October 21, 2014, 01:10:24 PM

Author Topic: whats up with my focus?  (Read 2499 times)

scoobert

  • Power Shot G7X
  • **
  • Posts: 20
    • View Profile
whats up with my focus?
« on: November 26, 2012, 10:56:02 AM »
this is my 7D with a tameron 10-24.
why is the focus so far off?
does my camera hate this lens?




File Name: IMG_1574.jpg (Edit)

File Size: 694 kb - 1875 x 1250

Camera Make: Canon

Camera Model: Canon EOS 7D

Date/Time: 2012:11:20 11:21:28

Resolution: 1875 x 1250

Flash Used: No

Focal Length: 10.0mm (35mm equivalent: 16mm...

CCD Width: 23.04mm

Exposure Time: 0.0050 s (1/200)

Aperture: f/3.5

ISO Equiv.: 2500

Whitebalance: Auto

Metering Mode: pattern

Exposure: Manual

Exposure Mode: Manual

canon rumors FORUM

whats up with my focus?
« on: November 26, 2012, 10:56:02 AM »

daveheinzel

  • PowerShot G1 X II
  • ***
  • Posts: 48
    • View Profile
    • daveheinzel.com
Re: whats up with my focus?
« Reply #1 on: November 26, 2012, 11:12:36 AM »
That image is comparable to my best images with the 7D when I shoot at such a high ISO. That's why I usually stick with 1250 or less. Focus looks fine though. Try at a low ISO and see if that makes a difference. Corners on lenses that wide are usually a bit distorted.

scoobert

  • Power Shot G7X
  • **
  • Posts: 20
    • View Profile
Re: whats up with my focus?
« Reply #2 on: November 26, 2012, 11:17:23 AM »
running a lower ISO will sharpen up the image?
looks like my other lense does it too...


File Name: IMG_1570.jpg (Edit)

File Size: 692 kb - 1892 x 1261

Camera Make: Canon

Camera Model: Canon EOS 7D

Date/Time: 2012:11:20 10:55:23

Resolution: 1892 x 1261

Flash Used: No

Focal Length: 18.0mm (35mm equivalent: 28mm...

CCD Width: 23.04mm

Exposure Time: 0.0080 s (1/125)

Aperture: f/3.5

ISO Equiv.: 2500

Whitebalance: Auto

Metering Mode: pattern

Exposure: Manual

Exposure Mode: Manual

neuroanatomist

  • CR GEEK
  • ********
  • Posts: 14710
    • View Profile
Re: whats up with my focus?
« Reply #3 on: November 26, 2012, 11:19:53 AM »
Have you done autofocus microadjustment for those lenses?

What are all those little boxes in the second image, with things like Tmax and Ektar on them?   :P
EOS 1D X, EOS M, and lots of lenses
______________________________
Flickr | TDP Profile/Gear List

scoobert

  • Power Shot G7X
  • **
  • Posts: 20
    • View Profile
Re: whats up with my focus?
« Reply #4 on: November 26, 2012, 11:46:30 AM »
how do you do that?

those little boxes are some type of permanent recording memory, tiny unusable photos. one time use, can you believe it?

actually that store has a huge film camera customer base.

neuroanatomist

  • CR GEEK
  • ********
  • Posts: 14710
    • View Profile
Re: whats up with my focus?
« Reply #5 on: November 26, 2012, 12:57:37 PM »
those little boxes are some type of permanent recording memory, tiny unusable photos. one time use, can you believe it?

Weird.  Just...weird.  Thanks for clarifying!

As for AFMA, here's a place to start:  http://www.the-digital-picture.com/Photography-Tips/AF-Microadjustment-Tips.aspx

Currently, I just use Reikan FoCal software.
EOS 1D X, EOS M, and lots of lenses
______________________________
Flickr | TDP Profile/Gear List

awinphoto

  • Canon EF 300mm f/2.8L IS II
  • *******
  • Posts: 2002
    • View Profile
    • AW Photography
Re: whats up with my focus?
« Reply #6 on: November 26, 2012, 02:25:36 PM »
running a lower ISO will sharpen up the image?
looks like my other lense does it too...


File Name: IMG_1570.jpg (Edit)

File Size: 692 kb - 1892 x 1261

Camera Make: Canon

Camera Model: Canon EOS 7D

Date/Time: 2012:11:20 10:55:23

Resolution: 1892 x 1261

Flash Used: No

Focal Length: 18.0mm (35mm equivalent: 28mm...

CCD Width: 23.04mm

Exposure Time: 0.0080 s (1/125)

Aperture: f/3.5

ISO Equiv.: 2500

Whitebalance: Auto

Metering Mode: pattern

Exposure: Manual

Exposure Mode: Manual

I'm not positive what Noise Reduction you are using if any... but if you have NR on, it CAN soften the image as it tries to squash the noise...  So a lower ISO with no NR needed will look sharper than a high ISO with NR applied.  Personally it looks acceptable, micro adjust can fix it a tad, but it looks like a NR thing to me... 
Canon 5d III, Canon 24-105L, Canon 17-40L, Canon 70-200 F4L, Canon 100L 2.8, Canon 85 1.8, 430EX 2's and a lot of bumps along the road to get to where I am.

canon rumors FORUM

Re: whats up with my focus?
« Reply #6 on: November 26, 2012, 02:25:36 PM »

zim

  • 5D Mark III
  • ******
  • Posts: 737
    • View Profile
Re: whats up with my focus?
« Reply #7 on: November 26, 2012, 03:42:08 PM »
Perfect example of how content and story is far more important than IQ, NR and all the rest put together, I’m drooling for all those lil’ 135 boxes. Bet that shop smells real great and yes I have a totally romantic unrealistic view of the past. ;)

sandymandy

  • Canon 7D MK II
  • *****
  • Posts: 602
    • View Profile
Re: whats up with my focus?
« Reply #8 on: November 26, 2012, 04:19:04 PM »
running a lower ISO will sharpen up the image?
l

Higher ISO = more noise = less details (since the details get replaced by the.....noise!)
Focus looks fine.

Turn off in-camera auto lighting optimizer, noise reduction, tone priority mode and then see what comes out.



ashmadux

  • Rebel T5i
  • ****
  • Posts: 146
  • Art Director, Visual Artist, Freelance Photography
    • View Profile
    • Edward Ofori Photography
Re: whats up with my focus?
« Reply #9 on: November 26, 2012, 04:59:16 PM »
this is why i sold my 7d. Terrible focus....after it decided not to anymore. Was great at first.

and with no other canon body in its class, good luck with this one.

Be the best you, screw everything else.

Kristofgss

  • PowerShot G1 X II
  • ***
  • Posts: 67
    • View Profile
Re: whats up with my focus?
« Reply #10 on: November 26, 2012, 05:19:48 PM »
Can you try taking the picture with both live view and without live view? I had a misfocussing 7D. Since the live view mechanism focuses differently from the phase detection mechanism, you can see if they result in the same image or a different sharpness. If the sharpness is better with live view, then you can send it back to canon for recalibration. My 7D worked perfectly once they did that and I dearly love how accurate it is now.

bycostello

  • 1D Mark IV
  • ******
  • Posts: 910
    • View Profile
    • London Weddings
Re: whats up with my focus?
« Reply #11 on: November 26, 2012, 07:16:37 PM »
a shot like that, i.e. no depth you can shoot at f8 and that will help...

canon rumors FORUM

Re: whats up with my focus?
« Reply #11 on: November 26, 2012, 07:16:37 PM »