capabailities of auto focus

Discussion in 'Photography Equipment & Products' started by pocketshaver, Nov 22, 2019.

  1. pocketshaver

    pocketshaver TPF Noob!

    Joined:
    May 5, 2019
    Messages:
    214
    Likes Received:
    16
    Can others edit my Photos:
    Photos NOT OK to edit
    been looking at cameras and saw something funny about either a canon or Nikon camera..

    For the factory website information, it said that the cameras Auto Focus ONLY provided rough focusing, and the user needed to do the final focusing by hand.

    Does that seem logical to anyone, considering the ancient 25 year old elan 2e I just tossed in the garbage this morning, claimed to be able to keep auto focus on MOVING VEHICLES like jet skis.


     
  2. dxqcanada

    dxqcanada Been spending a lot of time on here!

    Joined:
    Dec 4, 2008
    Messages:
    7,132
    Likes Received:
    1,314
    Location:
    Woodbridge, Ontario, Canada
    Can others edit my Photos:
    Photos OK to edit
    You really need to provide links that we can read what you are referring to, so we can provide an informative reply.
     
    • Like Like x 1
  3. Derrel

    Derrel Mr. Rain Cloud

    Joined:
    Jul 23, 2009
    Messages:
    45,757
    Likes Received:
    17,496
    Location:
    USA
    Can others edit my Photos:
    Photos OK to edit
    I'm not sure exactly what they might have been talking about. Over the past 15 years or so I have found that autofocus is getting better and better and better, and very seldom do I need to make an adjustment manually in 99% of situations.
     
  4. Jeff15

    Jeff15 TPF junkie!

    Joined:
    Mar 29, 2018
    Messages:
    10,216
    Likes Received:
    5,172
    Location:
    Lichfield UK
    Can others edit my Photos:
    Photos NOT OK to edit
    Sony autofocus is spot on............
     
  5. pocketshaver

    pocketshaver TPF Noob!

    Joined:
    May 5, 2019
    Messages:
    214
    Likes Received:
    16
    Can others edit my Photos:
    Photos NOT OK to edit
    I was looking at Nikon, Canon,leica, and Fujifilm cameras.

    Anyone realize that Fujifilm has about 3 websites for EACH of their camera products? fricking mess, and nothing has a price. And most of their listed dealers DONT EVEN CARRY Fuji cameras on websites.
     
  6. pocketshaver

    pocketshaver TPF Noob!

    Joined:
    May 5, 2019
    Messages:
    214
    Likes Received:
    16
    Can others edit my Photos:
    Photos NOT OK to edit
    it was a mirrorless or dslr, either way it had nice removable lenses. Its schtick in the ad was that the computer would give you a rough auto focus, but the user would have to use the manual controls on the lens to dial the focus in nice and tight.
     
  7. ac12

    ac12 Been spending a lot of time on here!

    Joined:
    Dec 5, 2017
    Messages:
    1,914
    Likes Received:
    624
    Location:
    SF Bay Area, California, USA
    Can others edit my Photos:
    Photos NOT OK to edit
    SPECIFIC details and links.
    Because what you have said does not correlate to my experience.
     
    • Agree Agree x 3
    • Like Like x 1
  8. AlanKlein

    AlanKlein No longer a newbie, moving up!

    Joined:
    Nov 24, 2011
    Messages:
    1,374
    Likes Received:
    456
    Location:
    NJ formerly NYC
    Maybe they were referring to a setting that auto focuses but then allows manual adjustment afterwards if you want. The setting then releases the servo motor so you can move the lens focus ring by hand. My Sony does that and then also zooms in so you can see the focal points easier. But you don;t have to do anything. It's just there as only one of many focus setting including all manual, or all auto.
     
  9. Dacaur

    Dacaur TPF Noob!

    Joined:
    Jul 3, 2019
    Messages:
    89
    Likes Received:
    21
    Can others edit my Photos:
    Photos OK to edit
    I would guess the op has been reading a crap-ton of stuff from different sites and has just gotten something mixed up in their mind.
    99% of the time handheld auto focus is just as good as a carefully fine tuned manual focus on a tripod. (Discounting obvious missed focus of course) That is to say, you won't get a "better" picture by putting you camera on a tripod and carefully focusing using the focus ring and 10x magnification in live view, only one that is just as good as the af picture, but took WAY longer to take (again, assuming the shutter on the handheld shot us fast enough to take camera shake out of the equation).

    On the other hand, if you think that using manual focus through the viewfinder handheld is better or even "just as good" as auto focus, you are wrong. You will get WAY more shots with missed focus trying to use manual focus through the viewfinder than you will using autofocus.

    And lastly of course, there is the 1% of the time when chances are good you will get a better shot using manual focus, things like macro photography, shooting through glass or chain link, or low light photos, but those are definitely the exception, not the rule....
     
    Last edited: Nov 26, 2019
    • Agree Agree x 1
  10. Soocom1

    Soocom1 Been spending a lot of time on here!

    Joined:
    Feb 27, 2006
    Messages:
    2,058
    Likes Received:
    670
    Location:
    Southwest US
    Can others edit my Photos:
    Photos NOT OK to edit
    There is some misconception on the issue of autofocus.

    Most will readily agree that autofocus is extremely accurate for most pictures. With the occasional misfocus or some oddity that comes into play.
    But having used the 70D with the live view and digital focus, I have seen a very specific and sometimes dramatic fuzziness over standard autofocus.
    Remember that the autofocus works on a system of computerized image splitting that is done in camera over the old split dot on older cameras.

    The autofocus system works off of generalities and unless your shooting for extreme detail from a distance, the AF system works just fine.
    However: If your into technical or macro photography, where the sharpness really DOES count, it shouldn't be too much of an issue.
     
    • Agree Agree x 1
  11. Derrel

    Derrel Mr. Rain Cloud

    Joined:
    Jul 23, 2009
    Messages:
    45,757
    Likes Received:
    17,496
    Location:
    USA
    Can others edit my Photos:
    Photos OK to edit
    Not sure what you are on about. I think if you are going to make claims then you should be able to copy and paste a URL.
     
    • Agree Agree x 2
  12. JBPhotog

    JBPhotog No longer a newbie, moving up!

    Joined:
    Mar 26, 2018
    Messages:
    371
    Likes Received:
    175
    Location:
    Canada
    Can others edit my Photos:
    Photos NOT OK to edit


    What you may be referring to is the process of calibrating the focus of a particular lens to a specific body. Slight front or back focus can happen with a large number of brands however, for the past number of years one can actually calibrate each lens so AF is precisely focused. This calibration can then be saved in the camera body so when you swap lenses the camera automatically adjusts the focus point for precise focus.
     
    • Agree Agree x 1

Share This Page