Do I have front focus issues with my XSi?

I am using a XSi with the kit lens. Sometimes I find the images a little soft.

I ran the focus test chart. I used a tripod with the camera at 45 degrees per the instructions.

Here is a 100% crop

HTTP response: NOT FOUND | MIME changed to 'image/png'

i dont think it meant 45* from the side. the front is closer than the back by shooting at this angle. so it looks good. try an L lens and see if it seems soft

It's a little to the front, but that's normal as the centre of the DOF goes back as you close the aperture

Are you noticing any problems in normal day to day shooting?

There are certain problems with these test charts... I'd only resort to them if I suspected a problem in the first place.

JoYork wrote in post #6135929
Are you noticing any problems in normal day to day shooting?

There are certain problems with these test charts... I'd only resort to them if I suspected a problem in the first place.

I think many people get screwy results shooting that chart - I have.

There are two common problems, ones I've seen over and over on POTN:

• Shooting with the camera off-center from the chart, leading to a sideways tilt;
  
• Shooting so the chart fills the viewfinder.

number six wrote in post #6139174
My conclusion was that the 45 degree chart is not to be trusted.

-js

Yeah, the chart does create more problems than it does solve. Most of the people who post a relatively well shot test chart end up not having a problem but aren't happy because the center line isn't exactly in the middle of the DOF like they imagine it should be...

I have had spotty results using the focus charts. The setup has to be perfect. Latly I have switched back to the good old battery test. It seems to do much better. Check out this link.
https://photography-on-the.net …hp?p=5885029&po​stcount=22

I have also modified it using soup cans to get a little more distance from the subject.

I just did the battery test with 3 batteries. It looks like the focus is ok because the middle battery is focused and the left and right ones are blurred. I guess I didn't position my camera correctly for the focus chart.

I think I'm having some front-focus problems with my camera -- I've shot with a 50/1.8, 17-55, and 70-200, and I've been getting mixed results. I have a few pictures --

****

Image 1: ceiling fan (not sharp)
http://netfiles.uiuc.e​du …/Fan%20--%20unfocused.JPG

Image 2: ceiling fan (sharp)
http://netfiles.uiuc.e​du …hy/Fan%20--%20focused.JPG

Focused on the root of the blade (where the blade meets the motor, more or less). Slightly different apertures, but should be stopped down enough not to have affected the results this much -- I would think. (names got mixed up... sorry)

****

Image 3: cable box (not sharp)
http://netfiles.uiuc.e​du …0box%20--%20unfocused.JPG

Image 4: cable box (sharp)
http://netfiles.uiuc.e​du …%20box%20--%20focused.JPG

Focused on "interactive digital communications" letters. Same (exact) settings for both shots -- one focused, one did not.

****

Image 5: panel van (AF)
http://netfiles.uiuc.e​du …raphy/Truck%20--%20AF.JPG

Image 6: panel van (manual focus)
http://netfiles.uiuc.e​du …raphy/Truck%20--%20MF.JPG

Ruler test: center AF point was set to the 6" mark.

Ruler test -- AF
https://netfiles.uiuc.​edu …uler%20test%20--%20AF.JPG

Ruler test -- MF through 10x LV
https://netfiles.uiuc.​edu …uler%20test%20--%20MF.JPG

***

Nikon D70 focus test page: focused on as the instructions said... on the black line in the center of the page.

Focus test -- AF
https://netfiles.uiuc.​edu …ocus%20test%20--%20AF.JPG

Focus test -- MF
https://netfiles.uiuc.​edu …ocus%20test%20--%20MF.JPG

Building -- AF
http://netfiles.uiuc.e​du …ography/Buildin​g%201.JPG;

Building -- MF
http://netfiles.uiuc.e​du …ography/Buildin​g%202.JPG;

Any thoughts?

There have been some sharp images, mind you; these are just to show contrast between what I think are properly-focused shots and what are somewhere out of focus. I haven't ruled out operator error, but it's the consistency of missing focus tests that scares me.

Bump, if I may -- would appreciate more eyes and any associated comments!

tigerotor77w wrote in post #6848392
Bump, if I may -- would appreciate more eyes and any associated comments!

Sure looks as if it's front focusing to me. Pretty clear by the focus chart. I am assuming that you focused on the "focus here" bar, the camera was tripod mounted so no focus and recompose errors and such. Time to send it into Canon for a little adjustment.

I didn't get an email saying that I had a reply -- sorry for not replying!

Appreciate the help. I had wanted to go the exchange (I'm still within B&H's timeframe and shutter count) route, but I might go the calibration route now -- a friend just came over with a 35/1.4 L and it was spot on.

Did some more testing (apologize for the reflection down the center of the batteries -- I didn't have a table an appropriate height and the light just glared from the front.

Center AF and focused near the center batteries... I can't remember if the AF dot lined up with the space of if the batteries were shifted enough that I managed to find the actual front surface of the battery.

17-55:
http://netfiles.uiuc.e​du …Battery%20tests​/17_AF.jpg

http://netfiles.uiuc.e​du …Battery%20tests​/28_AF.jpg

http://netfiles.uiuc.e​du …Battery%20tests​/55_AF.jpg

50/1.8:
http://netfiles.uiuc.e​du …Battery%20tests​/50_AF.jpg

70-200:
http://netfiles.uiuc.e​du …Battery%20tests​/70_AF.jpg

http://netfiles.uiuc.e​du …attery%20tests/​116_AF.jpg

It seems that my two smaller lenses are the culprit, not the body. I did a test with a 35/1.4 L and its focus was better than in my tests with my 50/1.8 and 17/55:

http://netfiles.uiuc.e​du …Battery%20tests​/35_AF.jpg

Therefore, with this information, I might just ask Canon for a shipping label and send off the lenses for calibration. The question: is it irrational to fear shipping brand new lenses and a brand new body just for calibration? Will they come back dinged up or molested? Again, this could be an irrational fear of mine -- that only I am capable of taking care of my possessions as I want them taken care of -- but looking for reassurance nonetheless.

Any additional thoughts?

I guess it's difficult for people to give an honest response without seeing how exactly I'm going about these tests, but any general observations?

Hi guys....
The link (http://farm4.static.fl​ickr.com/3632/...5303e​6b1_b.jpg) shows an image taken by me in the real world. I think it demonstrates front focus. I was focusing on the birdie's eye using the centre point AF on my EOS450D ait AI+SERVO (tracks the target) focusing in the eye. To me the grass on the left foreground looks more in focus.

Q1> Shud I give my lens and cam for calibration ?

Q2? Could their performance go bad after the recalibration ?
I am happy with the EF-S18-55mm IS images as well as the 50 mmf/1.8. Will their performance degrade with my re-calibrated 450d ?

I have posted this query in another thread too
https://photography-on-the.net …9&mode=linear#p​ost7908639

I have sent this query to canon marketing Thailand. I do not know how long the camera and lens will be away and I hope they fix it satisfactorily.