Sigma 50mm Art 1.4 Focusing problems

[IsaacImage]

Hello dear friends

After 4 copies of Sigma I'm a bit disappointed.
It's a gorgeous piece of glass but needs adjustments.
All copies are front focusing from the beginning and needs +13 or +17 depends on bodies.
So I decided to return and wait a bit longer.
Really don't think new lens should be adjusted at all !!!
Especially when Canon's 50L hit every single time…. but it's much softer

Please share your experience with this lens.

 

[kaihp]

After 4 copies of Sigma I'm a bit disappointed.
It's a gorgeous piece of glass but needs adjustments.
All copies are front focusing from the beginning and needs +13 or +17 depends on bodies.
So I decided to return and wait a bit longer.
Really don't think new lens should be adjusted at all !!!

Please share your experience with this lens.

Are those adjustments consistent, or do you need to change the AFMA from time to time, that's the real question to ask yourself. We have two forum members who have had to return their 50A lenses to Sigma because they couldn't focus reliably. Sure, 13-17 is a lot, but consistent (correct) focus beats inconsistent focus every time.

Please have a look at the http://www.canonrumors.com/forum/index.php?topic=20723.0 thread.

 

[IsaacImage]

After 4 copies of Sigma I'm a bit disappointed.
It's a gorgeous piece of glass but needs adjustments.
All copies are front focusing from the beginning and needs +13 or +17 depends on bodies.
So I decided to return and wait a bit longer.
Really don't think new lens should be adjusted at all !!!

Please share your experience with this lens.

Are those adjustments consistent, or do you need to change the AFMA from time to time, that's the real question to ask yourself. We have two forum members who have had to return their 50A lenses to Sigma because they couldn't focus reliably. Sure, 13-17 is a lot, but consistent (correct) focus beats inconsistent focus every time.

Please have a look at the http://www.canonrumors.com/forum/index.php?topic=20723.0 thread.

Unfortunately it's a very inconsistent results, more like hit and miss, at least on two of the lenses.

 

[candyman]

After 4 copies of Sigma I'm a bit disappointed.
It's a gorgeous piece of glass but needs adjustments.
All copies are front focusing from the beginning and needs +13 or +17 depends on bodies.
So I decided to return and wait a bit longer.
Really don't think new lens should be adjusted at all !!!

Please share your experience with this lens.

Are those adjustments consistent, or do you need to change the AFMA from time to time, that's the real question to ask yourself. We have two forum members who have had to return their 50A lenses to Sigma because they couldn't focus reliably. Sure, 13-17 is a lot, but consistent (correct) focus beats inconsistent focus every time.

Please have a look at the http://www.canonrumors.com/forum/index.php?topic=20723.0 thread.

Unfortunately it's a very inconsistent results, more like hit and miss, at least on two of the lenses.

Did you use Focal software for AFMA or manually with a product like Spyder LensCal?

 

[IsaacImage]

After 4 copies of Sigma I'm a bit disappointed.
It's a gorgeous piece of glass but needs adjustments.
All copies are front focusing from the beginning and needs +13 or +17 depends on bodies.
So I decided to return and wait a bit longer.
Really don't think new lens should be adjusted at all !!!

Please share your experience with this lens.

Are those adjustments consistent, or do you need to change the AFMA from time to time, that's the real question to ask yourself. We have two forum members who have had to return their 50A lenses to Sigma because they couldn't focus reliably. Sure, 13-17 is a lot, but consistent (correct) focus beats inconsistent focus every time.

Please have a look at the http://www.canonrumors.com/forum/index.php?topic=20723.0 thread.

Unfortunately it's a very inconsistent results, more like hit and miss, at least on two of the lenses.

Did you use Focal software for AFMA or manually with a product like Spyder LensCal?

With Spyder Lenscal only…. didn't have much time for the Focal

 

[candyman]

After 4 copies of Sigma I'm a bit disappointed.
It's a gorgeous piece of glass but needs adjustments.
All copies are front focusing from the beginning and needs +13 or +17 depends on bodies.
So I decided to return and wait a bit longer.
Really don't think new lens should be adjusted at all !!!

Please share your experience with this lens.

Are those adjustments consistent, or do you need to change the AFMA from time to time, that's the real question to ask yourself. We have two forum members who have had to return their 50A lenses to Sigma because they couldn't focus reliably. Sure, 13-17 is a lot, but consistent (correct) focus beats inconsistent focus every time.

Please have a look at the http://www.canonrumors.com/forum/index.php?topic=20723.0 thread.

Unfortunately it's a very inconsistent results, more like hit and miss, at least on two of the lenses.

Did you use Focal software for AFMA or manually with a product like Spyder LensCal?

With Spyder Lenscal only…. didn't have much time for the Focal

Seems to exclude a theory but I am no techie. I thought that maybe the Sigma circuitboard can not handle the Focal AFMA software adjustments and could be a reason that after the AFMA with Focal the Lens is totally screwed.
Oh well, it is really a pitty for Sigma and this lens that the saga with AF seems to continue. For now, I don't have problems with the 50A on my 6D. I need to do some checking on the 5D MKIII. I can't believe the Sigma has problems with specific the 61-points AF of the 1DX and 5D MKIII. I am sure that Sigma did a good checking on that since they this is an very desirable target group for their 50A.

 

[IsaacImage]

let's wait and see how Sigma going to handle it.
As for me I'm in love with this lens and want this lens so bad…… but those "Hit and miss" games remind me d800 days and I don't want to play this shitty game again

 

[Eldar]

I just got my replacement lens. I have not had time to run it through FoCal yet, but did a quick test on LensAlign. To begin with, there is no need for adjustment on this one, but I need more time to see if the inconsistencies appear on this one also.

Regarding Sigma and FoCal; FoCal gives information to use with the camera, not the lens. You adjust the AFMA on the body. On a 1DX and 5DIII, as I have, you even have to do all the adjustments manually. The only adjustment that influences the lens is done through Sigma´s own USB dock.

 

[candyman]

I just got my replacement lens. I have not had time to run it through FoCal yet, but did a quick test on LensAlign. To begin with, there is no need for adjustment on this one, but I need more time to see if the inconsistencies appear on this one also.

Regarding Sigma and FoCal; FoCal gives information to use with the camera, not the lens. You adjust the AFMA on the body. On a 1DX and 5DIII, as I have, you even have to do all the adjustments manually. The only adjustment that influences the lens is done through Sigma´s own USB dock.

Good to hear you got a replacement and good to hear the first sign is a good one.
Thanks for your explanation about focal / camera / lens.


I used the dock for firmware upgrade only

 

[Viggo]

4 copies? Ouch, more of the same experience I have, and mine is awaiting a new motherboard.

Mine was between +11 and +17 and the different distances , but then one day I also had to add +12 in camera to get anything focused right. So all I can say is +1 to your experience, mine was the exact same way.

I will update in the ongoing thread about the 50 Art when I get it back.
But this does not give me very high hopes...

 

[IsaacImage]

I just got my replacement lens. I have not had time to run it through FoCal yet, but did a quick test on LensAlign. To begin with, there is no need for adjustment on this one, but I need more time to see if the inconsistencies appear on this one also.

Regarding Sigma and FoCal; FoCal gives information to use with the camera, not the lens. You adjust the AFMA on the body. On a 1DX and 5DIII, as I have, you even have to do all the adjustments manually. The only adjustment that influences the lens is done through Sigma´s own USB dock.

Glad to hear that Eldar !

So all the in camera adjustments are not effective ? and it's must to have USB dock to adjust the 50th ?

 

[IsaacImage]

4 copies? Ouch, more of the same experience I have, and mine is awaiting a new motherboard.

Mine was between +11 and +17 and the different distances , but then one day I also had to add +12 in camera to get anything focused right. So all I can say is +1 to your experience, mine was the exact same way.

I will update in the ongoing thread about the 50 Art when I get it back.
But this does not give me very high hopes...

Definitely something wrong with the first batch.
But after all those years I think Sigma should be very careful especially with the first shipments of their product, to keep the brand high !
As it's not easy to recover the brand.

 

[Eldar]

I just got my replacement lens. I have not had time to run it through FoCal yet, but did a quick test on LensAlign. To begin with, there is no need for adjustment on this one, but I need more time to see if the inconsistencies appear on this one also.

Regarding Sigma and FoCal; FoCal gives information to use with the camera, not the lens. You adjust the AFMA on the body. On a 1DX and 5DIII, as I have, you even have to do all the adjustments manually. The only adjustment that influences the lens is done through Sigma´s own USB dock.

Glad to hear that Eldar !

So all the in camera adjustments are not effective ? and it's must to have USB dock to adjust the 50th ?

With the dock you can adjust the total focus from MFD to infinity in 4 sections. I have not figured out the scale yet, but you can do a +/-20 adjustment, just like in FoCal, so it might be that it is same same. For this lens (and the 35 Art) Sigma should have calibrated them prior to shipping though ...

 

[Viggo]

4 copies? Ouch, more of the same experience I have, and mine is awaiting a new motherboard.

Mine was between +11 and +17 and the different distances , but then one day I also had to add +12 in camera to get anything focused right. So all I can say is +1 to your experience, mine was the exact same way.

I will update in the ongoing thread about the 50 Art when I get it back.
But this does not give me very high hopes...

Definitely something wrong with the first batch.
But after all those years I think Sigma should be very careful especially with the first shipments of their product, to keep the brand high !
As it's not easy to recover the brand.

I think the issue is much more serious than a first batch problem, myself an others had the same issues with the 35 Art as well. All I can say is that if my 50 Art doesn't work after repair, I'm sooo done with Sigma ..

 

[IsaacImage]

4 copies? Ouch, more of the same experience I have, and mine is awaiting a new motherboard.

Mine was between +11 and +17 and the different distances , but then one day I also had to add +12 in camera to get anything focused right. So all I can say is +1 to your experience, mine was the exact same way.

I will update in the ongoing thread about the 50 Art when I get it back.
But this does not give me very high hopes...

Definitely something wrong with the first batch.
But after all those years I think Sigma should be very careful especially with the first shipments of their product, to keep the brand high !
As it's not easy to recover the brand.

I think the issue is much more serious than a first batch problem, myself an others had the same issues with the 35 Art as well. All I can say is that if my 50 Art doesn't work after repair, I'm sooo done with Sigma ..

In my case I got 35 Art from the first batch.
And zero … yes ZERO problems !!!

 

[Viggo]

4 copies? Ouch, more of the same experience I have, and mine is awaiting a new motherboard.

Mine was between +11 and +17 and the different distances , but then one day I also had to add +12 in camera to get anything focused right. So all I can say is +1 to your experience, mine was the exact same way.

I will update in the ongoing thread about the 50 Art when I get it back.
But this does not give me very high hopes...

Definitely something wrong with the first batch.
But after all those years I think Sigma should be very careful especially with the first shipments of their product, to keep the brand high !
As it's not easy to recover the brand.

I think the issue is much more serious than a first batch problem, myself an others had the same issues with the 35 Art as well. All I can say is that if my 50 Art doesn't work after repair, I'm sooo done with Sigma ..

In my case I got 35 Art from the first batch.
And zero … yes ZERO problems !!!

Exactly..

 

[aznable]

got my 50 Art two days ago...perfect with 50D a a pronunced FF with 1dmk3....solution....fine tune with the dock, now the focus is good with 1dmk3 and with in body regulation with 50D, now i get good results with both bodies

 

[Viggo]

got my 50 Art two days ago...perfect with 50D a a pronunced FF with 1dmk3....solution....fine tune with the dock, now the focus is good with 1dmk3 and with in body regulation with 50D, now i get good results with both bodies

Yes, so was Eldar's and mine also, shoot another 4000 images in and out and see if it changes .

 

[aznable]

got my 50 Art two days ago...perfect with 50D a a pronunced FF with 1dmk3....solution....fine tune with the dock, now the focus is good with 1dmk3 and with in body regulation with 50D, now i get good results with both bodies

Yes, so was Eldar's and mine also, shoot another 4000 images in and out and see if it changes .

4k? too much

the focus is consistent tough

 

[Viggo]

got my 50 Art two days ago...perfect with 50D a a pronunced FF with 1dmk3....solution....fine tune with the dock, now the focus is good with 1dmk3 and with in body regulation with 50D, now i get good results with both bodies

Yes, so was Eldar's and mine also, shoot another 4000 images in and out and see if it changes .

4k? too much

the focus is consistent tough

I have three batteries, just run through three batteries and you have shot 4000 images. Do half and you still be able to see the drift is there..