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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 25 Nov 2014 (Tuesday) 02:26
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soft pics with new 70-200

 
ChunkyDA
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Nov 29, 2014 21:25 |  #31

What happens when you photograph a shoe on the ground? Use only the center point and focus directly on the shoe at various distances in full sun. Is the ground sharp in front or behind the shoe or is nothing sharp? Do this at 2.8, something in a line perpendicular to you should be tack sharp.


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ed ­ rader
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Nov 29, 2014 21:40 |  #32

hollis_f wrote in post #17295647 (external link)
Probably far enough for atmospheric distortion to have an effect.

also a very poor choice for a subject when testing sharpness.


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Nov 29, 2014 21:51 |  #33

I would expect to count seams and rivets on that aerostat, just like any subject at an air show. Also atmosphere effect would be consistent across the last 3 shots.


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Nov 29, 2014 22:00 |  #34

hollis_f wrote in post #17295647 (external link)
Probably far enough for atmospheric distortion to have an effect.

I was going to say that.

also a very poor choice for a subject when testing sharpness.

and this.


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Dec 01, 2014 23:26 |  #35

thanks guys, as soon as i can get some free time to shoot some more pics i will. it's really not the pic taking, its the uploading of the pics..


-james
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Dec 04, 2014 02:00 |  #36

CheshireCat wrote in post #17297515 (external link)
Optically, your lens is fine.
Now follow step 2 and 3 in my previous post and let us know.

the three pictures, one focused, one fuzzy, and one really fuzzy were taken with your information.

i know the 'subject' is far away, but i would figure this lens would be a bit more sharp on 'all' pics. granted im new to it, and still learning, that's why i posted this thread in the first place to hear and learn from the others.

many, many people own this lens, and if it wasn't so great they wouldnt own it.

that's why got it, and now learning how to use it..


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Dec 04, 2014 17:55 |  #37

Seems you have an AF problem. It may be user error.
The best way to check this is setting the AF to use only the center point on a high contrast subject. Let the lens focus and as soon as the focus confirmation is on, press the shutter to take the picture. Do not recompose after focusing. Between each test, move the focusing ring, so the lens is forced to refocus.
The lens should consistently focus correctly.

Note also that if you zoom in or out, your lens will shift focus (it is not a parfocal lens), so you will have to refocus after zooming.

Also, for this test I do not recommend using the back AF button. Just use the shutter half-press to focus and then full press to take the shot.


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Dec 06, 2014 09:55 |  #38

here is a pic taken tonight, about 5 feet away, tripod mounted. original, and 100% crop


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Dec 06, 2014 12:38 |  #39

f19?!?!?!?


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Dec 06, 2014 12:48 |  #40

DreDaze wrote in post #17316339 (external link)
f19?!?!?!?


got to figure out what works and what doesn't. take pics, have fun, and enjoy doing it..


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Dec 06, 2014 13:05 |  #41

bk2life wrote in post #17316363 (external link)
got to figure out what works and what doesn't. take pics, have fun, and enjoy doing it..

i'm all for fun, and enjoyment...but if you're taking this shot to test sharpness...f19 isn't the way to go...diffraction will cause your shots to look less sharp than they would at say f8, or so...

and i honestly can only think of a few instances where you'll be using such a small aperture on the 70-200mm...panning is one instance, but there i'm not sure if sharpness is the ultimate goal


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Dec 06, 2014 17:25 |  #42

LOL I'm so used to 1/3 stop exposure values, so I just set my camera to 1/2 stop exposure values to try and get this unseen aperture value and giggled when I saw f/19 on the upper display. Weird!  :p

/off topic

At least those examples are sharp.


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bk2life
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Dec 07, 2014 00:54 |  #43

koala yummies wrote in post #17316854 (external link)
LOL I'm so used to 1/3 stop exposure values, so I just set my camera to 1/2 stop exposure values to try and get this unseen aperture value and giggled when I saw f/19 on the upper display. Weird!  :p

/off topic

At least those examples are sharp.

yes, im just playin around.. that's what is nice about the digital world.. i have several examples at 2.8, but i was really tryin to ge the entire extender in focus, not just the wording, that's more of why i went so 'big'


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bk2life
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Dec 07, 2014 00:56 as a reply to  @ DreDaze's post |  #44

i have several examples at 2.8, but i was really tryin to ge the entire extender in focus, not just the wording, that's more of why i went so 'big'

plus it's hard for me to get out my gear and have several hours of play time, or things to 'focus' on. i am on a small FOB in southern afg.


-james
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Post edited over 7 years ago by bk2life.
     
Dec 07, 2014 01:07 |  #45

IMAGE: http://ifitsgotwheels.com/pictures/var/resizes/Afghan/AFGHAN-2/right%20footy.jpg?m=1417935789
Here is a foot selfie..

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