Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and our Privacy Policy.
OK
Index  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Guest
New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Register to forums    Log in

 
FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 07 Oct 2013 (Monday) 17:56
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

Sending in Sigma 30mm 1.4 for adjustment

 
Dan ­ Kearley
Senior Member
421 posts
Likes: 31
Joined Aug 2012
     
Oct 07, 2013 17:56 |  #1

Has anyone done this before? I find the focus inconsistent on my copy.
(and I've have a couple copies... I kept the best one)

I expect focusing at 1.4 to be always problematic, but I find even stopped down, I have inconsistent focusing.. (both front and back)

It's going to be about 100$ to have Sigma do this... I'd love any input!


www.emotionalresponse.​ca (external link)

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)
nosam77
Hatchling
5 posts
Joined Oct 2009
     
Oct 07, 2013 18:42 |  #2

Your lens should come with a 4-year warranty from the date of purchase if you registered it. I sent in a 50mm awhile back to one of their authorized service centers awhile back (C.R.I.S. in Chandler, AZ) and they calibrated it no charge. Your T4i does not have micro adjustment so you may want to send in the body along with the lens. Hope this helps.




  
  LOG IN TO REPLY
Dan ­ Kearley
THREAD ­ STARTER
Senior Member
421 posts
Likes: 31
Joined Aug 2012
     
Oct 07, 2013 18:50 |  #3

Thanks. I bought this used.. so no warranty.

Also, ya... I expected to send body in.


www.emotionalresponse.​ca (external link)

  
  LOG IN TO REPLY
mannetti21
Goldmember
Avatar
3,227 posts
Gallery: 134 photos
Best ofs: 1
Likes: 498
Joined Sep 2010
Location: Connecticut
     
Oct 07, 2013 21:22 |  #4

That was the most frustrating lens I've ever owned. Went through 3 copies and multiple shipments to/from Sigma for service...I eventually exchanged for a 4th copy and sold it without ever taking it out of the box.

Good luck


---------------
5D4, 5D3, Powershot SD790 IS, Panasonic Lumix FX7, Nikon L35AF, Minolta SRT-102
35Art, 50 f1.8 STM, EF 85 f1.8, EF 16-35L f4, EF 100-400L II
My Buyer/Seller Feedback

  
  LOG IN TO REPLY
ejhc11
Member
Avatar
161 posts
Joined Jun 2012
Location: Orange County, CA
     
Oct 08, 2013 14:50 |  #5

Dan Kearley wrote in post #16353800 (external link)
Has anyone done this before? I find the focus inconsistent on my copy.
(and I've have a couple copies... I kept the best one)

I expect focusing at 1.4 to be always problematic, but I find even stopped down, I have inconsistent focusing.. (both front and back)

It's going to be about 100$ to have Sigma do this... I'd love any input!

My price quote for this was only $60. How did you contact them? I have a 50D which I bought for the AF Microadjust and a -8 setting fixed everything but it would be nice to use it on my other bodies w/o AF microadjust.


Gear and Feedback

  
  LOG IN TO REPLY
Dan ­ Kearley
THREAD ­ STARTER
Senior Member
421 posts
Likes: 31
Joined Aug 2012
     
Oct 08, 2013 15:09 |  #6

I emailed them thru the Canadian distributor I guess...Gentec.


www.emotionalresponse.​ca (external link)

  
  LOG IN TO REPLY
frugivore
Goldmember
Avatar
3,089 posts
Gallery: 11 photos
Likes: 118
Joined Aug 2010
Location: Toronto, Canada
     
Oct 08, 2013 15:19 |  #7

Dan Kearley wrote in post #16356215 (external link)
I emailed them thru the Canadian distributor I guess...Gentec.

If you bought the lens outside of Canada (i.e. no Canadian warranty) then you'll need to pay Gentec to service it. It was $50 when I did it. Did they raise the fee to $100? In most cases, it's still worth it as Canadian prices are much higher.

One thing that I would suggest is that you thoroughly test and document the issue(s) that the lens has. I had sent it and just told them that it had focus issues. It came back exactly as it was with no explanation. It was really my fault for not being specific.

Good luck with the repair.




  
  LOG IN TO REPLY
ejhc11
Member
Avatar
161 posts
Joined Jun 2012
Location: Orange County, CA
     
Oct 08, 2013 17:33 |  #8

Ok, my $60 fee was for Sigma USA


Gear and Feedback

  
  LOG IN TO REPLY
ereuter
Member
Avatar
71 posts
Likes: 1
Joined Sep 2013
Location: Kittery, Maine, USA
     
Oct 11, 2013 06:59 |  #9

I also had two copies of this lens at the same time. One focused perfectly on my 7D, and the other required an adjustment of +11. With the adjustment, it was fine. I sold that one, and warned the buyer. He didn't seem to care.


5D3; Canon TS-E 17L, TS-E 90, 85 1.4; Sigma 35 Art, 70-200; X100; EOS M

  
  LOG IN TO REPLY
Dan ­ Kearley
THREAD ­ STARTER
Senior Member
421 posts
Likes: 31
Joined Aug 2012
     
Oct 11, 2013 09:55 |  #10

So it's actually 120$, plus my initial shipping charges.
Now... the issues with the lens have been the same across a couple copies for me. I'm starting to think this isn't an uncommon issue. (it's not front or rear focusing.. it's just not 100% consistent)

I wonder if a used 30mm ART model would be a better long term solution. Reviews of them have been great.


www.emotionalresponse.​ca (external link)

  
  LOG IN TO REPLY
mwsilver
Goldmember
3,962 posts
Gallery: 52 photos
Likes: 513
Joined Oct 2011
Location: Central New Jersey
     
Oct 11, 2013 16:04 |  #11

Dan Kearley wrote in post #16353800 (external link)
Has anyone done this before? I find the focus inconsistent on my copy.
(and I've have a couple copies... I kept the best one)

I expect focusing at 1.4 to be always problematic, but I find even stopped down, I have inconsistent focusing.. (both front and back)

It's going to be about 100$ to have Sigma do this... I'd love any input!

Many of us have a love/hate relationship with this lens. I assume you have the EX DC HSM version, not the newer version without the EX in the name. There were a number of QC issues with this lens related to focus. Many seem to back or front focus. My first copy was decentered and sent back to B&H. The second copy back focused a bit so I brought my lens and camera, a 60D, to Sigma's US headquarters in Ronkonkama, NY an hours drive from my home. They fixed it for me while I waited. However, the focus algorithms Sigma uses are still problematic. Sometimes the lens focuses dead on, sometimes not. I have discovered after a significant amount of testing and pixel peeping that getting accurate focus on very small targets can be difficult, especially in low light. The more contrast the subject has, the more accurate the AF. The more edges and texture the subject has, the more accurate the AF. I find this problem to be at its worse at f/1.4, and as you stop down the problem gets less frequent. The lens also tends to be softer at the edges the wider you open the aperture. These are some of the reasons this lens was just replaced by Sigma. However, to paraphrase the nursery rhyme, "When it's good, its very very good, and when it bad it horrid" For me, it is more often very good than horrid. Here are a few good examples, IMHO.


Northern Vermont

IMAGE: http://farm8.staticflickr.com/7420/9229017002_1a0ae16869_b.jpg
IMAGE LINK: http://www.flickr.com …/75627613@N05/9​229017002/  (external link)
Boyden Winery, Vt, June 2013 Another view (external link) by mwsilver (external link), on Flickr


Smithsonian Air and Space Museum
IMAGE: http://farm9.staticflickr.com/8099/8498960263_b1e41e5b93_b.jpg
IMAGE LINK: http://www.flickr.com …/75627613@N05/8​498960263/  (external link)
13-02-23 Smithsonian DC3 (external link) by mwsilver (external link), on Flickr


Smithsonian Air and Space Museum - 100% crop
IMAGE: http://farm9.staticflickr.com/8385/8498958839_a393b02f06_b.jpg
IMAGE LINK: http://www.flickr.com …/75627613@N05/8​498958839/  (external link)
13-02-23 Smithsonian DC3 100% (external link) by mwsilver (external link), on Flickr


Smithsonian Air and Space Museum Apollo hatch cover taken through thick glass display window
IMAGE: http://farm9.staticflickr.com/8529/8505040248_0938ce1194_b.jpg
IMAGE LINK: http://www.flickr.com …/75627613@N05/8​505040248/  (external link)
Apollo 11 Hatch- Smithsonian - Sigma 30 mm (external link) by mwsilver (external link), on Flickr


Smithsonian Air and Space Museum - 100% crop of right side of Apollo hatch cover
IMAGE: http://farm9.staticflickr.com/8530/8503932341_0c173c1f15_b.jpg
IMAGE LINK: http://www.flickr.com …/75627613@N05/8​503932341/  (external link)
Apollo 11 Hatch- Smithsonian - Sigma 30 mm 100% (external link) by mwsilver (external link), on Flickr


Metropolitan Museum of Art, NYC
IMAGE: http://farm4.staticflickr.com/3801/9474381206_2aa4fa1c7b_b.jpg
IMAGE LINK: http://www.flickr.com …/75627613@N05/9​474381206/  (external link)
13-05-16- Metropolitan Museum of Art-14 (external link) by mwsilver (external link), on Flickr

Mark
Canon 7D2, 60D, T3i, T2i, Sigma 18-35 f/1.8, 30 f/1.4. Canon EF 70-200 L f/4 IS, EF 35 f/2 IS, EFs 10-18 STM, EFs 15-85, EFs 18-200, EF 50 f/1.8 STM, Tamron 18-270 PZD, B+W MRC CPL, Canon 320EX, Vanguard Alta Pro 254CT & SBH 250 head. RODE Stereo Videomic Pro, DXO PhotoLab Elite, ON1

  
  LOG IN TO REPLY
Dan ­ Kearley
THREAD ­ STARTER
Senior Member
421 posts
Likes: 31
Joined Aug 2012
     
Oct 11, 2013 16:18 |  #12

Thanks. Those ARE good. I'm going to look at an ART model this afternoon. We'll see.

And thanks for your info! Very helpful.


www.emotionalresponse.​ca (external link)

  
  LOG IN TO REPLY
mwsilver
Goldmember
3,962 posts
Gallery: 52 photos
Likes: 513
Joined Oct 2011
Location: Central New Jersey
     
Oct 11, 2013 16:41 |  #13

Dan Kearley wrote in post #16363787 (external link)
Thanks. Those ARE good. I'm going to look at an ART model this afternoon. We'll see.

And thanks for your info! Very helpful.

In case I confused you, these shots were taken with the older EX version, not the newer ART lens. I got my copy just before the ART version was released at an excellent $289 USD new. I probably would have preferred the ART version in retrospect, but at the price I paid I think it was a bargain. And I wasn't in a position to spend $500 for the ART at that time anyway.


Mark
Canon 7D2, 60D, T3i, T2i, Sigma 18-35 f/1.8, 30 f/1.4. Canon EF 70-200 L f/4 IS, EF 35 f/2 IS, EFs 10-18 STM, EFs 15-85, EFs 18-200, EF 50 f/1.8 STM, Tamron 18-270 PZD, B+W MRC CPL, Canon 320EX, Vanguard Alta Pro 254CT & SBH 250 head. RODE Stereo Videomic Pro, DXO PhotoLab Elite, ON1

  
  LOG IN TO REPLY
Dan ­ Kearley
THREAD ­ STARTER
Senior Member
421 posts
Likes: 31
Joined Aug 2012
     
Oct 11, 2013 16:53 |  #14

Ya, I understand that mwsilver... I'm checking out an ART model regardless.


www.emotionalresponse.​ca (external link)

  
  LOG IN TO REPLY
mwsilver
Goldmember
3,962 posts
Gallery: 52 photos
Likes: 513
Joined Oct 2011
Location: Central New Jersey
     
Oct 11, 2013 16:58 |  #15

Dan Kearley wrote in post #16363859 (external link)
Ya, I understand that mwsilver... I'm checking out an ART model regardless.

Its supposed to be quite an improvement over the older model. Good luck.


Mark
Canon 7D2, 60D, T3i, T2i, Sigma 18-35 f/1.8, 30 f/1.4. Canon EF 70-200 L f/4 IS, EF 35 f/2 IS, EFs 10-18 STM, EFs 15-85, EFs 18-200, EF 50 f/1.8 STM, Tamron 18-270 PZD, B+W MRC CPL, Canon 320EX, Vanguard Alta Pro 254CT & SBH 250 head. RODE Stereo Videomic Pro, DXO PhotoLab Elite, ON1

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)

2,293 views & 0 likes for this thread
Sending in Sigma 30mm 1.4 for adjustment
FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
AAA
x 1600
y 1600

Jump to forum...   •  Rules   •  Index   •  New posts   •  RTAT   •  'Best of'   •  Gallery   •  Gear   •  Reviews   •  Member list   •  Polls   •  Image rules   •  Search   •  Password reset

Not a member yet?
Register to forums
Registered members may log in to forums and access all the features: full search, image upload, follow forums, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, all settings, view hosted photos, own reviews, see more and do more... and all is free. Don't be a stranger - register now and start posting!


COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and to our privacy policy.
Privacy policy and cookie usage info.


POWERED BY AMASS forum software 2.1forum software
version 2.1 /
code and design
by Pekka Saarinen ©
for photography-on-the.net

Latest registered member is leeloming
786 guests, 213 members online
Simultaneous users record so far is 15144, that happened on Nov 22, 2018

Photography-on-the.net Digital Photography Forums is the website for photographers and all who love great photos, camera and post processing techniques, gear talk, discussion and sharing. Professionals, hobbyists, newbies and those who don't even own a camera -- all are welcome regardless of skill, favourite brand, gear, gender or age. Registering and usage is free.