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06-16-2011, 01:28 PM   #16
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Well looking at your pictures the light isn't as bad as you say. So I would say get the 21mm and give iso a notch, and buy that K-r successor for christmass and you are good to go.

06-16-2011, 01:33 PM   #17
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anyway, personally I would had vouched for something around 28-35mm focal length for these purposes. it's wide enough for whole body and half-body portraits if that was his purpose. such lenses are Sigma 28, Sigma 30, Pentax FA31 and FA35. although I find that anything at 20-24mm the most convenient to use. the extra wideness gives me the necessarily flexibility and closeness to the subject I'm shooting. the annoying thing with those kinda conventions are some of those other photographers blocking your view or jock for position. having a wider lens would get you infront of the action which is great.

on those convention, I use a 12-24 zoom + flash and a fast 85mm.
12-25-2011, 08:08 AM   #18
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Regarding Flash

I use the cheaper of the two sigma flashes ($160) with a gary fong origami diffuser. I find that it is easy to use and gives me consistently good results. The origami diffuser is very simple to use.

I got the sigma flash as a gift and I'd rather have the pricer model ($260ish) as it offers a lot more control over the unit... but the cheaper one is solid.

The only issue is that it makes my whole rig very tall. But it gets the flash away from the lens, softens and spreads out the light. I mostly use this with the 18-135mm but I have also used it with the 21mm ltd.
12-25-2011, 12:24 PM   #19
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As others mentioned, having a flash on a light stand behind you is a good idea. Using a simple RF flash trigger like the Cactus V5 and you would be set.

Lens wise, I don't think there is much else around 20mm that is fast as the Sigma. However, it doesn't look very strong at f1.8. Wide angle and large aperture don't often go well together.

From your photos, it looks like you attend ACEN. I've probably seen you around! If so, are you going to ACEN for 2012? You will have to let me know where in the dealers room you end up and we can talk Pentax gear for a bit.

I'm all about convention photography.

12-26-2011, 05:34 AM   #20
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I definitely hit ACEN. It's normally my 5th or 6th con of the year.

I've actually settled on getting a Sigma 24mm f/1.8 for it based off of further digging into what I take. I can work with that really well. In the meantime I'm still using my Sigma 18-50.
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