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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 24 Aug 2014 (Sunday) 04:11
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Will I be able to return a mis-focusing lens?

 
Romax12
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Aug 24, 2014 04:11 |  #1

hi guys,

so Im in the market for a walkaround-travel-portrait lens for my t3i, and im pretty locked on the simga's art (50 or 35mm), but im afraid that I will get a copy with front/back foucsing.
i don't want to spend money on sigma's dock, and I don't want to haslle with that either.
so my questions are:

1. what are the chance of getting a bad focusing lens from sigma's art series?
2. Does front/back focusing considered a malfunctioning lens? or is it just something that can't be changed?
3. If I am getting a lens with a focus problem, will I be a ble to return it to the store, and get a new one/money back?


Canon t3i
--- EF-S 18-135 f3.5-5.6 IS --- EF 70-200 f2.8 L IS usm ---
600ex-rt and yn-622c (2x)

  
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Reservoir ­ Dog
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Aug 24, 2014 04:25 |  #2

1) may be 1 on 1000 or 10 000, who knows ?...
2)no, and yes you can adjust this one with the micro autofocus adjustment of your camera
3)yes


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Canon ­ Bob
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Aug 24, 2014 06:14 |  #3

Reservoir Dog wrote in post #17114276 (external link)
2)no, and yes you can adjust this one with the micro autofocus adjustment of your camera

I don't believe that the T3i (600D) has micro-adjustement.

Bob


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Aug 24, 2014 06:42 |  #4

Canon Bob wrote in post #17114338 (external link)
I don't believe that the T3i (600D) has micro-adjustement.

Bob

You can do the microadjustment in the lens using Sigma's usb dock.


Bodies: X-T1, E-M1ii, G9 Lenses: µ.Z 7-14 2.8, µ.Z 12-40 2.8, µ.Z 25 1.2, X 18-55 2.8-4, µ.Z 40-150 2.8, µ.Z 45 1.2, µ.Z 60 2.8, µ.Z 75 1.8, PL 200 2.8

  
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Romax12
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Aug 24, 2014 06:51 |  #5

thanks for the suggestion, but I already wrote that I dont want to hassle with getting a usb dock etc'...
I just read everywhere that alot of guys are reporting front/back foucusing on these lenses and im a bit worried that I will get one with front-focusing and I will have to buy the dock...


Canon t3i
--- EF-S 18-135 f3.5-5.6 IS --- EF 70-200 f2.8 L IS usm ---
600ex-rt and yn-622c (2x)

  
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raptor3x
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Aug 24, 2014 07:36 |  #6

Romax12 wrote in post #17114365 (external link)
thanks for the suggestion, but I already wrote that I dont want to hassle with getting a usb dock etc'...
I just read everywhere that alot of guys are reporting front/back foucusing on these lenses and im a bit worried that I will get one with front-focusing and I will have to buy the dock...

It's really not much hassle, but honestly, if you're not willing to go through the hassle of adjusting the AF then you should probably stay away from f/1.4 lenses.


Bodies: X-T1, E-M1ii, G9 Lenses: µ.Z 7-14 2.8, µ.Z 12-40 2.8, µ.Z 25 1.2, X 18-55 2.8-4, µ.Z 40-150 2.8, µ.Z 45 1.2, µ.Z 60 2.8, µ.Z 75 1.8, PL 200 2.8

  
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Reservoir ­ Dog
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Aug 24, 2014 08:03 |  #7

Romax12 wrote in post #17114365 (external link)
thanks for the suggestion, but I already wrote that I dont want to hassle with getting a usb dock etc'...
I just read everywhere that alot of guys are reporting front/back foucusing on these lenses and im a bit worried that I will get one with front-focusing and I will have to buy the dock...

Cutting a tree make a lot more noise than a forest which is growing up (specially when the tree fall down and the noise is amplified/repeated by the echo) ;)


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Romax12
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Aug 24, 2014 08:50 |  #8

Reservoir Dog wrote in post #17114432 (external link)
Cutting a tree make a lot more noise than a forest which is growing up (specially when the tree fall down and the noise is amplified/repeated by the echo) ;)

lol wat?
you mean that I only think that because im aware of that?
like when you want to buy a new car suddenly you see it like 100 times a day?


Canon t3i
--- EF-S 18-135 f3.5-5.6 IS --- EF 70-200 f2.8 L IS usm ---
600ex-rt and yn-622c (2x)

  
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artyH
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Aug 24, 2014 09:00 |  #9

If you want to be "safe" get the Canon 35F2 IS. It is less likely to require microadjust, which the T3i does not have. If the Sigma doesn't focus properly, you can return it, but only of you buy it from a dealer with a good return policy.
If worried, and you don't want the dock, get the Canon. Sigma sells the dock for a reason. Sigma used to say that their F1.4 lenses were suitable only for cameras with microadjust. They stopped making this statement, and came out with the dock.
Of all my lenses, the only one I returned for AF problems was a Canon 85F1.8, and this was to Amazon (not a third party seller). The 85 has very shallow depth of field at F1.8.
I highly recommend the Canon 35F2 IS.




  
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carpenter
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Aug 24, 2014 09:10 |  #10

Buy from Amazon if you are worried. You will have 30 days to test it and see if it has issues. If it has any issues you will return it on their dime. You don't even have to ship it yourself as they will send UPS to come pick it up for you at your door.


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losangelino
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Aug 24, 2014 09:14 |  #11

They come with 3 year warranties. You'll be fine



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Aug 24, 2014 09:16 |  #12

Romax12 wrote in post #17114476 (external link)
lol wat?
you mean that I only think that because im aware of that?
like when you want to buy a new car suddenly you see it like 100 times a day?

No :lol: ;)
Cutting a tree make a lot more noise than a forest which is growing up (specially when the tree fall down and the noise is amplified/repeated by the echo)

In this case you can interpret it this way :
Cutting a tree make more noise
> People which are no happy with a product will speak a lot about it (make a lot of noise)
than a forest which is growing up > People which are happy with a product or something will say nothing, and they are a lot
the noise is amplified/repeated by the echo > all these people which only repeat and amplified what they "heard" without knowing/owning the product, or these people which swear only by Canon (for example) and are happy to pin more up about what they "heard" bad

Don't listen too much and have a leap of faith, the Sigma Art is an excellent line ;)


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MalVeauX
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Aug 24, 2014 09:46 |  #13

Romax12 wrote in post #17114261 (external link)
hi guys,

so Im in the market for a walkaround-travel-portrait lens for my t3i, and im pretty locked on the simga's art (50 or 35mm), but im afraid that I will get a copy with front/back foucsing.
i don't want to spend money on sigma's dock, and I don't want to haslle with that either.
so my questions are:

1. what are the chance of getting a bad focusing lens from sigma's art series?
2. Does front/back focusing considered a malfunctioning lens? or is it just something that can't be changed?
3. If I am getting a lens with a focus problem, will I be a ble to return it to the store, and get a new one/money back?

Heya,

1. I bought an ART. It had significant front/back focusing at different distances. I bought the USB Dock to adjust it. I couldn't get it perfect. I wasn't ok with not perfect.

2. There's a range & threshold for different lenses & bodies and makes. It's not a malfunction, it's just copy variation and it's behavior with your particular body. It will vary camera to camera too.

3. I returned mine with no questions. I bought it from Amazon specifically for their no question asked return policy (from Amazon, not a third party through Amazon; there's a difference).

I ended up with the 35 F2 IS from Canon, and I'm much happier with it anyways with it's serious IS abilities, and it's sharp wide open.

Very best,


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pkim1230
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Aug 24, 2014 09:54 |  #14

I don't have experience with ART series but I have used three Sigma lenses before, 2 bought new, 1 bought used.
New Sigma 30mm f1.4 newer non-pearl version has no issues with focus.
New Sigma 10-20mm f4-5.6 had no issues with focus.
Used Sigma 17-70mm contemporary had no issues with focus.



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DreDaze
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Aug 24, 2014 10:19 |  #15

it doesn't make sense to me to not buy the usb dock...it's ridiculously simple, and it's cheap

as long as you buy at a reputable store, you should be able to return it with no problems, but i'd strongly recommend getting the dock...


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Will I be able to return a mis-focusing lens?
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