I have many question

Discussion in 'Photography Beginners' Forum' started by Marrish, Aug 10, 2019.

  1. Marrish

    Marrish TPF Noob!

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    I have been trying to master Back Button Focusing, quite honestly my camera has been in it for 3 or so years. All of which I have been unsure as to how and why it is supposed to give you the sharpest possible pictures. (I have yet to find that to be true-sigh)
    I also recently enrolled in a course through Better Photography for my Nikon D7000 camera. In the notes the instructor made mention that Matrix metering is not ideal for BBF. I asked him about it and this is what he wrote me back:

    "Hi Stacy,

    Matrix metering takes a number of factors into account when calculating the exposure, including the scene brightness, the scene's contrast level, colours and information from the autofocusing system; therefore if you meter using Matrix from one scene and then lock the exposure using the AE-L feature before re-composing to shoot an alternative scene you may well find that the exposure for the second scene is not accurate. The AE-L feature works most reliably with either Spot, or Center-weighted metering,as these do not integrate information from the autofocusing system, and they are not colour sensitive."

    Do you all agree with this and find it to be true? I also still struggle what "re-compose" the shot means. Can someone hear explain? Thanks!

    Help me Learn! :1219:In my Bag: Nikon D7000, , Sigma 17-70mm, Sigma 17-200mm f2.8, Nikon 50mm 1.4G, Nikon 80mm 1.8, Nikon 40mm macro. Nikon 85mm, Lightroom and PSE14
    "How people treat you is their Karma; how you react is yours."


     
  2. Designer

    Designer Been spending a lot of time on here!

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    Hi, and welcome!

    Back-button focusing adds a layer of unnecessary complexity to taking a shot. Just use regular focusing. Your camera is a smart thing, use it.

    Metering can be spot, center-weighted, or matrix, depending on the scene. Whichever mode you need, you can meter a spot then lock exposure using the AE-L feature, or not, depending on your intent.

    If your metering area or focusing area is not quite in the right place, you can do the metering or focusing and then press the shutter button half way, which will hold the focus, and then simply move the camera to frame what you really wanted in the frame before pressing the shutter button the rest of the way. This will take some practice so your finger can hold the half-press position without letting up while you are reframing the shot.

    So metering and focusing can be performed prior to releasing the shutter, by using AE-L or AF-L or both as you need.
     
    Last edited: Aug 13, 2019
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  3. Original katomi

    Original katomi No longer a newbie, moving up!

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    Hi welcome, just going to add if you get chance practice sit with the camera whilst watching the tv get used to the feel of where things are, do some night shoots, even the garden if a topic comes up practice that you want to build up what is called muscle memory in your hands, s o as soon as you pick up your camera you KNOW where everything is and what it does. Wish you well with the course.
     
  4. Derrel

    Derrel Mr. Rain Cloud

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    I think that back button focusing on cameras like the D7000 is overrated. If you are having problems with it I would suggest using back button focus locking, but keep the focusing action itself tied to the shutter release button and a half press of the release button.


    There are a number of reasons the back button focusing is not often ideal. Unfortunately, the Web and YouTube are full of articles that talk it up. My experience in over 20 years of Nikon autofocus digital single lens reflex shooting is that BBF is overrated.
     
    Last edited: Aug 12, 2019
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  5. Derrel

    Derrel Mr. Rain Cloud

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    A very useful e-book that I would recommend to you is one of a series-:The Complete Guide to the Nikon D7000",one of many written by Thom Hogan. It explains in great detail everything there is to know about your camera. Well Worth the money!
     
    Last edited: Aug 12, 2019
  6. Jeff15

    Jeff15 TPF junkie!

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    Hello and welcome.............
     
  7. ac12

    ac12 Been spending a lot of time on here!

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    I agree, get back to REGULAR focusing with the shutter release.
    Leave Back Button Focusing to when you understand it and have a NEED for it.
    It may work for some, but NOT for all.

    If you are just trying to understand and learn what it is, then OK.
     
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  8. 480sparky

    480sparky Chief Free Electron Relocator Supporting Member

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    I must be doing it wrong then. I use BBF for static subjects, and release focus for sports, wildlife etc.
     
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  9. Scott Whaley

    Scott Whaley No longer a newbie, moving up!

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    I use BBF on both my Canon 7d & 5d. I like to use the AI Servo focus. That helps a lot. I don't know if the Nikon cameras have the AI Servo feature or not.
     
  10. ac12

    ac12 Been spending a lot of time on here!

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    Yes, just under a different name. It is Continuous-servo AF (AF-C).
    upload_2019-8-12_22-5-36.png
    Just like IS and VR. Different names for the same thing.
     
  11. DGMPhotography

    DGMPhotography Been spending a lot of time on here!

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    What have you found about back button focus to be overrated?

    I was under the impression that it's pretty much always better, and not wanting to use it was just a matter of preference.
     
  12. Derrel

    Derrel Mr. Rain Cloud

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    It is always better? No it is not always better. Very very few things are always better in photography. For example the above user has been struggling with it for three years. Should we assume therefore that it is something that he is always better off using? The problem is the OP is using a method which is designed as an ancillary method,situations in which acquiring a brand new focus with every purchase of the shutter is not done. This is counterintuitive to almost 3 decades worth of shooting for some. Back button focusing is overrated because it causes so many problems! cameras were initially designed to focus with the half press of the shutter. For specific instances BBF is a good system, whereas for most general photography the idea of achieving with two presses of a button what could be achieved with one single press doubles the amount of work required for 1000 shots---that means 2000 operations. Is that better?

    There is a difference between professional cameras and consumer level and beginner level cameras. The pro level Nikons have a specific buttons three of them in fact on some models,two on others. Is metering to be combined with the focusing or separated?

    I preferred to leave the focus associated with the shutter release button and to use the back button as a focus like button gone but this sort of depends on your way of setting up the camera.

    If your camera has a focus lock button, and most do these days,I see very little benefit to removing the focus operation from the half press of the shutter button. In most general photography situations I think it is far better to get the new focus by simply pressing the shutter release button halfway and then if needed, pressing the AFL button or auto focus lock button with your right thumb and then pressing the shutter release button all the way.
     
    Last edited: Aug 13, 2019
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