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01-10-2010, 12:58 AM   #166
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QuoteOriginally posted by Fl_Gulfer Quote
I just took this with my new Sigma 10-20 and I don't think it's very clear.

Click to Enlarge.
Gulfer,
I don't know about clear, but i didn't think the image was in focus. It looked like it was close too focus up close, but those 2 figures down the beach were fuzzy, i thought.

I don't know what focal length you were at, but at low light conditions, my 10-20 has problems focusing near 10mm. and i've read that complaint from a few other users as well. I always use manual focus under those conditions to achieve hyper focus. i think if you dial in 3 or 6 feet you're there. as focal length increases beyond 12 mm, my lens usually again picks up the focus. I was wondering if perhaps that was the problem with this image.

01-10-2010, 01:40 AM   #167
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As Phil said,
it seems that the forground is in the focus but not the rest of the image. I'd blame the AF not the lens.
01-10-2010, 01:44 AM   #168
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...and one to keep things going

Icy dawn
01-10-2010, 10:38 AM   #169
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Gulfer, When especially at 10mm, try shooting the lens at F/8 and simply hyperfocal. Atleast I have found this to be the best starting point for me.

01-10-2010, 11:17 AM   #170
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Wide-angle flash? Diffuse it!

QuoteOriginally posted by jibbonpoint Quote
Great shots. I do have this lens; purchased about six months ago. Has anyone had success indoors with flash? I've the F360z & I can't seem to do any good at all. I've deleted the few attempts I've made.
Can't help you specifically with the 10-20 and flash (but thanks to this thread it is on my wishlist and short-listed!), but for any wide-angle flash work, you really need to use a "dome-type" diffuser. Yes, it limits the distance and power of your flash, but point the thing up with a plastic blob on it and it will light up your wide angle field of view.

Most motorized flashes (like the 360) only go to about 24mm FOV, and their little "plop-up" diffuser panels do jack. Get an Omnibounce or a cheap knock-off of a Gary Fong (google them), or make one out of translucent white tupperware. Looks silly, but does the trick!

To keep more of your flash power going forward (the above plastic diffusers scatter the light 360 degrees), you could also go "turbo-silly" and build one of these: DIY Reflector-Diffuser

Here is a pic of Gooshin (from this very forum) trying my DIY wide-angle bounce diffuser out:
(Not taken with a Sigma 10-20mm!)
01-10-2010, 12:18 PM - 1 Like   #171
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10-20mm at work in Quebec.

1 A College near by


By ramiot, shot with PENTAX K20D at 2009-07-07

2 Old house


By ramiot, shot with PENTAX K20D at 2009-06-22

3 Field in automn


By ramiot at 2009-10-14
01-11-2010, 11:13 AM   #172
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Here we are at 13mm I believe:
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01-11-2010, 11:55 AM   #173
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QuoteOriginally posted by Jewelltrail Quote
Here we are at 13mm I believe:
Wow, thats an amazing image - congrats. Thats like a brick wall, but huge. And the range of sharpness from top to bottom to each corner is incredible.

01-12-2010, 10:42 AM   #174
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QuoteQuote:
philbaum: Wow, thats an amazing image - congrats. Thats like a brick wall, but huge. And the range of sharpness from top to bottom to each corner is incredible.
Thanks Phil--the lens is pure delight--no doubt.
01-14-2010, 10:51 PM   #175
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Time to wake this thread up with a cheesy snap shot

01-17-2010, 12:38 PM   #176
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And here we are @ 15mm:
01-17-2010, 02:19 PM   #177
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Shopping arcade in Picadilly

I took my 10-20 for a spin on Saturday.
Ended up at London's Picadilly and since it was rainy outside, I took a refuge in one of the shopping arcades along the street. Had few good results. Here is one:

01-17-2010, 10:18 PM   #178
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Granville Island in Vancouver BC

01-17-2010, 10:53 PM   #179
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QuoteOriginally posted by cb750r Quote
Granville Island in Vancouver BC

Very Nice.
01-18-2010, 04:20 PM   #180
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Some really nice images coming out on this thread, keep it up folks!

Two more recent ones, both with ND110 filter attached:



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