canon rumors FORUM

Rumors => Third Party Manufacturers => Topic started by: preppyak on April 17, 2013, 07:27:54 PM

Title: Sigma 18-35 f/1.8 DC?
Post by: preppyak on April 17, 2013, 07:27:54 PM
May be fake, but, the rumored specs are thus. I hope it's true, because Sigma has really been pushing things forward lately

    Designed for APS-C based DSLR cameras
    Ultrasonic autofocus (HSM)
    9 aperture blades
    Type A (Art), which guarantees quality materials, metal bayonet
    Filter size: 72mm
    Minimum aperture: f/16
    Lens construction: 17 elements in 12 groups
    The maximum magnification ratio: 0.23x
    Weight: 810 grams, length: 121mm
    Angle of view: 76.5 - 44.2°
    Internal zoom and focusing
    Minimal focusing distance: 28cm

http://photorumors.com/2013/04/17/sigma-18-35mm-f1-8-dc-hsm-lens-leaked/ (http://photorumors.com/2013/04/17/sigma-18-35mm-f1-8-dc-hsm-lens-leaked/)

Title: Re: Sigma 18-35 f/1.8 DC?
Post by: jcoz on April 17, 2013, 08:33:39 PM
Lighter and smaller than the 24-70 2.8...

http://petapixel.com/2013/04/17/leaked-photos-appear-to-show-a-beastly-sigma-18-35mm-f1-8-lens/ (http://petapixel.com/2013/04/17/leaked-photos-appear-to-show-a-beastly-sigma-18-35mm-f1-8-lens/)
Title: Re: Sigma 18-35 f/1.8 DC?
Post by: lonelywhitelights on April 18, 2013, 01:11:42 AM
Sigma have confirmed that the lens is real, it looks fantastic. If only I still had my 7D

http://fstoppers.com/sigma-confirms-rumors-the-18-35mm-f1-8-is-the-real-deal (http://fstoppers.com/sigma-confirms-rumors-the-18-35mm-f1-8-is-the-real-deal)
Title: Re: Sigma 18-35 f/1.8 DC?
Post by: SpartanII on April 18, 2013, 01:56:22 AM
I think I'll stay aps-c a bit longer than planned. Certainly this should put pressure on Canon to become more innovative in the lens arena. Even more considering Sigma's success with their new 35mm f/1.4.

Title: Re: Sigma 18-35 f/1.8 DC?
Post by: Albi86 on April 18, 2013, 02:34:54 AM
Looks like the ultimate travel lens! At 35mm it will also do for a decent portrait lens on APS-C!

I'm becoming more and more a Sigma fanboy :P
Title: Re: Sigma 18-35 f/1.8 DC?
Post by: xps on April 18, 2013, 02:57:13 AM

@ dpreview.com:

http://www.dpreview.com/news/2013/04/18/Sigma-announces-worlds-first-F1-8-constant-aperture-zoom-lens (http://www.dpreview.com/news/2013/04/18/Sigma-announces-worlds-first-F1-8-constant-aperture-zoom-lens)
Title: Re: Sigma 18-35 f/1.8 DC?
Post by: xps on April 18, 2013, 02:59:10 AM
Looks like the ultimate travel lens! At 35mm it will also do for a decent portrait lens on APS-C!

I'm becoming more and more a Sigma fanboy :P

+1 if: the IQ is ok & the price not on Canons pricing orientated
Title: Re: Sigma 18-35 f/1.8 DC?
Post by: that1guyy on April 18, 2013, 03:41:13 AM
GEEZUS I didn't even know that 1.8 on a zoom lens was possible. This is incredible. Good job Sigma.
Title: Re: Sigma 18-35 f/1.8 DC?
Post by: Albi86 on April 18, 2013, 04:11:01 AM
Looks like the ultimate travel lens! At 35mm it will also do for a decent portrait lens on APS-C!

I'm becoming more and more a Sigma fanboy :P

+1 if: the IQ is ok & the price not on Canons pricing orientated

Don't expect it to be cheap. It's a unique lens, and Sigma will take its toll for it. Also, it seems that they didn't spare on special glass and on glass in general (810g!).
Title: Re: Sigma 18-35 f/1.8 DC?
Post by: Rienzphotoz on April 18, 2013, 04:18:29 AM
Holy 5h!t ... f/1.8 on a zoom lens? ... if its real, that'd be freakin AWESOME!
Title: Re: Sigma 18-35 f/1.8 DC?
Post by: Albi86 on April 18, 2013, 04:19:15 AM
Holy 5h!t ... f/1.8 on a zoom lens? ... if its real, that'd be freakin AWESOME!

It is real, it's been officially announced ;)
Title: Re: Sigma 18-35 f/1.8 DC?
Post by: funkboy on April 18, 2013, 05:56:18 AM
Judging from the way other ultra-large-aperture zooms are designed (e.g. the Oly 35-100 f/2) I'd guess that the design is basically a 35-70 f/3.5 with a reversed 2x teleconverter at the back.

I imagine that an FF version of this concept would weigh well north of a kilogram (& cost well north of a kilobuck).

Kudos to Sigma for being innovative once again.  Hopefully this will show C & N that there's real demand for more large-aperture lenses.
Title: Re: Sigma 18-35 f/1.8 DC?
Post by: Viggo on April 18, 2013, 07:21:42 AM
Judging from the way other ultra-large-aperture zooms are designed (e.g. the Oly 35-100 f/2) I'd guess that the design is basically a 35-70 f/3.5 with a reversed 2x teleconverter at the back.

I imagine that an FF version of this concept would weigh well north of a kilogram (& cost well north of a kilobuck).

Kudos to Sigma for being innovative once again.  Hopefully this will show C & N that there's real demand for more large-aperture lenses.

I've said this before and I'll say again, do we really mind a 1.4 kg lens that covers 24-70 at f1.8? We carry the 70-200 with that weight with no issues, so why not a 24-70?
Title: Re: Sigma 18-35 f/1.8 DC?
Post by: Albi86 on April 18, 2013, 07:36:57 AM
Judging from the way other ultra-large-aperture zooms are designed (e.g. the Oly 35-100 f/2) I'd guess that the design is basically a 35-70 f/3.5 with a reversed 2x teleconverter at the back.

I imagine that an FF version of this concept would weigh well north of a kilogram (& cost well north of a kilobuck).

Kudos to Sigma for being innovative once again.  Hopefully this will show C & N that there's real demand for more large-aperture lenses.

I've said this before and I'll say again, do we really mind a 1.4 kg lens that covers 24-70 at f1.8? We carry the 70-200 with that weight with no issues, so why not a 24-70?

I think there would be problems in doing a sharp lens with those features. If you look at the MTF charts for this Sigma it's clear that border performance suffers quite a bit wide open - and it's only a 15 MP APSC.
Title: Re: Sigma 18-35 f/1.8 DC?
Post by: infared on April 18, 2013, 07:44:51 AM
Lighter and smaller than the 24-70 2.8...

http://petapixel.com/2013/04/17/leaked-photos-appear-to-show-a-beastly-sigma-18-35mm-f1-8-lens/ (http://petapixel.com/2013/04/17/leaked-photos-appear-to-show-a-beastly-sigma-18-35mm-f1-8-lens/)

Good size comparison to give you an idea of size and weight with something you might be familiar with, but not a fair lens comparison...the Canon is for FF cameras..not just APS-C.
Still... A very exciting lens!   I have the new 35mm f/1.4 and it ROCKS!
Can't use this one though as I am a FF user...but I hope the specs are incredible....I want the whole Art Line to be fantastic!
Title: Re: Sigma 18-35 f/1.8 DC?
Post by: bchernicoff on April 18, 2013, 08:47:17 AM
Quick someone gripe about the lack of OS!  ;D I kid.

Seriously though, great job Sigma! Love my trio of Sigma 1.4 primes!
Title: Re: Sigma 18-35 f/1.8 DC?
Post by: pierceography on April 18, 2013, 09:13:58 AM
I'm not gonna get too excited for this until we see actual photos and MTF charts.

And it being for crop bodies only is a huge disappointment.  I get that FF lenses are more difficult to engineer, and this is a good start... but I would have loved for this to be a FF lens.

But regardless, kudos to Sigma.  They're clearly stepping their game up of late.