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Thread started 28 Feb 2014 (Friday) 21:50
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How to focus manually to infinity?

 
kezug
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Feb 28, 2014 21:50 |  #1

I have a G12, that when focusing manually, I can push it to infinity and this works great for night shots.

I just picked up a 700D/T5i with the 18-55 IS STM lens. I am puzzled how to do the same thing with this lens for manual focus to infinity as the focus ring does no have any start/stop point?


Camera's: 70D, G12 | Len's: 18-135mm IS STM, 55-250mm IS STM, 50mm f/1.8 II | Photos:flickr (external link)

  
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samsen
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Feb 28, 2014 22:07 |  #2

Use your LiveView, when image is magnified 5 or 10 times. Should be very easy to clearly focus on camera's LCD at that magnification.


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kezug
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Feb 28, 2014 22:12 |  #3

That is exactly what I did! :) But I wasnt sure if I was fooling myself with that method and thought there must be a different way.


Camera's: 70D, G12 | Len's: 18-135mm IS STM, 55-250mm IS STM, 50mm f/1.8 II | Photos:flickr (external link)

  
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PH68
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Mar 01, 2014 15:54 |  #4

As above.
Just use Live View in x10 magnification to focus on a distant object (such as a star).

Works for me.


5Diii | 35/2 | 100/2.8L | 300/4L

  
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samsen
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Mar 02, 2014 10:52 |  #5

kezug wrote in post #16725602 (external link)
That is exactly what I did! :) But I wasnt sure if I was fooling myself with that method and thought there must be a different way.

No you are not fooling around. That is as long as you eye sight is good enough.
Also using a tripod when working with very high magnifications (Larger tele lenses) is strongly recommended as any tiny shake of camera, prevent you to achieve that critical focusing.

But then for the sake of completion, if you are too objective and need to do everything is a scientific way, go do you home work on "Bahtinov Focus-Mask" or its variants such as three hole mask. They are the ultimate manual focusing methods for high end mag telescope, lens in manual mode but you need to do a bit of ingenuity with the DIY ability to make one specially if you are working with a small camera,(Not difficult at all) once you learn the technique.

And not to forget another very important point, not to change zoom or touch the lens, once critical focus is achieved (And very friendly I dare you on this:)).


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How to focus manually to infinity?
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