$388$svr.pol.co.uk... 
    >
    > it's an amplifier to boost the signal, higher ISO (ASA) the more the gain,
    > and also the noise.
    >[/ref]

    bill Guest

  4. #4

    Default Re: newbie question on ASA speed settings

    > so the noise is the (no free lunch) tradeoff like grain size for film. 

    Exactly. It's like using a film with faster speed. More grain.


    Steven Guest

  5. #5

    Default Re: newbie question on ASA speed settings

    bill a wrote: 


    There's no free lunch, but it's not as bad a film grain though.

    Film grain looks noisier (z) and is larger (x,y) as the ISO goes up.

    Digital noise does not get larger in x,y as it is constrained to its
    fixed pixel size. The noise in digital is in amplitude (z) only.

    Hence digital usually looks cleaner than film as ISO goes up.

    Cheers,
    Alan

    --
    -- r.p.e.35mm user resource: http://www.aliasimages.com/rpe35mmur.htm
    -- r.p.d.slr-systems: http://www.aliasimages.com/rpdslrsysur.htm
    -- [SI] gallery & rulz: http://www.pbase.com/shootin
    -- e-meil: there's no such thing as a FreeLunch.
    Alan Guest

Similar Threads

  1. newbie questions on speed
    By cartuchos in forum Macromedia Flash Flashcom
    Replies: 0
    Last Post: August 7th, 05:52 PM
  2. Is animation speed subject to computer settings?
    By prototype, human 463 in forum Macromedia Flash Sitedesign
    Replies: 3
    Last Post: January 18th, 05:49 AM
  3. Replies: 13
    Last Post: December 11th, 09:13 PM
  4. PLAY SPEED OF SCORE FROM NEWBIE
    By twobugs webforumsuser@macromedia.com in forum Macromedia Director Basics
    Replies: 2
    Last Post: November 12th, 10:10 PM
  5. best settings (speed) for PS 6 (on PC)
    By Bernhard Ess in forum Adobe Photoshop 7, CS, CS2 & CS3
    Replies: 0
    Last Post: August 17th, 10:35 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139