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Old Aug 2, 2008, 11:13 PM   #61
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I have what is surely an elementary question, but I want to be sure I know what you mean by "stopping down to f11". Do you mean shooting in aperture-priority mode and setting the aperture to F11 for the most sharpness?

It's been so long since I've used an SLR, I have to relearn some stuff (and learn a lot for the first time, for that matter!).

Anyway, I figure I can't be the only person who wonders what stopping down means, in the nitty gritty.
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Old Aug 3, 2008, 12:49 AM   #62
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Thats exactly what it means.
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Old Aug 3, 2008, 3:25 PM   #63
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Thanks! Cool...So, you might have to compromise sharpness on a landscape shot where you use a small aperture to have more of the scene in focus? It's that balance I need to learn about, and how different focal lengths are better for different applications.
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Old Aug 3, 2008, 4:37 PM   #64
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Gardenwife wrote:
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So, you might have to compromise sharpness on a landscape shot where you use a small aperture to have more of the scene in focus?
Actually, stopping down to about f/8 or f/11 usually increases sharpness. The compromise is that inorder to get the greater sharpness and larger depth of field, you have to use a longer shutter speed (risking motion blur) or a higher ISO setting (risking noise.)

A longer shutter speed on a landscape shot may not seem like a problem, but aside from the potential for motion blur from camera shake (IS not withstanding) there is the potential for a bird or two to fly across your frame, causing an interesting smear across the sky.

And noise sort of negates the increased sharpness.
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Old Aug 3, 2008, 4:41 PM   #65
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I think we are now, officially 'Off Topic'.

Perhaps it's time to start some new topics, so that passers-by won't miss some of these worthwhile exchanges because they don't care about the Tamron 28-105.
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Old Aug 5, 2008, 1:24 PM   #66
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True.



Is it on topic to ask what this particular Tamron lens' sweet spot is?
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Old Aug 5, 2008, 3:08 PM   #67
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Gardenwife wrote:
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Is it on topic to ask what this particular Tamron lens' sweet spot is?
It's a $40 lens! You want a sweet spot too? [suB]:-)[/suB]
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Old Aug 5, 2008, 3:17 PM   #68
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Have cake.
Want to eat it, too.

:-D
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Old Aug 5, 2008, 3:23 PM   #69
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Buy one (at KEH.com) and if you can't find a sweet spot, throw it away!

Btw, this has a maximum aperture of f/4-5.6. It may not work wellfor portraits, if that's what you're after.
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Old Aug 5, 2008, 3:40 PM   #70
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I already have this particular Tamron 28-105mm lens, thanks to that deal on Amazon. I'm just wondering if other users have tips for getting the most out of the lens with the Sony A300. I'm ever so on topic! LOL
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