When does an IS lens work?

Discussion in 'Beyond the Basics' started by prodigy2k7, Jul 7, 2008.

  1. prodigy2k7

    prodigy2k7 No longer a newbie, moving up!

    Joined:
    Apr 22, 2008
    Messages:
    1,665
    Likes Received:
    22
    Location:
    California, USA
    Can others edit my Photos:
    Photos OK to edit
    I mean more specifically, I dont know cuz I currently dont have a IS lens, when you turn the switch for IS on, is it on? or is it only on during the picture taking process?

    I assume if the switch is ON all the time it would drain the battery. Im guessing it only uses IS when you take the photo? I am just guessing of course.

    Any comments please?
     
  2. iflynething

    iflynething TPF Noob!

    Joined:
    Oct 26, 2006
    Messages:
    1,347
    Likes Received:
    0
    Location:
    South Carolina USA
    Can others edit my Photos:
    Photos OK to edit
    Canon's IS and Nikons VR equivalent are great in low light. If you are outside in some sun and have a fast shutter speed, turn it off. You don't need it.

    You don't need it because the shutter speed is fast enough to stop motion fast enough. Now, on the other hand, when you are say indoors, you would turn it on and since the camera can't gather enough light to have a fast shutter speed, so you can have a sharper image when the IS is turned on.

    Please, keep in mind though, IS or VR will NOT stop motiong anymore. It ONLY compensates for your hand shaking and movement.

    ~Michael~
     
  3. RyanLilly

    RyanLilly No longer a newbie, moving up!

    Joined:
    Aug 27, 2007
    Messages:
    1,478
    Likes Received:
    8
    Location:
    St. Louis, Missouri, USofA
    Can others edit my Photos:
    Photos NOT OK to edit
    Ok, I think the answer is, either when the lens senses movement or when you press the shutter halfway. I don't know, just an educated guess. I'm leaning towards then you press the shutter half way.
     
  4. prodigy2k7

    prodigy2k7 No longer a newbie, moving up!

    Joined:
    Apr 22, 2008
    Messages:
    1,665
    Likes Received:
    22
    Location:
    California, USA
    Can others edit my Photos:
    Photos OK to edit
    Thats not what im asking. WHEN does the IS actually work? Not when to use it.
     
  5. prodigy2k7

    prodigy2k7 No longer a newbie, moving up!

    Joined:
    Apr 22, 2008
    Messages:
    1,665
    Likes Received:
    22
    Location:
    California, USA
    Can others edit my Photos:
    Photos OK to edit
    Thats what im thinking
     
  6. pm63

    pm63 TPF Noob!

    Joined:
    Apr 23, 2007
    Messages:
    587
    Likes Received:
    0
    Location:
    London
    Can others edit my Photos:
    Photos OK to edit
    Well that was certainly informative.

    I can't speak for Canon but imagine it would be the same as Nikon: the VR system activates when the shutter release button is pressed half way. You can hear a tiny high-pitched squeak and you see the image stabilising through the viewfinder.
     
  7. prodigy2k7

    prodigy2k7 No longer a newbie, moving up!

    Joined:
    Apr 22, 2008
    Messages:
    1,665
    Likes Received:
    22
    Location:
    California, USA
    Can others edit my Photos:
    Photos OK to edit
    awesome thanks, its probably using the same connection/circuit as the manual focus since that is used when u press half way down, of course IS still works with MF is on hehe...

    Just a guess but thanks!
     
  8. Village Idiot

    Village Idiot No longer a newbie, moving up!

    Joined:
    Mar 20, 2008
    Messages:
    7,274
    Likes Received:
    406
    Location:
    Shepherdsturd, WV / Almost, MD
    Can others edit my Photos:
    Photos NOT OK to edit
    It's actually when you focus. Some of use don't have AF set to the shutter button.
     
  9. iflynething

    iflynething TPF Noob!

    Joined:
    Oct 26, 2006
    Messages:
    1,347
    Likes Received:
    0
    Location:
    South Carolina USA
    Can others edit my Photos:
    Photos OK to edit

    Ha ha. Sorry about that. I got a little bit carried away.

    Now you have to make it hard. Like pm63 said, it probably starts when you press halfway down to focus.

    ~Michael~
     
  10. Village Idiot

    Village Idiot No longer a newbie, moving up!

    Joined:
    Mar 20, 2008
    Messages:
    7,274
    Likes Received:
    406
    Location:
    Shepherdsturd, WV / Almost, MD
    Can others edit my Photos:
    Photos NOT OK to edit
    Read the above quote. It activates when you start focusing, or press down the focus button, which is not always half way on the shutter.
     
  11. Do'Urden's Eyes

    Do'Urden's Eyes TPF Noob!

    Joined:
    Apr 16, 2008
    Messages:
    881
    Likes Received:
    0
    Location:
    Mississauga, ON
    Can others edit my Photos:
    Photos NOT OK to edit
    if you ever use an IS lens you can tell it kicks in when you press the shutter button half way. looking through the view finder you can definately sense that theres a little less movement. it always gives me the feeling of being sort of drunk, and things are moving reallly sloowly.
     
  12. Bifurcator

    Bifurcator TPF Noob!

    Joined:
    Jun 1, 2008
    Messages:
    3,312
    Likes Received:
    1
    Location:
    Japan
    Can others edit my Photos:
    Photos OK to edit
    I guess this thread is primarily about the Canon camera the OP owns but someone also mentioned Nikon so I demand equal time. :D

    The (vastly superior IMO) system that Minolta designed and now found in some Sony models, allows the user to select when the AS (anti-shake) or "IS", "VR" is engaged. The options are Grip Sensor/Shutter-button/Full-time and Exposure Only/EVF (and of course off all together). The Minolta system is not lens dependent so it works with ALL lenses.

    Here it is in action: http://a.img-dpreview.com/reviews/konicaminoltaa2/Images/asmovie.mov
     
    Last edited: Jul 12, 2008

Share This Page