Sigma 105mm f1.4

Labantam said:

Good afternoon.

I was recently given a Sigma 105mm 1.4.

I just took a bunch of portraits on my Nikon D850 at 1.4. . Most of the frames missed my focus on the talents eye and instead focused on there ear or around the ear. A few did focus on the closest eye which is what my focus points where aimed at, but many did not.

Any thoughts on focus? I have back focus going on as well as continues focus

I am shooting a boxer hitting the bag. Fast shutter and wide open. Just been a bit disappointed with my results

Thanks

Click to expand...

Labantam said:

Good afternoon.

I was recently given a Sigma 105mm 1.4.

I just took a bunch of portraits on my Nikon D850 at 1.4. . Most of the frames missed my focus on the talents eye and instead focused on there ear or around the ear. A few did focus on the closest eye which is what my focus points where aimed at, but many did not.

Any thoughts on focus? I have back focus going on as well as continues focus

I am shooting a boxer hitting the bag. Fast shutter and wide open. Just been a bit disappointed with my results

Thanks

Click to expand...

xpatUSA said:

Labantam said:

Good afternoon.

I was recently given a Sigma 105mm 1.4.

I just took a bunch of portraits on my Nikon D850 at 1.4. . Most of the frames missed my focus on the talents eye and instead focused on there ear or around the ear. A few did focus on the closest eye which is what my focus points where aimed at, but many did not.

Any thoughts on focus? I have back focus going on as well as continues focus

I am shooting a boxer hitting the bag. Fast shutter and wide open. Just been a bit disappointed with my results

Thanks

Click to expand...

This is the Sigma Camera forum.

You might get better help over on Nikon FX or Third Party Lens ...

Click to expand...

Labantam said:

Good afternoon.

I was recently given a Sigma 105mm 1.4.

I just took a bunch of portraits on my Nikon D850 at 1.4. . Most of the frames missed my focus on the talents eye and instead focused on there ear or around the ear. A few did focus on the closest eye which is what my focus points where aimed at, but many did not.

Any thoughts on focus? I have back focus going on as well as continues focus

I am shooting a boxer hitting the bag. Fast shutter and wide open. Just been a bit disappointed with my results

Thanks

Click to expand...

SigmaChrome said:

xpatUSA said:

Labantam said:

Good afternoon.

I was recently given a Sigma 105mm 1.4.

I just took a bunch of portraits on my Nikon D850 at 1.4. . Most of the frames missed my focus on the talents eye and instead focused on there ear or around the ear. A few did focus on the closest eye which is what my focus points where aimed at, but many did not.

Any thoughts on focus? I have back focus going on as well as continues focus

I am shooting a boxer hitting the bag. Fast shutter and wide open. Just been a bit disappointed with my results

Thanks

Click to expand...

This is the Sigma Camera forum.

You might get better help over on Nikon FX or Third Party Lens ...

Click to expand...

Why Ted... why?

The poster is asking about a Sigma lens. Plenty of Sigma Camera Forum members use Sigma lenses and have some knowledge of how they work. It's perfectly reasonable to ask about Sigma lenses here.

Click to expand...

Ceistinne said:

Labantam said:

Good afternoon.

I was recently given a Sigma 105mm 1.4.

I just took a bunch of portraits on my Nikon D850 at 1.4. . Most of the frames missed my focus on the talents eye and instead focused on there ear or around the ear. A few did focus on the closest eye which is what my focus points where aimed at, but many did not.

Any thoughts on focus? I have back focus going on as well as continues focus

I am shooting a boxer hitting the bag. Fast shutter and wide open. Just been a bit disappointed with my results

Thanks

Click to expand...

Labantam,

What I meant in my earlier reply was that you should use the AF Fine Tune in your D850 to calibrate the lens focus with your camera. You'll find it in the spanner area of the menus. Most lenses need fine tuning with DSLR cameras.

S

Click to expand...

SandyF said:

Ceistinne said:

What I meant in my earlier reply was that you should use the AF Fine Tune in your D850 to calibrate the lens focus with your camera. You'll find it in the spanner area of the menus. Most lenses need fine tuning with DSLR cameras.

S

Click to expand...

S, just curious, can we adjust lenses in some manner through a menu item on any of our Sigma cameras, or is that a Nikon thing? I've neve heard the term 'spanner'....?

Click to expand...

SandyF said:

Ceistinne said:

Labantam said:

Good afternoon.

I was recently given a Sigma 105mm 1.4.

I just took a bunch of portraits on my Nikon D850 at 1.4. . Most of the frames missed my focus on the talents eye and instead focused on there ear or around the ear. A few did focus on the closest eye which is what my focus points where aimed at, but many did not.

Any thoughts on focus? I have back focus going on as well as continues focus

I am shooting a boxer hitting the bag. Fast shutter and wide open. Just been a bit disappointed with my results

Thanks

Click to expand...

Labantam,

What I meant in my earlier reply was that you should use the AF Fine Tune in your D850 to calibrate the lens focus with your camera. You'll find it in the spanner area of the menus. Most lenses need fine tuning with DSLR cameras.

S

Click to expand...

S, just curious, can we adjust lenses in some manner through a menu item on any of our Sigma cameras, or is that a Nikon thing? I've neve heard the term 'spanner'....?

Click to expand...

Labantam said:

Good afternoon.

I was recently given a Sigma 105mm 1.4.

I just took a bunch of portraits on my Nikon D850 at 1.4. . Most of the frames missed my focus on the talents eye and instead focused on there ear or around the ear. A few did focus on the closest eye which is what my focus points where aimed at, but many did not.

Any thoughts on focus? I have back focus going on as well as continues focus

I am shooting a boxer hitting the bag. Fast shutter and wide open. Just been a bit disappointed with my results

Thanks

Click to expand...