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Author Topic: Sigma 18-35 F/1.8 just announced?!  (Read 1759 times)

ahsanford

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Sigma 18-35 F/1.8 just announced?!
« on: April 18, 2013, 02:24:00 AM »

When I saw a rumor listing for an F/1.8 zoom lens, I giggled and assumed it was the hoax du jour, late April fool's, etc.

Now I am not so sure:
http://photorumors.com/2013/04/18/sigma-18-35mm-f1-8-dc-hsm-lens-officially-announced/

And now I am sort of overwhelmed:
http://www.sigma-global.com/en/lenses/cas/product/art/a_18_35_18/

So Sigma has the nerve to make a faster than F/2.8 zoom and they make it for APS-C?!.

Someone help me understand the market target for such a lens.  After all, I thought the people buying high end glass for their APS-C rigs are 7D users buying long primes for birding.  What APS-C users have been lamenting that their 17-55 F/2.8 IS isn't quick enough?  I would argue that as cool as such a new lens might be to use, this can't be a massive gap in the APS-C users' bag, right?

So so so confused.  Help me make sense of this, thx.

- A


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Sigma 18-35 F/1.8 just announced?!
« on: April 18, 2013, 02:24:00 AM »

wickidwombat

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Re: Sigma 18-35 F/1.8 just announced?!
« Reply #1 on: April 18, 2013, 03:52:50 AM »
i had an erection until i read it was for APS-C  :'(
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dr croubie

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Re: Sigma 18-35 F/1.8 just announced?!
« Reply #2 on: April 18, 2013, 04:03:37 AM »
So it's 18-35 f/1.8 for APS-C, making at a FF-equivalent of 29-56 f/2.9
Comparing, say, a 7D + this Sigma 18-35 f/1.8 to an FF, say 5D3 + 24-70 f/2.8, you get a lot more at the long end, and a bit more at the wide end.
Not sure which one would combo will deliver better IQ (especially seeing how good the new 24-70 II is, it'll be hard to beat), but I can tell you which combo is going to be a lot lighter on the wallet...
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Canon-F1

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Re: Sigma 18-35 F/1.8 just announced?!
« Reply #3 on: April 18, 2013, 04:25:29 AM »
MTF looks good.. and it´s a real beauty.
6D, 5D MK2, 7D, 550D... a lot of Glass.

Albi86

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Re: Sigma 18-35 F/1.8 just announced?!
« Reply #4 on: April 18, 2013, 04:48:04 AM »


Someone help me understand the market target for such a lens.  After all, I thought the people buying high end glass for their APS-C rigs are 7D users buying long primes for birding.  What APS-C users have been lamenting that their 17-55 F/2.8 IS isn't quick enough?  I would argue that as cool as such a new lens might be to use, this can't be a massive gap in the APS-C users' bag, right?

So so so confused.  Help me make sense of this, thx.

- A

A lot will depend on the price point and actual IQ of course.

I see it as a travel lens. While there are many good standard zooms on APSC, many times I felt like I needed a fast prime too for portraits and subject isolation. This lens kind of fills that gap - please also note the 28cm MFD.

Malte_P

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Re: Sigma 18-35 F/1.8 just announced?!
« Reply #5 on: April 18, 2013, 05:04:42 AM »
excuse my ignorance.... but why all the world on the net is talking about this lens to be equal to a f2.7 (f2.9) FF lens?

f1.8 is f1.8.... ?

here too:

Quote from: dr croubie
So it's 18-35 f/1.8 for APS-C, making at a FF-equivalent of 29-56 f/2.9

i mean when i put a 50mm f1.8 on FF or APS-C it´s an f1.8 lens.
exposure does not change.
 
« Last Edit: April 18, 2013, 05:12:03 AM by Malte_P »

Albi86

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Re: Sigma 18-35 F/1.8 just announced?!
« Reply #6 on: April 18, 2013, 05:08:12 AM »
excuse my ignorance.... but why all the world on the net is talking about this lens to be equal to a f2.7 (f2.9) FF lens?

f1.8 is f1.8.... ?

here too:

Quote from: dr croubie
So it's 18-35 f/1.8 for APS-C, making at a FF-equivalent of 29-56 f/2.9

i mean when i put a 50mm f1.8 on FF or APS-C it´s an f1.8 lens.

In terms of DoF ;)

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Re: Sigma 18-35 F/1.8 just announced?!
« Reply #6 on: April 18, 2013, 05:08:12 AM »

Malte_P

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Re: Sigma 18-35 F/1.8 just announced?!
« Reply #7 on: April 18, 2013, 05:13:07 AM »
excuse my ignorance.... but why all the world on the net is talking about this lens to be equal to a f2.7 (f2.9) FF lens?

f1.8 is f1.8.... ?

here too:

Quote from: dr croubie
So it's 18-35 f/1.8 for APS-C, making at a FF-equivalent of 29-56 f/2.9

i mean when i put a 50mm f1.8 on FF or APS-C it´s an f1.8 lens.

In terms of DoF ;)

then they have to write that.  ::)
because DOF is not everything.

in terms of speed it´s an f1.8 lens.

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Re: Sigma 18-35 F/1.8 just announced?!
« Reply #7 on: April 18, 2013, 05:13:07 AM »