Sigma 24-70 2.8 LENS TEST (2)

[spencer]

OK, I have attached two more images as per previous post.

To recap, I have a sigma 24-70 which I think is to soft.

Image 1 was taken with a Canon 55-200mm4.6-5.6
f4.5, ISO 100, 1/160.
http://i149.photobucket.com/albums/s48/spencer_100/bike1.jpg?t=1188139743

image 2 was taken with the Sigma 24-70mm 2.8 EX DG macro.
f2.8, ISO 100, 1/320.
http://i149.photobucket.com/albums/s48/spencer_100/bike2.jpg?t=1188139800

Thanks Spence

[Joe T]

I assume the same processing on both?

2 defo looks softer to me. More CA too.

Could you retake the 2nd image at f4 and 1/160th for better comparability?

[Moos3h]

The 24-70 is a grand lens, but can be a touch soft in certain instances - I've found that Wide Angle does end up with softer images than normal.

Yours does look soft there, but I'm not sure it's a 100% fair fight there.

Try taking a photo of something with clearer defined lines? I use a book or similar sometimes, to help judge.

When shooting at f2.8, don't forget that your DOF is going to be minimal, if you miss the focus point, even slightly, then everything can look soft. Are you autofocusing or using manual focus? Have you made sure the MF clutch is disengaged if using AF?

Cheers,
James

[Slapo]

I would suggest changing levels so that brightness of these two would be about the same, it's obviously not here.

[spencer]

As requested Joe.
F4 1/160.

http://i149.photobucket.com/albums/s48/spencer_100/bike3.jpg?t=1188142025

Hope this helps

Oh and there was no processing accept to crop.
Spence

[Moos3h]

Hi Spence,

That shot simply looks out of focus, are you 100% bang on that you were correctly focused?

Might be worth using a tripod too, just to make sure there's no movement there - there shouldn't be at that speed, but you never know.

Cheers,
James

[sprog]

A dartboard makes a good test piece.

Use a tripod, perpendicular to the board and shoot each lens using the same or similar aperture in aperture priority mode. I can't see how your camera body would let you take that last shot if you were in AF mode, nothing is in focus.

[mho]

If you think its too soft send it back to Sigma let them have a look, or get a replacement from WHE.

[spencer]

Ok this is the last one before it goes back.
(The last one did look out of focus.)

http://i149.photobucket.com/albums/s48/spencer_100/bike4.jpg?t=1188143608


Tripod used on all above shots.

[Marik]

try using a faster shutter speed. I have this lens and it's amazing, infact here's one I took earlier!

http://img86.imageshack.us/img86/61/flybv6.jpg

[mho]

Spencer - Dont froget when uploading images to the Web to convert the colour to sRGB leaving them as AdobeRGB gives you dull, washed out colours.

Marik - Very nice capture.

[spencer]

try using a faster shutter speed. I have this lens and it's amazing, infact here's one I took earlier!

http://img86.imageshack.us/img86/61/flybv6.jpg

Great shot Marik, but I dont think the lens I have would take anything that sharp.:thumbsdown:

Spence

[Marik]

Shame, as someone said. If I doubt, get it replaced! It really is a top drawer lens... if you get a decent one!

[Moos3h]

And here's one of mine with the aforementioned lens.

http://i41.photobucket.com/albums/e256/Moos3h/CRW_0067.jpg

I think there's either some user error here, or you have a faulty lens. Does it get sharper at f8?

Cheers,
James

[spencer]

My new replacement lens arrived yesterday, I sent the faulty one back on Tuesday expecting to wait at least a couple of weeks! A big thumbs up to Warehouse express.:thumbs:

Anyway I've had a quick play tonight.(with the lens)
And it is far sharper than the original lens!!:woot::woot:

Spence

[Moos3h]

Hoorah!

Nice one matey, and well done to WE!

Cheers,
James