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Old Apr 30, 2006, 1:45 PM   #1
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Somehow my previous topic on this lens disappeared, so let's try again. I find this lens interesting in this range. There are only few potential candidates for people with APSC and need for wide angle. Even though this lens is not as fast for me it will do in most situations. I cannot either afford or carry the whole bunch of 2.8 super quality pro lenses. One of the reasons I started being existed about digital is the size reduction ... which slowly dissapears again.

Canon 30D, Sigma 10-20, 1/80; f6.3; ISO800:



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Old Apr 30, 2006, 1:46 PM   #2
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Right-Lower corner:
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Old May 1, 2006, 5:56 PM   #3
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Got my Sigma 10-20mm today. Made only dosen pictures and my first impression is positive. I would recommend buying this lens localy due to some bad examples. Maybe that was the case with inital series (2005), but still ...

Lens is built well, quite sharp. Probably not the lens to be used in most of the situation but certainly one to have to cover lower zoom range.

If anybody interested I can post more pictures.
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Old May 1, 2006, 10:14 PM   #4
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GM2006 wrote:
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Even though this lens is not as fast for me it will do in most situations. I cannot either afford or carry the whole bunch of 2.8 super quality pro lenses. One of the reasons I started being existed about digital is the size reduction ...
Do you need the speed (at all)?
-> Think about it... even with the 1.6x, according to 'the rule of thumb', 1/16s is already several stops 'studier' than what a longer lens @ f/2.8 requires :idea:

... Try some slower shutter speeds! :lol: :-) :G
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Old May 2, 2006, 12:50 PM   #5
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I am not sure what are you trying to say ...

Maybe you did not understand what I was saying: I said Simga 10-20 is f4-5.6 and it is ok for most of the situation. With wide lens you can go as low as 1/4 and make a good hand-held shot. Then you have choice of higher ISO (as test shot I've included).

And what 1.6 factor has to do with lens 'speed'? With 1.6 crop factor your lens becoming 'longer' and you would need faster speed comparing to same lens at 35mm camera.

With a little care you can takegood hand-held shots even @ 500mm with shutter bellow 1/500. But maybe not every time ...

So again, it is good to havefaster lens but itbecoming more expensive and heavier.




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Old May 2, 2006, 1:37 PM   #6
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GM2006 wrote:
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... With wide lens you can go as low as 1/4 and make a good hand-held shot.
We're on the same level: 10mm x 1.6 = 16mm -> with 1/16s shutter speed, an f/2.8 lens is not needed as much anymore...




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With a little care you can take good hand-held shots even @ 500mm with shutter bellow 1/500. But maybe not every time ...
I'm with you too - I do this all the time (especially at close distance)
See here: http://www.stevesforums.com/forums/v...mp;forum_id=65

-> IS is for Sissy IMO :lol: :-) :G
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Old May 3, 2006, 12:33 AM   #7
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Thanks NHL. Yeah, IS is for an old guys ... having it you are becoming spoiled and you start to trust it to much. But still, I wouldn't mind having one ... I'll probably get either of Sigma 80-400 or Canon 100-400 both IS version ...

I do not know if you've decided on Sigma 10-20, if not, I can really recommend it. I've never had anything 'smaller' than 28 @ 35mm before and 10-20 gives a lot of new possibilities.

My sample of 10-20 is not always as sharp as Sigma 17-70 which is mine 'main' walkaround lens (for now), but optically 10-20 is a little monster comparing to 17-70 and it is much more difficult to construct. Picture sharpness will depend on the angle and how close the objects are and, of course, f-stop. Using 17-10 my camera is always set to sharpness 3 and with 10-20 it is better if it is set to 5. Difference is really negligible. But, 10-20 has much less fringing than 17-70. As much as I like sometimes I hate having internet and finding myself going to deep into looking for the perfection when, really, it is more important to make a good picture. Lens has to be good (and I am picky) but 5% difference in quality (and 100% difference in price) makes no big deal.

Here are two of the shots I just took. Both are 1/30, f5. ISO 400. First is @ 20 and second at 10mm. This lens is ideal for twilight (say low light) hand helds. Do not need trypod.


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Old May 3, 2006, 12:34 AM   #8
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I wish I can post picture with better resolution; looking at the reduced picture can be very deceiving.
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Old May 3, 2006, 12:42 AM   #9
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Old May 3, 2006, 6:11 AM   #10
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GM2006 wrote:
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... I hate having internet and finding myself going to deep into looking for the perfection when, really, it is more important to make a good picture. Lens has to be good (and I am picky) but 5% difference in quality (and 100% difference in price) makes no big deal.
Again agree 100%, plus this 5% difference can also come from testers error since most comparisons I've observed are in un-controlled condition (such as lighting change from 1 series of shots to another). Most folks are also very unfamiliar with super wides let alone testing them correctly while others desire to pay more because they don't trust their own ability - I do this all the time in sport when buying tennis rackets and ski/boots where what I needed was more practice... Eh but it feels good! :lol: :-) :G




Quote:
Thanks NHL. Yeah, IS is for an old guys ... having it you are becoming spoiled and you start to trust it to much. But still, I wouldn't mind having one ... I'll probably get either of Sigma 80-400 or Canon 100-400 both IS version...
I have the 100-400 just because the Sigma didn't come with HSM - IMO they'are equally fast in AF, but I always wanted the full-time manual overide (never trusted the camera), and without the HSM the 80-400 didn't make it although the extra 80mm at the bottom is quite nice to have!

-> Actually I was even thinking of the 50-500 Bigma over the 80-400 because of the HSM too since IS to me is no big deal and not on my list of priority (Photography is all about lighting mostly and there's just no way to have a wall hanger shooting in the dark with IS!). I rather invest on flashes :roll:
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