Back Focussing Problem

[Kancil39]

Need Help. Any of member here experiencing back focus? Previous wedding shoot I had a quite a number of back focussing pixs. Just need to know wat's the cause of back focussing. Is it due to camera faulty, camera setting or space between photographer & subject. Equipment using Nikon D200 & 17-35 f2.8. Pls Advice. Below are the 2 of the few images that were back focussing. Focussing was aim at the bride but end up the back were sharp. Maybe the guru Stanley can help me.:)

F/L:22mm, F5.6, 1/60 sec, Iso/400, Matrix Metering.

http://i205.photobucket.com/albums/bb247/ridz_sandaime/ONE_5424.jpg

22mm, F5.6, 1/60 sec, Iso/400, Matrix Metering.

http://i205.photobucket.com/albums/bb247/ridz_sandaime/ONE_5425.jpg

[harrynkl]

want to ask which focus point u using center or multiple?

[harrynkl]

shoot on a newpaper at a angle on a particular letter then view if it out of focus.

[Kancil39]

want to ask which focus point u using center or multiple?

I'm using centre.

[harrynkl]

have u try the paper test i tell u?

[Kancil39]

have u try the paper test i tell u?

Yes, I done it a few times but ok leh or maybe just bring to NSC & let them check.

[Ricky]

Together with the camera and lense.

[Stanley]

Sometime is the back light too strong it will cause back focussing problem also! But if your problem only for a few pictures only than forget it if you shoot for more than 1000 pics. Sometime is you never lock your focus properly!

[Kancil39]

Sometime is the back light too strong it will cause back focussing problem also! But if your problem only for a few pictures only than forget it if you shoot for more than 1000 pics. Sometime is you never lock your focus properly!

Thks Stanley. Really appreciate it.

[steel]

shoot on a newpaper at a angle on a particular letter then view if it out of focus.
Hi,
I have done this test on my Konica Minolta 7D before. I shoot on a ruler but the intended focus point is slightly out. Any place I can go for adjustment?
(Lens 17-35 f2.8)

Regards

[Kancil39]

Ha ha, Stanley should be able to answer your problem coz he use K.M 7D before upgrade to @700.:coolnod:

[Stanley]

Hi,
I have done this test on my Konica Minolta 7D before. I shoot on a ruler but the intended focus point is slightly out. Any place I can go for adjustment?
(Lens 17-35 f2.8)

Regards

Ok! You can test on your manual focus first! Than test on auto focus. See which one give you better sharpness? But i know 7D problems...... to me is suck man the focusing! Because it don't build in with the IR focusing assis! It always give you back focusing problem! I'm using the 17-35 f2.8 also for many event! End up the background is sharper than the subjects man!
What you need to do is to focus others point on your subject, and use your eyes to see your subject is sharp or not??? Many cameras got this problem when using wide angle lens!
But A700 Very Very Good lar!

[Ricky]

Ok! You can test on your manual focus first! Than test on auto focus. See which one give you better sharpness? But i know 7D problems...... to me is suck man the focusing! Because it don't build in with the IR focusing assis! It always give you back focusing problem! I'm using the 17-35 f2.8 also for many event! End up the background is sharper than the subjects man!
What you need to do is to focus others point on your subject, and use your eyes to see your subject is sharp or not??? Many cameras got this problem when using wide angle lens!
But A700 Very Very Good lar!

He's asking which service centre can solve the problem or not... Still can send in to Sony or not?

[Lone Wolf]

Hi,
I have done this test on my Konica Minolta 7D before. I shoot on a ruler but the intended focus point is slightly out. Any place I can go for adjustment?
(Lens 17-35 f2.8)

RegardsI don't know know of any 17-35mm lens that has a constant max aperture of f2.8. Is the lens a Minolta, Sony or other 3rd party? Does this happen with only this lens or other lenses as well?

[Stanley]

He's asking which service centre can solve the problem or not... Still can send in to Sony or not?

Oh! Ya ho! I talk so much and never give him the ans? I believe he still can send in to Sony centre, to let them check it up! But he still can try the Camera Hospital lor! He can do it very well too! If i'm not wrong?

[leejiing]

Just bring your body and lens to Sony Service Centre at Orchard Wisma and leave some of your test shots in a CF card for the engineer to see.

This will help as they can guage how much BF or FF there is need to be adjusted.

Do test on other lenses and see if you could replicate the problem. If its just the 17-35, then it might be the lens has misaligned elements. Hope this helps.

[steel]

I don't know know of any 17-35mm lens that has a constant max aperture of f2.8. Is the lens a Minolta, Sony or other 3rd party? Does this happen with only this lens or other lenses as well?
Sorry guys.. jus managed to land my fingers on the keyboard. sorry(mine is the minolta 17-35 f2.8-f3.5) Will go check on the manual vs auto focus.. I dun like to go SONY center cos' their charges is very high. I asked about the rubber cap replace for my 5600HD flash and they quoted me $140. :eek:

[Stanley]

Sorry guys.. jus managed to land my fingers on the keyboard. sorry(mine is the minolta 17-35 f2.8-f3.5) Will go check on the manual vs auto focus.. I dun like to go SONY center cos' their charges is very high. I asked about the rubber cap replace for my 5600HD flash and they quoted me $140. :eek:

What rubber cap is that??? Sooooo Expensive? If you got time than you can come down to SLCC, i can help you to check also, and hope that i can solve your problems! A few of them are using Sony camera in SLCC! I used it more than 15 years liao, old name Minolta!!!