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Archive 2013 · OT - New Sigma 18-135 F1.8 makes 7D tempting :)
  
 
mjoshi
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p.1 #1 · p.1 #1 · OT - New Sigma 18-135 F1.8 makes 7D tempting :)


If this lens is as good as 35F1.4 from Siggy then this makes 7D looks very tempting at $799 price point.

http://www.dpreview.com/news/2013/06/14/Sigma-gives-price-and-availability-for-18-35mm-f1p8-DC-HSM



Jun 14, 2013 at 05:36 PM
david1234
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p.1 #2 · p.1 #2 · OT - New Sigma 18-135 F1.8 makes 7D tempting :)


18-35 not 135!


Jun 14, 2013 at 06:48 PM
D. Diggler
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p.1 #3 · p.1 #3 · OT - New Sigma 18-135 F1.8 makes 7D tempting :)


david1234 wrote:
18-35 not 135


That's about 28 to 50 in full-frame equivalent.



Jun 14, 2013 at 07:52 PM
Ghost
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p.1 #4 · p.1 #4 · OT - New Sigma 18-135 F1.8 makes 7D tempting :)


I have to admit I've not seen any modern AF zoom lens with an aperture greater than f2.8.

This is a first for me. Sigma's hitting its stride lately.



Jun 14, 2013 at 08:16 PM
brett maxwell
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p.1 #5 · p.1 #5 · OT - New Sigma 18-135 F1.8 makes 7D tempting :)


If you compare it to full frame in both focal length and DOF, it's pretty much a 28-50mm f2.8.

Why is it so appealing? For cost purposes?

The only reason I'd own a camera with a sensor smaller than 24x36 is in order to have a smaller/lighter combination, like an X100S. With a 7D it's actually heavier than a 6D with 24-70L II, and only a few grams lighter than a 5DIII with 24-70L II.





Jun 15, 2013 at 03:46 AM
mjoshi
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p.1 #6 · p.1 #6 · OT - New Sigma 18-135 F1.8 makes 7D tempting :)


brett maxwell wrote:
If you compare it to full frame in both focal length and DOF, it's pretty much a 28-50mm f2.8.

Why is it so appealing? For cost purposes?

The only reason I'd own a camera with a sensor smaller than 24x36 is in order to have a smaller/lighter combination, like an X100S. With a 7D it's actually heavier than a 6D with 24-70L II, and only a few grams lighter than a 5DIII with 24-70L II.



But 7D has better focusing compared to 6D & Sigma is lately hitting the mark when it comes to lens quality. You can get this lens with 7D for the price of 24-70L II.



Jun 15, 2013 at 12:51 PM
derbarrett
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p.1 #7 · p.1 #7 · OT - New Sigma 18-135 F1.8 makes 7D tempting :)


brett maxwell wrote:
If you compare it to full frame in both focal length and DOF, it's pretty much a 28-50mm f2.8.

Why is it so appealing? For cost purposes?



I think the DOF comes secondary to the fact that you get 1 1/3 stops of additional light in a zoom lens!!



Jun 15, 2013 at 03:09 PM
NathanHamler
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p.1 #8 · p.1 #8 · OT - New Sigma 18-135 F1.8 makes 7D tempting :)


I just "switched" (still have 2 DX bodies) to FX, and honestly, this 18-35 sigma doesn't do a thing for me, or make me wish that i hadn't made the jump....DX bodies are STILL DX bodies, even when you put a super fast lens on it.....28-50 isn't really a great range IMO....i just dont see it making me wanna stay...the benefits of FX are far more than just shallower DOF.....


Jun 15, 2013 at 06:27 PM
 

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D. Diggler
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p.1 #9 · p.1 #9 · OT - New Sigma 18-135 F1.8 makes 7D tempting :)


brett maxwell wrote:
The only reason I'd own a camera with a sensor smaller than 24x36 is in order to have a smaller/lighter combination


I just added a new crop sensor camera to my toolbox for the times I want deeper depth of field.
Size of the camera wasn't a consideration at all in the purchasing decision. I also have other crop sensor cameras I use when I want the added reach.

Curious to see what Canon will offer when they put out the 70D and 7DII.



Jun 15, 2013 at 08:27 PM
form
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p.1 #10 · p.1 #10 · OT - New Sigma 18-135 F1.8 makes 7D tempting :)


Sigma may be hitting the mark for lens sharpness lately, but the AF is almost definitely not much better than before.


Jun 15, 2013 at 08:47 PM
Mykal
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p.1 #11 · p.1 #11 · OT - New Sigma 18-135 F1.8 makes 7D tempting :)


The AF on the sigma 35 1.4 is definitely better than the AF on the Nikon 35 1.4.


Jun 16, 2013 at 05:54 PM
playerofwar
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p.1 #12 · p.1 #12 · OT - New Sigma 18-135 F1.8 makes 7D tempting :)


Mykal wrote:
The AF on the sigma 35 1.4 is definitely better than the AF on the Nikon 35 1.4.

And better than the Canon and certainly the Zeiss .
120-300 autofocus is also stunning. Almost as good as the 70-200 2.8 vr2, and that means a lot!



Jun 16, 2013 at 06:13 PM
brett maxwell
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p.1 #13 · p.1 #13 · OT - New Sigma 18-135 F1.8 makes 7D tempting :)


derbarrett wrote:
I think the DOF comes secondary to the fact that you get 1 1/3 stops of additional light in a zoom lens!!


But it's not that simple, full frame captures about 1.3 stops more total light for the same aperture and therefore the same sensor generation and technology the full frame will have high ISO performance 1.3 stops better than crop. So it's all moot.

In fact, f1.8 can be restrictive in bright daylight, and can require you to carry NDs to get the same DOF as a full frame at f2.8.



D. Diggler wrote:
I just added a new crop sensor camera to my toolbox for the times I want deeper depth of field.
Size of the camera wasn't a consideration at all in the purchasing decision. I also have other crop sensor cameras I use when I want the added reach.


You can get the same DOF and image quality by stopping down another 1.3 stops and upping the ISO 1.3 stops on a full frame. Unless you're already maxing out the aperture at f16, f22, etc, I don't see the point. "Reach" is totally valid, as 24mp on DX does get more pixels on a distant subject than 36mp on FX, not a priority for me, but understandable.



Jun 17, 2013 at 05:27 PM
D. Diggler
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p.1 #14 · p.1 #14 · OT - New Sigma 18-135 F1.8 makes 7D tempting :)


brett maxwell wrote:
You can get the same DOF and image quality by stopping down another 1.3 stops and upping the ISO 1.3 stops on a full frame. Unless you're already maxing out the aperture at f16, f22, etc, I don't see the point.


In my case, I don't want to stop down any further; I'm shooting at f/8 to get the maximum resolution across the frame. Stopping down further with a full-frame cuts back on resolution due to diffraction taking hold.



Jun 17, 2013 at 11:10 PM
brett maxwell
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p.1 #15 · p.1 #15 · OT - New Sigma 18-135 F1.8 makes 7D tempting :)


D. Diggler wrote:
In my case, I don't want to stop down any further; I'm shooting at f/8 to get the maximum resolution across the frame. Stopping down further with a full-frame cuts back on resolution due to diffraction taking hold.


but the same problem exists, you'll encounter diffraction limiting at 1.3 stops larger aperture on DX versus FX, so if you're seeing diffraction at f9 on FX, you'll see the same amount at f5.6 on DX.



Jun 17, 2013 at 11:16 PM





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