Having an issue with my new D7100

Started Apr 7, 2013 | Discussions
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Rhinofly New Member • Posts: 10
Having an issue with my new D7100

I really like this camera and it seems to work great with all my lenses except one, my 80-200 2.8 af-d. With this lens I am getting significant backfocus. Even with the lens fine tune set to -20 it is still backfocusing about 2cm and I cannot get anything at small f number in sharp focus.

If I use this lens on my D5100 and manual focus (using focus indicator dot) I can get nice sharp pictures.

The fine tune corrections on my other lenses are

18-55 DX VR : +1

35 1.8 DX : 0

12-24 DX : -8

There is no obvious systematic back focus in general, just a really terrible one with the 80-200. Any ideas on how to go about fixing this? Could it be the lens and not the camera?

Thanks!

Nikon D5100 Nikon D7100
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scokill Senior Member • Posts: 2,486
Re: Having an issue with my new D7100

Rhinofly wrote:

I really like this camera and it seems to work great with all my lenses except one, my 80-200 2.8 af-d. With this lens I am getting significant backfocus. Even with the lens fine tune set to -20 it is still backfocusing about 2cm and I cannot get anything at small f number in sharp focus.

If I use this lens on my D5100 and manual focus (using focus indicator dot) I can get nice sharp pictures.

The fine tune corrections on my other lenses are

18-55 DX VR : +1

35 1.8 DX : 0

12-24 DX : -8

There is no obvious systematic back focus in general, just a really terrible one with the 80-200. Any ideas on how to go about fixing this? Could it be the lens and not the camera?

Thanks!

Doesn't seem to be an "issue" with your camera but rather your lens/camera combination.  How do you really determine +1 on the 18-55 dx?

 scokill's gear list:scokill's gear list
Nikon D610 Nikon Df Nikon AF-S DX Nikkor 16-85mm f/3.5-5.6G ED VR Nikon AF-S Nikkor 70-200mm f/2.8G ED VR II Nikon AF Nikkor 50mm f/1.8D +1 more
BlueBomberTurbo Senior Member • Posts: 1,059
Re: Having an issue with my new D7100

Remember, you can also adjust the body independently of the lens adjustment.  So you can go beyond -20, though you'd have to compensate any other lens you've already calibrated.

 BlueBomberTurbo's gear list:BlueBomberTurbo's gear list
Sony a6000 Sony Alpha a6300 Sony E 18-55mm F3.5-5.6 OSS Sigma 70-200mm F2.8 EX DG Macro HSM II Sigma 17-50mm F2.8 EX DC OS HSM +7 more
Rhinofly OP New Member • Posts: 10
Re: Having an issue with my new D7100

BlueBomberTurbo wrote:

Remember, you can also adjust the body independently of the lens adjustment.  So you can go beyond -20, though you'd have to compensate any other lens you've already calibrated.

I did not know this. How does one do this?

Mako2011
Mako2011 MOD Forum Pro • Posts: 20,265
not true

BlueBomberTurbo wrote:

Remember, you can also adjust the body independently of the lens adjustment.  So you can go beyond -20, though you'd have to compensate any other lens you've already calibrated.

Not really true. If the lens has a fine tune setting, it overrides the global setting. The two are never cumulative.  Been tested.

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My opinions are my own and not those of DPR or its administration. They carry no 'special' value (except to me and Lacie of course)

sshoihet Senior Member • Posts: 2,540
Re: not true

Mako2011 wrote:

BlueBomberTurbo wrote:

Remember, you can also adjust the body independently of the lens adjustment.  So you can go beyond -20, though you'd have to compensate any other lens you've already calibrated.

Not really true. If the lens has a fine tune setting, it overrides the global setting. The two are never cumulative.  Been tested.

-- hide signature --

My opinions are my own and not those of DPR or its administration. They carry no 'special' value (except to me and Lacie of course)

Yes but i believe it was shown that the global adjustment allows for more compensation ie - 20 global is a greater distance than - 20 for an individual lens,  so it is actually helpful as long as you don't need to correct more than one lens this way.

 sshoihet's gear list:sshoihet's gear list
Nikon D7000 Canon EOS M Nikon D600 Nikon D7100 Nikon AF-S DX Nikkor 16-85mm f/3.5-5.6G ED VR +13 more
Mako2011
Mako2011 MOD Forum Pro • Posts: 20,265
Re: not true

sshoihet wrote:

Mako2011 wrote:

BlueBomberTurbo wrote:

Remember, you can also adjust the body independently of the lens adjustment.  So you can go beyond -20, though you'd have to compensate any other lens you've already calibrated.

Not really true. If the lens has a fine tune setting, it overrides the global setting. The two are never cumulative.  Been tested.

-- hide signature --

My opinions are my own and not those of DPR or its administration. They carry no 'special' value (except to me and Lacie of course)

Yes but i believe it was shown that the global adjustment allows for more compensation ie - 20 global is a greater distance than - 20 for an individual lens,

Haven't seen that shown anywhere when tested with same lens.

-- hide signature --

My opinions are my own and not those of DPR or its administration. They carry no 'special' value (except to me and Lacie of course)

krikman Regular Member • Posts: 404
Re: Having an issue with my new D7100

Rhinofly wrote:

I really like this camera and it seems to work great with all my lenses except one, my 80-200 2.8 af-d. With this lens I am getting significant backfocus. Even with the lens fine tune set to -20 it is still backfocusing about 2cm and I cannot get anything at small f number in sharp focus.

If I use this lens on my D5100 and manual focus (using focus indicator dot) I can get nice sharp pictures.

The fine tune corrections on my other lenses are

18-55 DX VR : +1

35 1.8 DX : 0

12-24 DX : -8

There is no obvious systematic back focus in general, just a really terrible one with the 80-200. Any ideas on how to go about fixing this? Could it be the lens and not the camera?

Thanks!

Did you test 80-200 AF-D on 200 mm?

This lens have correct AF on 200 mm only at 30+ meters distance.

At closer distances it have strong backfocus.

So please fine tune AF at 100 mm focal distance and don't even try to shoot closer objects at around 200 mm.

Lens is fine at 10+ meters and excellent at 50+ meters (all at f/2,8 200 mm )

That was issued by Nikon somewhere as property of lens design.

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