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 Sample Photo Archives Lens Sample Photo Archive 
Thread started 23 Feb 2006 (Thursday) 20:24
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

Sigma 30mm f1.4 EX DC HSM

 
Courterman08
Senior Member
655 posts
Likes: 1
Joined Jul 2010
Location: Lima, OH
     
Apr 03, 2012 19:38 |  #6781

tomcat7886 wrote in post #14200305 (external link)
nice bokeh. ;)

i think my copy has a bit of a front focus issue, thoughts? ;)


Zach Courter
Flickr (external link)

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)
touji
Senior Member
891 posts
Likes: 1
Joined Oct 2011
Location: Northern Virginia
     
Apr 03, 2012 21:50 |  #6782

I absolutely love this lens but I'm pretty sure my copy has a front focus issue. Either that or the 1.4 aperture is so razor thin that I can't control it to save my life! Is there any easy way to test this out?

IMAGE: http://farm8.staticflickr.com/7094/6895130846_7efbbc9929_z.jpg
IMAGE LINK: http://www.flickr.com/​photos/touji192/689513​0846/  (external link)
IMG_6210 (external link) by touji192 (external link), on Flickr

5D Mark III | Gripped 60D | EOS M | Sigma 30mm f1.4 | Canon 24-70mm f2.8L II | Canon 8-15mm f4L | Canon 50mm f1.8II | Canon 100L | Tamron 150-600mm
flickr (external link)
500px (external link)
Shooting Since 10/16/2011!

  
  LOG IN TO REPLY
mco_970
Senior Member
350 posts
Likes: 1
Joined May 2009
Location: SW Colorado
     
Apr 03, 2012 22:49 |  #6783

touji wrote in post #14206009 (external link)
I absolutely love this lens but I'm pretty sure my copy has a front focus issue. Either that or the 1.4 aperture is so razor thin that I can't control it to save my life! Is there any easy way to test this out?

Put it on a tripod and test w/ a shutter release cable and MLU with a ruler type target. It should be easy to see front focus in controlled testing.

I am dropping by this thread, though, to ask how the focus speed of the Siggy 30 compares to the 35L. Can anyone comment? I have a 5D2 and 7D, and am thinking about buying this lens for the 7D rather than buying the 35L. I'm on a kick of using the 7D a lot lately anyway. :)


Michelle - 7D, 40 STM, 400 f/5.6, 500 f/4.5, NEX, and going Nikon FF - eager to see what 7D2 brings!

STOLEN from me in Colorado 7/6/2011: 1D3 (serial 505764),
FM feedback (external link)

  
  LOG IN TO REPLY
touji
Senior Member
891 posts
Likes: 1
Joined Oct 2011
Location: Northern Virginia
     
Apr 04, 2012 01:34 |  #6784

^ I'll have to get myself a ruler then! I really hope it isn't a front focus issue because it will be difficult for me to get through all the procedures to send it in to the Sigma Japan branch!


5D Mark III | Gripped 60D | EOS M | Sigma 30mm f1.4 | Canon 24-70mm f2.8L II | Canon 8-15mm f4L | Canon 50mm f1.8II | Canon 100L | Tamron 150-600mm
flickr (external link)
500px (external link)
Shooting Since 10/16/2011!

  
  LOG IN TO REPLY
mco_970
Senior Member
350 posts
Likes: 1
Joined May 2009
Location: SW Colorado
     
Apr 04, 2012 09:01 |  #6785

touji wrote in post #14206920 (external link)
^ I'll have to get myself a ruler then! I really hope it isn't a front focus issue because it will be difficult for me to get through all the procedures to send it in to the Sigma Japan branch!

You can use anything - a folded strip of newspaper, a set of batteries standing up at an angle... There are a lot of test targets you can print off of the internet (see TeamSpeed's home made target instructions). :)


Michelle - 7D, 40 STM, 400 f/5.6, 500 f/4.5, NEX, and going Nikon FF - eager to see what 7D2 brings!

STOLEN from me in Colorado 7/6/2011: 1D3 (serial 505764),
FM feedback (external link)

  
  LOG IN TO REPLY
vinmunoz
Cream of the Crop
Avatar
17,033 posts
Gallery: 441 photos
Best ofs: 4
Likes: 9169
Joined Sep 2010
Location: California
     
Apr 04, 2012 09:29 |  #6786

touji wrote in post #14206009 (external link)
I absolutely love this lens but I'm pretty sure my copy has a front focus issue. Either that or the 1.4 aperture is so razor thin that I can't control it to save my life! Is there any easy way to test this out?

QUOTED IMAGE
IMAGE LINK: http://www.flickr.com/​photos/touji192/689513​0846/  (external link)
IMG_6210 (external link) by touji192 (external link), on Flickr

Do you do "focus in the center and recompose technique" at F1.4? I think it's not advisable at wide open.


| VINZ - SONY A7RIII/A6000/FDR-X3000 | 85GM | FE1635GM | FE50F1.8 | SEL30mm F3.5 Macro |
INSTAGRAM (external link)- WEBSITE (external link) - FACEBOOK (external link) - 500PX (external link)

  
  LOG IN TO REPLY
Jason ­ Paul
Senior Member
Avatar
387 posts
Likes: 6
Joined Feb 2011
     
Apr 04, 2012 10:02 as a reply to  @ vinmunoz's post |  #6787

If it helps, this is how I tested mine - and adjusted the MA on my 50D.

I had this idea, then it was confirmed (with a slight tweak) by finding the same setup here on the forum, though I don't remember how I found it, or the user.

Anyway, here's what I did:

1. Got a fairly large box with some contrasty points.

2. Stacked a few DVDs (and some paper) high enough to lift that box up so that a yardstick would just fit under it.

3. Put the yardstick under the box at an angle, and lined up the 17" mark exactly with the surface of the box.

4. Set my camera up on a book at the other end of the table, so the focus point would be on the 17" mark - or it could have been on a contrasty point on the box itself, probably. I don't have a tripod, which is why I used the book.

5. Also, I measured the distance of each side of the book from the surface of the subject box. This was to ensure (as best I could) that the sensor surface remained parallel to the surface of the subject box. You want to make sure that you are shooting directly perpendicular to the subject - especially when shooting at f/1.4. I hope this makes sense in text.

I know this isn't the most scientific testing method, and it's probably not as good as some of the MA software out there, but I did the best I could with what I had. I feel like I got better results with this than I did by using a normal focus chart or shooting an angled shot of the yardstick alone. I think it helps to shoot perpendicularly at a flat surface, while adding the yardstick to determine front- or back- focusing.

Anyway, here's a photo of the setup. Hopefully this plus the description above will be helpful.

IMAGE: http://farm8.staticflickr.com/7177/6824768122_ae46478dc7_b.jpg
IMAGE LINK: http://www.flickr.com …/64178563@N08/6​824768122/  (external link)
IMG_4918-focustest (external link) by JasonPaultx (external link), on Flickr

I kept going back and forth with my MA adjustments. It almost seems like the 18" mark looks more in-focus than the 17" mark, but I looked as closely as I could - even at 200% in the raw file - and I think the 17" mark looks clearest.

Also, while doing this, I would take pictures of my daughter at each MA setting, focusing on her eye. With these test shots, plus the "real life" pictures of my daughter, it seemed that +4 MA got me the clearest focus. I've left it there and everything so far seems good.

Jason

50D - Canon 60mm Macro - Sigma 30mm - Canon 70-300mm DO IS - Canon 17-85mm IS - Canon 50mm 1.8 II
Flickr (external link)

  
  LOG IN TO REPLY
mco_970
Senior Member
350 posts
Likes: 1
Joined May 2009
Location: SW Colorado
     
Apr 04, 2012 10:14 as a reply to  @ Jason Paul's post |  #6788

Jason - very nice setup! :) I have moved on to FoCal software, but this setup is similar to what I used before, too. Currency - with it's fine markings - makes a good test target as well.


Michelle - 7D, 40 STM, 400 f/5.6, 500 f/4.5, NEX, and going Nikon FF - eager to see what 7D2 brings!

STOLEN from me in Colorado 7/6/2011: 1D3 (serial 505764),
FM feedback (external link)

  
  LOG IN TO REPLY
touji
Senior Member
891 posts
Likes: 1
Joined Oct 2011
Location: Northern Virginia
     
Apr 04, 2012 10:22 |  #6789

Thanks for some example setups for the focusing!

I am not using focus and recompose, but I'm using AI Servo and holding my back focus button down but trying to snap the shot before the subject moves from the initial focus.

I've taken some great shots with the lens but a lot of times if someone is wearing a hat or they are leaning back, I'll miss focus completely. In the real life situation, it seems like I'm not getting as many keepers as I should and hopefully this test will be able to help me out a lot.


5D Mark III | Gripped 60D | EOS M | Sigma 30mm f1.4 | Canon 24-70mm f2.8L II | Canon 8-15mm f4L | Canon 50mm f1.8II | Canon 100L | Tamron 150-600mm
flickr (external link)
500px (external link)
Shooting Since 10/16/2011!

  
  LOG IN TO REPLY
scroller52
Senior Member
964 posts
Likes: 1
Joined Dec 2009
Location: NYC
     
Apr 04, 2012 11:02 |  #6790

as a long time siggy 30 user, finally contributing....
its become my go to walk around lens. adding my sub as well :)

1

IMAGE: https://lh6.googleusercontent.com/-I_H_Zc_Ru5I/T3xvHtkjgeI/AAAAAAAAOQE/EYQu98quoPw/s800/1.jpg

2
IMAGE: https://lh3.googleusercontent.com/-f52AIEu-QCo/Tuqjfhu-lKI/AAAAAAAANlw/45McwLy2MW8/s800/IMG_9382.jpg

Canon EOS 5D3 | Canon 24mm 1.4L mkII | Canon 85mm 1.2L mkI | Canon 40mm 2.8
my flickr (external link)
my picasa (external link)

  
  LOG IN TO REPLY
Jason ­ Paul
Senior Member
Avatar
387 posts
Likes: 6
Joined Feb 2011
     
Apr 04, 2012 11:25 as a reply to  @ scroller52's post |  #6791

I guess I may as well post a "real life" photo, even though I was still just testing for microadjustment. :)

This shot is cropped quite a bit (not 100% though). No other PP other than normal sharpening with unsharp mask in DPP. Focus is on the right eye (her left). I think this is acceptably sharp at f/1.4:

IMAGE: http://farm8.staticflickr.com/7056/6817299374_8768d3646b_c.jpg
IMAGE LINK: http://www.flickr.com …/64178563@N08/6​817299374/  (external link)
IMG_4823-focus30mm-CENTER (external link) by JasonPaultx (external link), on Flickr

Jason

50D - Canon 60mm Macro - Sigma 30mm - Canon 70-300mm DO IS - Canon 17-85mm IS - Canon 50mm 1.8 II
Flickr (external link)

  
  LOG IN TO REPLY
dohan_appa
Member
Avatar
211 posts
Joined Dec 2010
     
Apr 05, 2012 11:00 as a reply to  @ vinmunoz's post |  #6792

touji wrote in post #14206009 (external link)
I absolutely love this lens but I'm pretty sure my copy has a front focus issue. Either that or the 1.4 aperture is so razor thin that I can't control it to save my life! Is there any easy way to test this out?

QUOTED IMAGE
IMAGE LINK: http://www.flickr.com/​photos/touji192/689513​0846/  (external link)
IMG_6210 (external link) by touji192 (external link), on Flickr

I had 2 copies of Siggy 30mm and both were front focusing. First one was from Amazon, shipped back the day after focusing test. Second one was from Adorama and they even did pairing service for me so I can avoid having to return the lens. I guess what was acceptable to them was not acceptable for me, so I ended up shipping the lens along with my T2i to Sigma Service Center in NY. I got my lens and camera back in exactly 1 week including shipping time. Focus is now right on, however,

Looking back, I wish I had kept the lens from Amazon for calibration work instead. Although front focusing issue was more severe, that lens was extremely sharp wide open. It was out of focus at the AF target but very sharp where it was focusing. Now I gotta stop it down quite a bit to get really sharp picture. Everyone say Amazon is the way to go in terms of return policy.


Steve

  
  LOG IN TO REPLY
dohan_appa
Member
Avatar
211 posts
Joined Dec 2010
     
Apr 05, 2012 11:27 |  #6793

Free Focus Test Charts
http://www.dphotojourn​al.com …ad-free-focus-test-chart/ (external link)
https://photography-on-the.net/forum/showthre​ad.php?t=750736


Steve

  
  LOG IN TO REPLY
dngphoto
Senior Member
Avatar
384 posts
Joined Nov 2011
     
Apr 06, 2012 00:37 |  #6794

IMAGE: http://dngphotoandfilm.files.wordpress.com/2012/04/mustang_1.jpg?w=950
IMAGE: http://dngphotoandfilm.files.wordpress.com/2012/04/mustang2_1.jpg?w=1024&h=676

Sean - dngphoto&film 5dii Gripped / Σ 50 1.4 / Canon 28-135 USM / Σ 12-24 HSM

  
  LOG IN TO REPLY
touji
Senior Member
891 posts
Likes: 1
Joined Oct 2011
Location: Northern Virginia
     
Apr 06, 2012 01:21 |  #6795

This one was a pretty big crop! I have yet to find a printer to print out some charts T_T

IMAGE: http://farm8.staticflickr.com/7237/6903756930_dbe4e4cf41_z.jpg
IMAGE LINK: http://www.flickr.com/​photos/touji192/690375​6930/  (external link)
IMG_6328 (external link) by touji192 (external link), on Flickr

5D Mark III | Gripped 60D | EOS M | Sigma 30mm f1.4 | Canon 24-70mm f2.8L II | Canon 8-15mm f4L | Canon 50mm f1.8II | Canon 100L | Tamron 150-600mm
flickr (external link)
500px (external link)
Shooting Since 10/16/2011!

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

2,815,344 views & 47 likes for this thread
Sigma 30mm f1.4 EX DC HSM
FORUMS Sample Photo Archives Lens Sample Photo Archive 
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 Sofun111
841 guests, 268 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.