PF Holiday Loyal Site Supporter Special | December Pentax Lens Tournament

yygomez · 04-18-2013, 07:00 AM

Looks like it will be a very nice one for street/low light situations, sadly probably not on Pentax mount for now: 18-35mm F1.8 DC HSM | Art | Sigma

tromboads · 04-18-2013, 07:23 AM

so.. it says its for aps-c bodies, but advertises the focal length as 18-35... but then goes on to say its a 27-52 equiv... so will it cover a FF image circle or not? Sigma is confusing.

i83N · 04-18-2013, 07:23 AM

Pleas cheek next time if this news were already written.

**Vantage-Point** · 04-18-2013, 07:27 AM

Wow, they really made it!! Its for real!! This lens if it is any good will definitely be a game changer. I can't wait to see what the pictures look like that are produced from this lens. I really hope they make it in the Pentax mount. Sigma is really trying to be the premiere lens maker in the photography industry!

lytrytyr · 04-18-2013, 07:36 AM

Originally posted by tromboads

so.. it says its for aps-c bodies, but advertises the focal length as 18-35... but then goes on to say its a 27-52 equiv...

That's a standard conversion.
18 mm on APS-C, same angle of view
as 18 x 1.5 = 27 mm on FF.

Or 35 x 1.5 = 52.

Originally posted by tromboads

so will it cover a FF image circle or not?

That remains to be seen when someone can test the lens on a 135 format camera.
But the lens is intended for use on crop format cameras.

tromboads · 04-18-2013, 07:42 AM

oh wait., I'm asleep again. :S

*finds the coffee pot*

Carry on, no stupid questions concerning focal length and field of view here. Nothing to see nothing to see

Hmmm coffee..

causey · 04-18-2013, 07:43 AM

Sigma's on a roll, no doubt about it...

**Digitalis** · 04-18-2013, 08:19 AM

An interesting lens, it covers a useful 27-52mm(35mm equiv.) focal range. Though like most fast zoom lenses it is bound to have some pretty nasty astigmatism.

**K6-III** · 04-18-2013, 01:30 PM

Curious to see how this pans out. Could make a good case for negating the need for full frame (if the price is right).

reeftool · 04-18-2013, 04:24 PM

Originally posted by tromboads

so.. it says its for aps-c bodies, but advertises the focal length as 18-35... but then goes on to say its a 27-52 equiv... so will it cover a FF image circle or not? Sigma is confusing.

Everybody uses the FF 35mm equiv. when describing their lenses, even small P&S cameras. I wonder how many people really understand that spec these days since the vast majority of customers have probably never used a 35mm SLR or a FF DSLR to know what it means.

yygomez · 04-19-2013, 04:11 PM

This Korean Site has Pictures taken with the new lens:Gear for Image :: Sigma ART 18-35mm f1.8 DC Preview

04-18-2013, 07:00 AM	#1
yygomez Senior Member Join Date: Feb 2010 Location: Surfside,FL Photos: Gallery Posts: 155	New Sigma 18-35 F1.8 APS-C Looks like it will be a very nice one for street/low light situations, sadly probably not on Pentax mount for now: 18-35mm F1.8 DC HSM \| Art \| Sigma

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04-18-2013, 07:23 AM	#2
tromboads Veteran Member Join Date: Apr 2012 Location: Sydney Photos: Gallery Posts: 1,182	so.. it says its for aps-c bodies, but advertises the focal length as 18-35... but then goes on to say its a 27-52 equiv... so will it cover a FF image circle or not? Sigma is confusing.

04-18-2013, 07:23 AM	#3
i83N Pentaxian Join Date: Mar 2009 Location: Lithuania Photos: Gallery Posts: 1,203	Pleas cheek next time if this news were already written.

04-18-2013, 07:27 AM	#4
Vantage-Point Loyal Site Supporter Join Date: Oct 2010 Location: New York Posts: 516	Wow, they really made it!! Its for real!! This lens if it is any good will definitely be a game changer. I can't wait to see what the pictures look like that are produced from this lens. I really hope they make it in the Pentax mount. Sigma is really trying to be the premiere lens maker in the photography industry!

04-18-2013, 07:36 AM	#5
lytrytyr Pentaxian Join Date: Nov 2011 Photos: Gallery \| Albums Posts: 4,125	Originally posted by tromboads so.. it says its for aps-c bodies, but advertises the focal length as 18-35... but then goes on to say its a 27-52 equiv... That's a standard conversion. 18 mm on APS-C, same angle of view as 18 x 1.5 = 27 mm on FF. Or 35 x 1.5 = 52. Originally posted by tromboads so will it cover a FF image circle or not? That remains to be seen when someone can test the lens on a 135 format camera. But the lens is intended for use on crop format cameras.

04-18-2013, 07:42 AM	#6
tromboads Veteran Member Join Date: Apr 2012 Location: Sydney Photos: Gallery Posts: 1,182	oh wait., I'm asleep again. :S finds the coffee pot Carry on, no stupid questions concerning focal length and field of view here. Nothing to see nothing to see Hmmm coffee..

04-18-2013, 07:43 AM	#7
causey Veteran Member Join Date: Feb 2009 Location: Arlington, VA Photos: Albums Posts: 3,758	Sigma's on a roll, no doubt about it...

04-18-2013, 08:19 AM	#8
Digitalis Site Supporter Join Date: Mar 2009 Location: Adelaide. Posts: 10,151	An interesting lens, it covers a useful 27-52mm(35mm equiv.) focal range. Though like most fast zoom lenses it is bound to have some pretty nasty astigmatism.

04-18-2013, 01:30 PM	#9
K6-III Site Supporter Join Date: Apr 2010 Location: Montreal Posts: 222	Curious to see how this pans out. Could make a good case for negating the need for full frame (if the price is right).

04-18-2013, 04:24 PM	#10
reeftool Pentaxian Join Date: Dec 2007 Location: Upstate New York Photos: Gallery \| Albums Posts: 8,921	Originally posted by tromboads so.. it says its for aps-c bodies, but advertises the focal length as 18-35... but then goes on to say its a 27-52 equiv... so will it cover a FF image circle or not? Sigma is confusing. Everybody uses the FF 35mm equiv. when describing their lenses, even small P&S cameras. I wonder how many people really understand that spec these days since the vast majority of customers have probably never used a 35mm SLR or a FF DSLR to know what it means.

04-19-2013, 04:11 PM	#11
yygomez Senior Member Join Date: Feb 2010 Location: Surfside,FL Photos: Gallery Posts: 155 Original Poster	This Korean Site has Pictures taken with the new lens:Gear for Image :: Sigma ART 18-35mm f1.8 DC Preview

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New Sigma 18-35 F1.8 APS-C

PF Holiday Loyal Site Supporter Special | December Pentax Lens Tournament