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02-08-2016, 08:30 PM   #1
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Need help choosing other lens

Hi I currently have K-3 ii and DA 12-24mm lens. I love the lens the picture quality is great but when I shoot videos at night the image gets dark even though I set the lowest shutter speed and aperture (set to 1/30 and f/4) but when I turn up ISO over 1600 the image got brighter but there are lots of noise. Anyway I'm not going to refund but I'm planning to buy other lens but I'm not sure what lens should I get? Especially when walking around while recording and sitting in the car front seat with bokeh effects as well I want to take photos with my family in full body/length at home and outside with bokeh effects in the background, from this distance to zoom in (shown in image attachments below and this image was shot using my phone) with clean, crisp & sharp HD image quality without flash needed when using handheld and weather & cold resistant. Thanks

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02-08-2016, 08:37 PM   #2
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(edit: this info pertains to still)

The noise is not the lens's fault.

If you disable noise in-camera reduction entirely and shoot at ISO 1600 or 3200, then reduce in noise in post, you should get much better image quality than with in-camera processing. Shooting in RAW will let you bring out even more detail, and I'd recommend always using it at night.

See:
Pentax K-3 Review - Low-Light High-ISO | PentaxForums.com Reviews

ISO 1600 100% crop raw


ISO 1600 100% crop jpeg


Pretty big difference, right?

Adam
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02-08-2016, 08:40 PM   #3
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Welcome to the forum!
Are you trying to take videos or photos?
At night time a tripod can help with photos to help get a longer shutter speed, as at night it is hard to get good photos without a long shutter speed.

QuoteOriginally posted by Adam Quote
EXIF says this is a cell phone photo?
I think he is saying that he is trying to take videos with his K-3ii.
Then he took screenshots of the video with his cellphone on the camera screen?
02-08-2016, 08:46 PM   #4
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Ah, missed that because the cell phone pics threw me off.

You can't expect to get very good video image quality at night, unfortunately. Current Pentax bodies have fairly low video detail to begin with due to compression. Shooting with a tele lens (rather than cropping the video file) will help, but unless it's a very fast lens (F2 for instance) you'll still be pushing the limits of the ISO range. Remember that videos require a shutter speed of at least 1/30s - notice how the still from your phone enjoyed the luxury of being captured at 1/9s, and with a rather fast lens


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02-09-2016, 08:54 AM   #5
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Video at night is very difficult. You really need an entirely different system. Not another dslr, but a real no-kidding professional cinematic camera. Probably a $50,000 prospect.

A faster lens will help some, though. If you want a wide-ish to normal lens, I like the Sigma 24mm/1.8 or Sigma 30mm 1.4.
02-09-2016, 11:30 AM   #6
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QuoteOriginally posted by Kozlok Quote
Video at night is very difficult. You really need an entirely different system. Not another dslr, but a real no-kidding professional cinematic camera. Probably a $50,000 prospect.
...
Maybe A7S (II) can help you in this. (2-3000 $ not 50 000).
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