f-stop question...

Discussion in 'Beyond the Basics' started by railman44, Oct 25, 2004.

  1. railman44

    railman44 TPF Noob!

    Joined:
    Aug 23, 2004
    Messages:
    580
    Likes Received:
    1
    Location:
    Lincoln, NE
    Can someone please clarify an f-stop question I have? When I read a certain filter needs (let’s say) down or up 1 f-stop what does that mean? Down or up from what? Down or up from where your meter tells you when you have a correct setting without the filter? I’m assuming this is what it means?? Thanks for your help!
     
  2. Digital Matt

    Digital Matt alter ego: Analog Matt

    Joined:
    Jan 30, 2004
    Messages:
    5,346
    Likes Received:
    65
    Location:
    Santa Barbara, CA
    Can others edit my Photos:
    Photos NOT OK to edit
    It means that the filter lets 1 stop less light through. You need to open your aperture by 1 stop, or lower your shutter speed by 1 stop to compensate for the loss of light.

    If your camera has ttl metering, it will meter correctly with the filter on. If you were using a handheld meter, you would have to make the change yourself.
     
  3. ksmattfish

    ksmattfish Now 100% DC - not as cool as I once was, but still

    Joined:
    Aug 25, 2003
    Messages:
    7,021
    Likes Received:
    34
    Location:
    Lawrence, KS
    Can others edit my Photos:
    Photos NOT OK to edit
    Read up on stops and f/stops in the stickie post at the top of this forum "Vocabulary for newbies".
     

Share This Page