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Forum: Pentax K-30 & K-50
11-21-2013, 04:57 PM
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But the biggest deal here is that nikon adjusts the exposure in the raw file. The exposure. (aperture/shutter speed) The shadows are only bumped up if you open the raw file in the nikon software. So it will physically underexpose the image. The Active part of Active-DL would work even if there was film in there instead of a sensor. THAT is the big difference as I see it. I don't care about the shadow adjustment, open in lightroom and it won't be there. But saving my highlights without resorting to higher iso is what nikon gives me over the regular DL control. (and that's the difference between active DL and regular DL).
I'm not saying it's better, but it is not the same as the pentax system. It's significantly different in that one regard (active exposure adjustment).
Charles.
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Forum: Pentax K-30 & K-50
11-19-2013, 06:50 PM
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Similar how? Pentax ups the ISO one notch to create a noisier image. Nikon actually changes the exposure settings. For Pentax, it means you can never take a shot at ISO100. Nikon doesn't affect ISO, aperture/shutter speed is modified, so you can still shoot ISO100. What's more, you can tell the Nikon exactly how strong you want the effect, where the Pentax has only one setting.
I'm not getting how those are similar at all.
Charles.
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Forum: Pentax K-30 & K-50
11-19-2013, 04:20 PM
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"ADL moves your zero meter reading in all but the Low setting. Each progressively more aggressive setting moves it until it is ultimately changed by a full stop on extra high. Thom Hogan puts the exact numbers in his D90 manual, I think they are probably in the D7000 manual as well.
If you want this feature but want the true meter reading keep it on Low."
Reference with test images (including shutter speed, aperture, iso readings): Does Active D lighting change the exposure? - Photo.net Nikon Forum
Pentax highlight correction does not change the meter's zero reading, so they're not the same.
Charles.
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Forum: Pentax K-30 & K-50
11-13-2013, 10:45 PM
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1) The ISO still shows exactly the same in the exif. (just noting this)
2) There's some ISO manipulation going on behind the scenes, but it's still only one stop. Highlights still blow.
3) I want a setting where the camera will expose for highlights.
4) While the photo I posted is easy to correct for, by dialing in exposure compensation (which I did in subsequent shots), when photographing moving subjects in constantly changing stage lighting, I don't have the luxury of chimping, and there is no histogram in an OVF.
5) I'm not a Nikon fanboy. I'm explaining that the technology I want is present in some form or another.
6) I was originally asking whether that same technology was available in any Pentax bodies. But everyone and their mother responded without bothering to read about what i was really after, or judge me, or tell me a different way of doing things, or imply that I have no idea what I'm doing, or even tell me I'm wrong for wanting what I want. But none answered the actual question.
7) After all this, my guess is that no, what I want doesn't exist, and Nikon cameras probably don't even do exactly what i want. They're likely not even close to aggressive enough.
What I want is a setting in the camera that will expose for highlights, and thus never blow them. This obviously wouldn't work in all situations, but it will work in several of the shooting situations I encounter. But since it doesn't exist, there's not really a point to continuing this thread.
Charles.
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Forum: Pentax K-30 & K-50
11-13-2013, 09:34 AM
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Can you please go back and read this thread a bit before making such a quick (and completely off-base) posting? I'm talking about ACTIVE Dynamic Lighting, and using the example as implemented on Nikon cameras.
On a Nikon camera, if you turn ADL on, the EXPOSURE WILL CHANGE. I'm not talking about highlights being cut by finagling with ISO, I'm talking about the camera actively adjusting the exposure settings AT THE TIME OF CAPTURE such that the highlights are not blown in the first place -- not "fixing" the blown highlights after the fact with digital processing. The Nikon system effectively dials in exposure compensation as you're shooting, in order to ensure that highlights are never blown. That's a COMPLETELY different solution. Instead of trying to fix blown highlights with digital manipulation, ADL simply adjusts exposure so that it doesn't blow the highlights in the first place.
On a Nikon, you can easily see this. Point the camera at a dark object so that it almost completely fills the frame, and have a bright object (like a lamp) in the corner of the frame. With ADL off, the camera will expose for the entire frame. The dark object will be exposed correctly and the light will be completely blown out.
But turn ADL on, and the aperture and shutter speed will change, and the EXPOSURE will be adjusted such that the light will not be blown out. The exact same framing will result in different shutter speed and/or aperture value when ADL is turned on. This will of course under-expose the dark object, but for the situations I need ADL for, this is not a problem.
Charles.
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Forum: Pentax K-30 & K-50
11-13-2013, 06:02 AM
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Nope. Highlight correction is digital, and has no effect on raw files. It does not effect the exposure at all, and highlights are still blown -- they're just blown a little bit less. I want a setting that is "never ever EVER blow my highlights. Ever." The highlight correction in Pentax is not active, it's passive.
Charles.
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Forum: Pentax K-30 & K-50
11-12-2013, 04:23 PM
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I know it's not a catch-all for every situation, but it'd be damned useful for most of my shooting situations. Especially when I'm dealing with subjects like this, or worse yet, stage lighting, where the subjects are lit quite brightly -- yet with constantly changing intensities, and I don't give one flying fark about the background. Situations where a blown highlight is someone's face, or someone's dress, and once the moment has passed it can never be captured correctly again.
Was hoping the K-30 would be better at this than my K-x :/
Not that i dislike my K-30, mind you. The image quality, weather sealing, autofocus, high iso, and star tracking capabilities are greatly appreciated. But, active D would be *extremely* useful to me in a great deal of my shooting situations.
Charles.
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Forum: Pentax K-30 & K-50
11-12-2013, 12:15 PM
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no, you're wrong. Active-D lighting has two stages: The active stage adjusts the EXPOSURE, which also affects the raw file. Then it boosts shadows, the same as Pentax shadow correction. But there is the active correction portion, which does adjust the exposure in just the situation above.
Charles.
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Forum: Pentax K-30 & K-50
11-12-2013, 09:41 AM
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I'm not saying it's not user error. I know how to adjust in exposure compensation. But I don't want to have to. Nikon's Active Dynamic Lighting (ADL) does what I want -- it changes the exposure metering if there would be blown highlights. (It also bumps up shadow detail digitally, but the part I care about is the active metering adjustments).
Everblog2: Highlight protection with Nikon's Active D-Lighting
Do any Pentax cameras offer this feature?
Charles.
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Forum: Pentax K-30 & K-50
11-12-2013, 08:15 AM
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Well, in subsequent photos I did dial down exposure compensation. What I'm getting at though is there are situations when I never (read: pretty much all the time), and there is no way to keep the auto exposure from doing that :/
Charles.
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Forum: Pentax K-30 & K-50
11-12-2013, 07:04 AM
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Here's what I'm talking about. This isn't a particularly hard shot, I don't think. But the highlights are completely blown out. Resized, but exif intact.
Short and sweet:
K-30 with 55-300mm lens.
1/320
f4
ISO200
0.00 exposure compensation
Tv mode
Charles.
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Forum: Pentax K-30 & K-50
11-10-2013, 04:17 PM
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Was using matrix metering, av or tv, and lots of midday bright sun. But it doesn't really matter, highlights are often blown regardless of lighting conditions or attached lens.
Charles.
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Forum: Pentax K-30 & K-50
11-10-2013, 12:28 PM
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Both my kx and my k30 tend to over expose shots in bright sunlight. I often get blown highlights and have to dial in exposure compensation, no matter what mode I'm in. Is there a way to set an exposure mode so that highlights will never be blown? Or is that only a canonikon feature?
Charles.
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