Topic: DSLR Light Flicker Issue

Hi all,

Having some problems in setting up my DSLR, and as you were all really helpful last time I figured I'd try here again. I recently got Dragonframe and the Nikon D5100 as an upgrade from iStopMotion and my cheap little webcam. I have had next to no problems in the past with lighting so this can't be to do with my setup, but the settings on the camera and/or software.

http://i.imgur.com/VT0MQHG.gif

As you can see, the light changes really substantially between frames. As I've said I have had no problems whatsoever with my previous setup, and was hoping that somebody good with cameras, or owns the D5100 can shed some light on the issue.

http://i.imgur.com/TRtMqwA.png

These are the settings on the camera, again, nothing obvious wrong (at least to me).

Thanks in advance for your help,
-Jacob

Formerly known as the2awesomeguys

Re: DSLR Light Flicker Issue

Checking to make sure white balance and exposure time are set manually and not automatically would be a good first step. If you've already done that, I can't help you.

Re: DSLR Light Flicker Issue

You should switch it to M. That gives you full control of the settings and look for your picture.

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Re: DSLR Light Flicker Issue

It could be your lighting setup. DSLRs pick up a lot more light and detail than webcams, so if your lights are flickering, it will be more noticeable. Like everyone else said, be sure to set you camera to M (Manual) mode so the white balance and exposure doesn't change for each frame. Active-D lighting should probably also be turned off. It adjusts the light in the back of the picture, and gave me bad results before. I've read about this flaw in lenses where it slightly changes the aperture for each frame even though it's all set to manual, so you may want to look that up too. I haven't found a way to fix it though.

Also, a few things un-related to light flicker you might want to notice:

Since you have a VR (Vibration Reduction) lens, you should probably turn that off. It can make the set/camera bump effect even if your camera was not bumped. Manual Focus is a must too, so the focus will not change on every frame.

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Re: DSLR Light Flicker Issue

Willco66 wrote:

Checking to make sure white balance and exposure time are set manually and not automatically would be a good first step. If you've already done that, I can't help you.

Legocloniac477 wrote:

You should switch it to M. That gives you full control of the settings and look for your picture.

rioforce wrote:

Like everyone else said, be sure to set you camera to M (Manual) mode so the white balance and exposure doesn't change for each frame. Active-D lighting should probably also be turned off.

Thanks all for your help, I've just done a quick test and there isn't any light flicker issues. Sorry again for the poor quality gif;

http://i.imgur.com/h4UyV3F.gif

After fiddling with the settings regarding white balance and exposure I've come up with a preset that appears to work.

rioforce wrote:

Since you have a VR (Vibration Reduction) lens, you should probably turn that off. It can make the set/camera bump effect even if your camera was not bumped.

Yes, I did notice this right after I did that little test. Upon switching it off the result is much more smooth, so thanks for that little tip;

http://i.imgur.com/NGDLq9a.gif

While I am here, I may as well ask a couple more questions I have regarding the use of a DSLR, seeing as I'm new to it all. Firstly, what would you recommend for lighting? In the live view feed my images look fine (if a little grainy), but in the cinematography window the images are much lighter than from the feed. So I can't really preview my images properly, or is it just a case of trial and error until the desired effect is there, and then begin to animate?

Also, what sort of lenses would you recommend? I'm finding that with this one the background is to blurred for my liking. What sort of lenses are available at a fairly economic price that give a good depth of field?

Again, thanks all for your help, it is greatly appreciated.

Formerly known as the2awesomeguys

Re: DSLR Light Flicker Issue

The blure should be able to be adjusted in M I think its under F.6 or something also normally in live view you can't see the real focus distance this effects the brightness so there should be a button somewhere on your camera other wise you just have to take a photo and see what the focus distance is.

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Re: DSLR Light Flicker Issue

the2awesomeguys wrote:

While I am here, I may as well ask a couple more questions I have regarding the use of a DSLR, seeing as I'm new to it all. Firstly, what would you recommend for lighting? In the live view feed my images look fine (if a little grainy), but in the cinematography window the images are much lighter than from the feed. So I can't really preview my images properly, or is it just a case of trial and error until the desired effect is there, and then begin to animate?

I am not too familiar with Live View, because I usually use the viewfinder on my camera. But I have noticed that Live View can be darker and grainier, because it uses a lower quality image to stream through the live view and give you a live feed. If you're not happy with the brightness of the final picture, you can turn down your exposure. It's all about what the final result looks like that counts, not the live view. You may want to look at your Meter on your camera to determine a good exposure. (See this link for more on Metering: http://photographylife.com/understanding-metering-modes The viewfinder isn't the only place to find the meter, though, you can see it on your DSLR screen where you change the exposure. It's that little dashed line)

the2awesomeguys wrote:

Also, what sort of lenses would you recommend? I'm finding that with this one the background is to blurred for my liking. What sort of lenses are available at a fairly economic price that give a good depth of field?

The depth of field is controlled by the aperture of your camera. If you make the aperture smaller, you will have to change your shutter speed to a slower one, but it will produce a deeper depth of field (meaning the background isn't as blurry). The lower the F/stop, the shallower the Depth of Field. So, you don't need a new lens because your pictures are too blurry. If you're looking to buy a lens anyway, you should get a Macro. It lets your minifigs be closer to the camera while still being in focus. However, I've found that the standard Nikon lens that comes with most camera kits (a 35mm lens) works well. mini/smile

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Re: DSLR Light Flicker Issue

It looks like you are using Dragon Frame so you should be able to darken or lighten the live view, so it is a close match to the actual captured frames.

In the Cinematography tab you could adjust the shutter speed to a faster speed or choose a wider f-stop to avoid the final frames from being over exposed, if your preview image gets to dark you can adjust the preview exposure from -4 to +4

Re: DSLR Light Flicker Issue

Just wandering through, you could check the resources tab.  It helped me when I got a DSLR.

Have a nice day! mini/smile

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