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Forum: Lens Clubs 06-24-2011, 01:54 AM  
SIGMA 10-20mm CLUB
Posted By ihasa
Replies: 3,844
Views: 936,212
Keeping the thread going!



Forum: Lens Clubs 04-28-2011, 05:05 PM  
SIGMA 10-20mm CLUB
Posted By ihasa
Replies: 3,844
Views: 936,212
Nice shots Gareth, the sand makes great patterns.
Forum: Lens Clubs 02-07-2011, 08:07 AM  
SIGMA 10-20mm CLUB
Posted By ihasa
Replies: 3,844
Views: 936,212
Whoa!! The sense of scale there is quite spectacular, looking up at the Golden Gate Bridge.
Forum: Lens Clubs 02-06-2011, 04:09 PM  
SIGMA 10-20mm CLUB
Posted By ihasa
Replies: 3,844
Views: 936,212
Images from the underworld of Birmingham:







I really enjoyed using the 10-20 this weekend, and am well pleased with the sharpness of these shots... the third shot was f9 1/4s hand held (I framed the shot in live view and used my camera strap to brace against movement)...
Forum: Lens Clubs 01-23-2011, 04:51 PM  
SIGMA 10-20mm CLUB
Posted By ihasa
Replies: 3,844
Views: 936,212
I think you're right, the reason my 14mm shots seem to be edge to edge sharper could well be that there is less of that extreme difference of focus distance than at 10mm. I should probably have tried focussing closer to the foreground and letting the depth of field take care of the background focus. But I also get a feeling that the focal plane is rather curved.

The shot was taken at the ruined priory in Dudley.
Forum: Lens Clubs 01-21-2011, 08:20 AM  
SIGMA 10-20mm CLUB
Posted By ihasa
Replies: 3,844
Views: 936,212
Here's one from my 10-20



I've noticed on this shot and many others at 10mm that the corners of the shot seem soft and 'stretched' - is this just a by-product of the optical design of the lens?

The best edge to edge sharpness seems to be at about 14mm.
Forum: Lens Clubs 11-06-2010, 12:55 PM  
SIGMA 10-20mm CLUB
Posted By ihasa
Replies: 3,844
Views: 936,212


Gheluvelt Park in Worcester, lit by Pentax AF280T Flash. The 10-20 is a very useful lens. Maybe its not quite as good as the 12-24, but much cheaper.
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