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10-20-2010, 01:34 PM   #1
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Good lens needed for K10D shots at convention centers

I'm looking for a good indoor lens for convention center photos with my K10D. What's the best lens for taking pictures of people 5 to 15 feet away in very poor lighting conditions? There wouldn't me much motion in the pictures as people would be posing.

I know I'll have to bump the ISO up but 1600 looks like garbage on my camera. I was thinking of something that's F1.2, F1.4, or F1.8, but I'm not sure if that's good for taking a full body shot of someone that's 5 to 15 feet away in super low light.

I would prefer a Pentax lens. I was also thinking it would be nice to have auto focus but it's not a requirement...

I'm really open to any suggestions, Pentax or not.

10-20-2010, 01:44 PM   #2
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You might have better luck with a good flash (or two) rather than a super fast lens that has no depth of focus.
10-20-2010, 01:50 PM   #3
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What lens can you recommend that wouldn't need a flash for that type of situation, one with a higher F rating?
10-20-2010, 02:29 PM   #4
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To be honest, no lens can be fast enough in extremely poor lighting conditions with the K10D. ISO 800 is about your limit and you won't get a decent enough shutter speed if we're talking about dull indoor lighting.

You're only chance is flash.

10-20-2010, 02:31 PM   #5
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A manual focus screw-mount 50mm f1.7 should do it. Those come in an M or A variety. The A type has an automatic aperture. The adaptor is $30 from pentaxusa.com. This lens or similar shows up from time to time in the Marketplace and will fit your budget.
10-20-2010, 02:45 PM   #6
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QuoteOriginally posted by SpecialK Quote
A manual focus screw-mount 50mm f1.7 should do it. Those come in an M or A variety. The A type has an automatic aperture. The adaptor is $30 from pentaxusa.com. This lens or similar shows up from time to time in the Marketplace and will fit your budget.
Uhm...... Screw-mount lenses don't "come in M or A variety" (even though many screw-mount lenses have an A-M switch). K-mount lenses do, however. There is no need for an adapter with K-mount lenses.

Not sure what the budget is. An SMC-M 50mm F/1.7 is about $30 - $50, double that price for an SMC-A.

But 50mm on an APS-C sensor is too long for "a full body shot" at 5 - 15ft. A 28mm lens is probably more suitable.

I'm thinking of something like the Sigma 30mm F/1.4. Its price is in the neighborhood of $400.
10-20-2010, 03:11 PM   #7
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Yeah, what he said. It's after lunch and I'm falling asleep :-)
10-20-2010, 03:30 PM   #8
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how long is the duration and is it something you will be doing long term?

if not longterm, rent a Canon 20D + 28mm F/1.8 for the timebeing.

10-21-2010, 05:13 AM   #9
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I don't mind adding another lens to my collection. I have the kit lens and the Pentax 50-200 lens also.

I think maybe the best thing to do is take the body to my local camera shop and just try a few of them out.

I guess I'll set it to ISO800 and see what kind of results I get.
10-21-2010, 05:17 AM   #10
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I think Ash is right here. From the distance you indicated, in poor lighting conditions, flash is the best answer to the problem if they allow you to use it.

Tom G

Last edited by 8540tomg; 10-21-2010 at 05:36 AM. Reason: typo
10-21-2010, 06:39 AM   #11
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No, unfortunately flash really isn't an option.

What kind of lenses do people use at concerts when no flash is allowed and they're trying to capture someone drumming or playing a guitar?
10-21-2010, 07:32 AM   #12
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QuoteOriginally posted by Rezolution Quote
No, unfortunately flash really isn't an option.

What kind of lenses do people use at concerts when no flash is allowed and they're trying to capture someone drumming or playing a guitar?
The ones we mentioned above. Small f-stop number like 1.7 or 1.4 etc.
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