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FORUMS Sample Photo Archives Lens Sample Photo Archive 
Thread started 04 Dec 2009 (Friday) 13:11
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Sigma 17-70mm F2.8-4 DC Macro OS

 
ian_socool
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Feb 23, 2013 13:07 |  #931

mnphotos wrote in post #15643807 (external link)
I also have both of those lenses and for sure the plastic fantastic (50mm f1.8) would go long before I got rid of the Sigma 30mm. I love using the Sigma for indoor family gatherings.

I love my 50 for portraits, but found myself on a hospital bed trying to back up to take some maternity portraits. I promised myself to get a wider prime, and I think this is it.


70D, 70D, SL1, Tokina 11-16 F/2.8, Σ30mm 1.4, 40mm 2.8 Pancake Σ70mm 2.8 EX DG Macro, Canon 17-55 2.8 IS, Σ85 1.4, Σ50-150mm f/2.8 EX DC OS HSM APO, Godox AD 200 X's 2, 430EX II X's 2, Yongnuo YN-560II X's 2, Cowboy Studio wireless flash triggers X4.Ian_socool FlickR (external link) Facebook fanpage (external link) http://ianlynphotograp​hy.com (external link)

  
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Marco315
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Feb 24, 2013 15:48 |  #932

Well I took about 70 pics today with this lens and wouldn't post a one to show you so that leads me to believe I either have a bad copy or I don't know what the h I'm doing. But even on auto you would think one would have turned out.......


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mnphotos
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Feb 24, 2013 16:24 |  #933

Marco315 wrote in post #15647499 (external link)
Well I took about 70 pics today with this lens and wouldn't post a one to show you so that leads me to believe I either have a bad copy or I don't know what the h I'm doing. But even on auto you would think one would have turned out.......

Don't get discouraged yet. Please post a couple of pictures, it's the only way we can try and help you.




  
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Marco315
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Feb 24, 2013 17:14 |  #934

mnphotos wrote in post #15647646 (external link)
Don't get discouraged yet. Please post a couple of pictures, it's the only way we can try and help you.

I think I already deleted them but will look to see if I have a few. Thanks
Oh, let me add my 1.8 85mm was much sharper.


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ian_socool
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Feb 24, 2013 19:01 |  #935

It is totally possible that it needs to be calibrated by Sigma. I took some photos last night at what is supposed to be a sore spot on the Sigma, 70mm @4.0. My pics are sharp as a knife now. I know it may seem like a lot to do just for a lens, but I know it was worth the drive for me. It is very comparable to a Canon 24-70 non IS to me.


70D, 70D, SL1, Tokina 11-16 F/2.8, Σ30mm 1.4, 40mm 2.8 Pancake Σ70mm 2.8 EX DG Macro, Canon 17-55 2.8 IS, Σ85 1.4, Σ50-150mm f/2.8 EX DC OS HSM APO, Godox AD 200 X's 2, 430EX II X's 2, Yongnuo YN-560II X's 2, Cowboy Studio wireless flash triggers X4.Ian_socool FlickR (external link) Facebook fanpage (external link) http://ianlynphotograp​hy.com (external link)

  
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Marco315
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Feb 24, 2013 19:10 |  #936

ian_socool wrote in post #15648099 (external link)
It is totally possible that it needs to be calibrated by Sigma. I took some photos last night at what is supposed to be a sore spot on the Sigma, 70mm @4.0. My pics are sharp as a knife now. I know it may seem like a lot to do just for a lens, but I know it was worth the drive for me. It is very comparable to a Canon 24-70 non IS to me.

May be that, I can't believe it no camera store within 2.5 hours or more away but I will give them a call and probably send it off.


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Marco315
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Feb 24, 2013 19:29 |  #937

mnphotos wrote in post #15647646 (external link)
Don't get discouraged yet. Please post a couple of pictures, it's the only way we can try and help you.

I found a couple I hadn't deleted oohhh I hate to post them here but I will. One is my backyard squirrel feeder ha, my baby and then a floral shot. The rest were way worse....

I took those shots down and am putting up a link to my test gallery because they were not quality to be on here. To view the test shots and offer help click on link. Thanks much!
http://jensgalleries.s​mugmug.com/Other/17-70-testshots/ (external link)


500 px (external link)

  
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kfreels
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Feb 24, 2013 19:52 |  #938

The first looks fine here. The second looks soft but also looks underexposed and there may be some subject or camera shake. What was the shutter speed on it? The last looks so-so. The high contrast causes color clipping and the DR of the scene is out of line with the camera's capabilities. So you have a good portion of your scene in shadow underexposed and another good chunk blown out and clipped. There are some green leaf areas that are properly exposed and they look alright to me.

The lens isn't going to be as good as your prime. That's just the nature of zooms. Also, f4 is wide open at longer focal lengths so you need to stop down for maximum sharpness. This is always the case with any lens. Some are sharper than others wide open but we're not talking about a $2000 lens here.

Try taking some more shots in some more controlled environments. Use a flash to get proper exposure throughout the image. Bump up the shutter speeds to eliminate subject movement, etc. If you still have problems it may be worth sending to Sigma but you also may want to post some full size RAW images for us to look at before going through the trouble just to rule out the possibility of the improper expectations.

Since you are by default going to get shots a little softer than your prime, one thing you may want to look at is ways to maximize sharpness in post. Just sharpening can make a pretty ugly image, but if you know how to properly sharpen it will take you a lot further. Check out the book "Real World Image Sharpening with Adobe Photoshop, Camera Raw, and Lightroom (2nd Edition)". That should help as well.


I am serious....and don't call me Shirley.
Canon 7D and a bunch of other stuff

  
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Marco315
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Feb 24, 2013 19:54 |  #939

kfreels wrote in post #15648248 (external link)
The first looks fine here. The second looks soft but also looks underexposed and there may be some subject or camera shake. What was the shutter speed on it? The last looks so-so. The high contrast causes color clipping and the DR of the scene is out of line with the camera's capabilities. So you have a good portion of your scene in shadow underexposed and another good chunk blown out and clipped. There are some green leaf areas that are properly exposed and they look alright to me.

The lens isn't going to be as good as your prime. That's just the nature of zooms. Also, f4 is wide open at longer focal lengths so you need to stop down for maximum sharpness. This is always the case with any lens. Some are sharper than others wide open but we're not talking about a $2000 lens here.

Try taking some more shots in some more controlled environments. Use a flash to get proper exposure throughout the image. Bump up the shutter speeds to eliminate subject movement, etc. If you still have problems it may be worth sending to Sigma but you also may want to post some full size RAW images for us to look at before going through the trouble just to rule out the possibility of the improper expectations.

Since you are by default going to get shots a little softer than your prime, one thing you may want to look at is ways to maximize sharpness in post. Just sharpening can make a pretty ugly image, but if you know how to properly sharpen it will take you a lot further. Check out the book "Real World Image Sharpening with Adobe Photoshop, Camera Raw, and Lightroom (2nd Edition)". That should help as well.

Thanks much for the help noting it.


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Marco315
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Feb 24, 2013 20:50 |  #940

Okay, went back took some indoors shots in manual huge difference nice sharp pics. I would say the problem from earlier today was nervousness from a new lens. TY


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mnphotos
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Feb 25, 2013 05:52 |  #941

Marco315 wrote in post #15648432 (external link)
Okay, went back took some indoors shots in manual huge difference nice sharp pics. I would say the problem from earlier today was nervousness from a new lens. TY

This is the focus test I did on my lens. You might want to try it and see what the results are. Just a suggestion. ;)

https://photography-on-the.net/forum/showthre​ad.php?t=750736




  
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Marco315
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Feb 25, 2013 09:50 |  #942

mnphotos wrote in post #15649289 (external link)
This is the focus test I did on my lens. You might want to try it and see what the results are. Just a suggestion. ;)

https://photography-on-the.net/forum/showthre​ad.php?t=750736

thanks will def give that a go as mentioned above I set up a test gallery in the link below rather than posting them here.

http://jensgalleries.s​mugmug.com/Other/17-70-testshots/ (external link)


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mnphotos
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Feb 25, 2013 11:41 |  #943

Marco315 wrote in post #15649855 (external link)
thanks will def give that a go as mentioned above I set up a test gallery in the link below rather than posting them here.

http://jensgalleries.s​mugmug.com/Other/17-70-testshots/ (external link)

Some of those pictures look pretty nice. Keep at it. :)




  
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Marco315
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Feb 25, 2013 12:13 |  #944

mnphotos wrote in post #15650173 (external link)
Some of those pictures look pretty nice. Keep at it. :)

That's encouraging shooting indoor shots today it is flooding here but they are getting better and better nice lens learning the manual mode sure helps.


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JDeluis
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Mar 08, 2013 02:27 as a reply to  @ Marco315's post |  #945

Really enjoying this lens. Too bad people aren't posting more pictures. :(

IMAGE: http://farm9.staticflickr.com/8250/8537887409_17253d8062_c.jpg
IMAGE LINK: http://www.flickr.com/​photos/jdeluis/8537887​409/  (external link)
Baby Aiden - 6 Months (external link) by JDeluis (external link), on Flickr

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Sigma 17-70mm F2.8-4 DC Macro OS
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