Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-07-2009, 02:48 AM   #1
Inactive Account




Join Date: Jun 2007
Posts: 31
Is my Sigma 70-200mm F2.8 EX DG MACRO HSM II a bit soft?

I've had this lens for a couple of weeks now and although I'm generally pleased with it I can't help but thinking it's a bit soft wide open. I haven't done any mirror up tripod shots yet but plan to after the weekend. Has anyone else got any experience with this lens or any 2.8 pictures they can post so I can compare sharpness? just noticed my fat fingered thread title!

05-07-2009, 02:56 AM   #2
Veteran Member
Toshi's Avatar

Join Date: Sep 2006
Location: San Francisco, CA
Posts: 431
Fixed the title for you.

I don't have the lens but I've read reports of it being a bit soft wide open. Hopefully someone who has it can put up some samples. I'm kind of interested in this lens as well. How do you find the AF? Is it pretty quick?
05-07-2009, 03:57 AM   #3
Inactive Account




Join Date: Jun 2007
Posts: 31
Original Poster
The focus is extremely quick, glad Sigma finally pulled their finger out on HSM for Pentax. Shame I have the old 10-20 but oh well. The build quality is top notch and the focus and zoom rings are particularly nice. I'll post some pictures when I get a minute.
05-07-2009, 06:16 AM   #4
Veteran Member




Join Date: Mar 2007
Location: Boston, PRofMA
Photos: Albums
Posts: 3,053
have you tried manually focusing? Sometimes wide open the DOF isn't very big so it'll look soft when it's actually BF/FF...

05-07-2009, 07:26 AM   #5
Pentaxian
Mike.P's Avatar

Join Date: Mar 2008
Location: South Coast .. UK
Photos: Gallery
Posts: 1,773
A quick test shot taken with my MKI 70-200mm at f2.8 for you to compare.

No cropping.



100% Crop

05-07-2009, 11:47 AM   #6
Inactive Account




Join Date: Jun 2007
Posts: 31
Original Poster
Thanks for the quick replies.

I did read about FF issues with this lens but I'm pretty certain this isn't the case, if anything there is a minute amount of BF. Thanks for the sample pics, I haven't done anything scientific yet (away with work ) but I am seriously starting to think I have a bogus one. I have to stop right down to get anything decent out of it. I'll do some mirror up, SR off tripod shots of a ruler outside or something and get some second opinions before I take it back. My local dealer though very helpful is somewhat sceptical about this sort of thing...
05-07-2009, 12:06 PM   #7
Forum Member
lunelson's Avatar

Join Date: Sep 2007
Location: Missouri
Posts: 80
Mine is currently in for service because it was front focusing. When focus was correct, images were very sharp though, even at f/2.8. The major problem at f/2.8 with mine is not sharpness but lots of CA. I'd say to double-check your focus and be sure it's not causing the problem.
05-07-2009, 06:54 PM   #8
Veteran Member
palmor's Avatar

Join Date: Dec 2006
Location: North of Boston, MA
Posts: 798
I bought the lens and then returned it because I was unhappy with the results compared to my old non-DG version I used to have. One of the things I found (which was later confirmed after reading the review at dpreview) is that it can misfocus as close distances. So when I thought mine was soft I did some test charts that came out REALLY bad.. but when I took shots a little further away everything looked decent.

Back to your original question.. I did find it soft wide open compared to the old version.


John

05-08-2009, 12:48 AM   #9
Inactive Account




Join Date: Jun 2007
Posts: 31
Original Poster
Thanks for the replies. Think I will be in the market for a 200mm 2.8 or 60-250 if my tests confirm my suspicions but I'll post pics and get some opinions first.
05-08-2009, 01:22 AM   #10
Pentaxian
Mike.P's Avatar

Join Date: Mar 2008
Location: South Coast .. UK
Photos: Gallery
Posts: 1,773
QuoteOriginally posted by MrMuz Quote
Thanks for the replies. Think I will be in the market for a 200mm 2.8 or 60-250 if my tests confirm my suspicions
Although I am quite happy with my 70-200mm MKI I have the 60-250mm coming today as it seems a better focal length for me even if it is a bit slower.
05-08-2009, 07:43 AM   #11
Inactive Account




Join Date: Jun 2007
Posts: 31
Original Poster
My significant other would have kittens if I didn't get rid of one before buying another.. not so close together anyway.
05-08-2009, 09:11 AM   #12
Pentaxian
Mike.P's Avatar

Join Date: Mar 2008
Location: South Coast .. UK
Photos: Gallery
Posts: 1,773
QuoteOriginally posted by MrMuz Quote
My significant other would have kittens if I didn't get rid of one before buying another.. not so close together anyway.

Do what I did ... just don't tell her
05-10-2009, 09:55 AM   #13
Inactive Account




Join Date: Jun 2007
Posts: 31
Original Poster
test shot

Right. This shot is 2.8 mounted on my tripod with the mirror up and SR off...



I'm new to this posting photos malarky so please have some patience!

Last edited by MrMuz; 05-10-2009 at 10:00 AM.
05-10-2009, 01:31 PM   #14
Inactive Account




Join Date: Jun 2007
Posts: 31
Original Poster
don't know why that link won't show up... here it is

Picasa Web Albums - Marcel
05-10-2009, 01:40 PM   #15
Pentaxian
Mike.P's Avatar

Join Date: Mar 2008
Location: South Coast .. UK
Photos: Gallery
Posts: 1,773
I dont think the lighting helps your shot at all but if that was my lens I would be taking it back to where I bought it from asap.
The shot I posted for you to comapre with wasnt even on a tripod but handheld.
There you go, displayed on the forum

Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
bit, dg macro hsm, f2.8 ex dg, k-mount, lens, macro hsm ii, pentax lens, sigma 70-200mm f2.8, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
People Sigma 70-200mm (non DG, non macro, non HSM) Just12hvFun Post Your Photos! 7 04-17-2010 10:49 PM
Considering the Sigma 70-200mm 70-200 f/2.8 EX DG MACRO HSM II sbluems Pentax SLR Lens Discussion 7 03-22-2010 10:15 AM
For Sale - Sold: Sigma 70-200mm 2.8 HSM II Macro ivoire Sold Items 3 01-04-2010 09:23 PM
Sigma 70-200mm F2.8 EX DG Macro HSM II on K10D rwheeler Pentax DSLR Discussion 10 12-08-2008 06:11 AM



All times are GMT -7. The time now is 01:05 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top