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Author Topic: Official: Sigma 24-105mm f/4 DG OS  (Read 24476 times)

LetTheRightLensIn

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Re: Official: Sigma 24-105mm f/4 DG OS
« Reply #60 on: October 15, 2013, 02:26:18 PM »
honestly, the mtf doesn't impress me at all. on the other hand, based on what i've seen from sigma with their latest releases, it should be much better than any equivalents canon or nikon has to offer. my guess the price will be around 750-850$ and i really hope it will perform better than what the MTF shows, otherwise, whats the point? if it does i sure see myself getting myself a copy

one thing i dont understand though, is the A rating... a C would make much more sense

The Sigma MTF *is* better than the Canon MTF for the same zoom and the Sigma lens has less distortion. Vignetting - have to wait and see. Will be interesting to read the DxO review of it, that's for sure!

Not better than the 24-70 f/4 IS MTF (again not that you can really compare these MTF anyway between brands).

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Re: Official: Sigma 24-105mm f/4 DG OS
« Reply #60 on: October 15, 2013, 02:26:18 PM »

LetTheRightLensIn

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Re: 82mm
« Reply #61 on: October 15, 2013, 02:28:48 PM »
The Zeiss Otus 55mm f1.4 has an 82mm filter size too.
... I believe the Otus 55/1.4 is a 77mm.

True, but the point he made still stands. A typical 50-55mm f/1.4 has a 58mm filter size. 77mm is huge for a 55mm f/1.4.

It seems lots of these lenses that do better at the edges than before are having extra larger fronts (70-300L, 24-70 II, 55mm Otus, etc.).

mackguyver

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Re: 82mm
« Reply #62 on: October 15, 2013, 02:41:12 PM »
True, but the point he made still stands. A typical 50-55mm f/1.4 has a 58mm filter size. 77mm is huge for a 55mm f/1.4.

It seems lots of these lenses that do better at the edges than before are having extra larger fronts (70-300L, 24-70 II, 55mm Otus, etc.).
When the Zeiss 55 was first announced, many people believed that the only way to create superior IQ from the lens was if it had a huge image circle and only used the central (best) part.  I'm guessing that is a realistic possibility and might be what many of the "oversized" 77 / 82mm lenses are doing.
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Sporgon

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Re: 82mm
« Reply #63 on: October 15, 2013, 03:05:24 PM »

When the Zeiss 55 was first announced, many people believed that the only way to create superior IQ from the lens was if it had a huge image circle and only used the central (best) part.  I'm guessing that is a realistic possibility and might be what many of the "oversized" 77 / 82mm lenses are doing.

That doesn't seem to have helped edge of frame on the Sigma 50mm 1.4 though. I believe that has a 77 front end.

Rick

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Re: 82mm
« Reply #64 on: October 15, 2013, 04:00:40 PM »
The Zeiss Otus 55mm f1.4 has an 82mm filter size too.
... I believe the Otus 55/1.4 is a 77mm.
Yep:


The quote "The new 82mm front element was designed to produce sharpness across the entire frame " was copy/pasted directly form the Zeiss website, but I see in the pic the 77mm thread. Can the front element be 82mm while the thread is 77?  Just curious. :)

Jan Jasinski

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Re: Official: Sigma 24-105mm f/4 DG OS
« Reply #65 on: October 15, 2013, 05:34:28 PM »
Lens isn't listed on Sigma's Global site. The links directed to it don't work, and error occurs.
Perhaps they aren't ready to release it?
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dilbert

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Re: Official: Sigma 24-105mm f/4 DG OS
« Reply #66 on: October 15, 2013, 07:54:25 PM »
Lens isn't listed on Sigma's Global site. The links directed to it don't work, and error occurs.
Perhaps they aren't ready to release it?

Given that it didn't appear on dpreview, I think that you're right about that.

But the cat is well and truly out of the bag.
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Re: Official: Sigma 24-105mm f/4 DG OS
« Reply #66 on: October 15, 2013, 07:54:25 PM »

Jibz

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Re: Official: Sigma 24-105mm f/4 DG OS
« Reply #67 on: October 16, 2013, 03:03:15 AM »
Hey,

The lens is now listed on SIGMA website, It's official : http://www.sigma-global.com/en/lenses/cas/product/art/a_24_105_4/
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Valvebounce

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Re: Official: Sigma 24-105mm f/4 DG OS
« Reply #68 on: October 16, 2013, 04:03:19 AM »
Hi folks.
Available TBA.
Price ????

So not much change except it has reappeared on the site?

Cheers Graham.

Hey,

The lens is now listed on SIGMA website, It's official : http://www.sigma-global.com/en/lenses/cas/product/art/a_24_105_4/
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5D, 20D, 24-105, BG-E4, BG-E2N, 17-85, Nifty 50 pre owned. 😀

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Re: Official: Sigma 24-105mm f/4 DG OS
« Reply #68 on: October 16, 2013, 04:03:19 AM »