The end of 35mm adapers and hv20s....

John Caballero said:
I was reading thru the dpreview for the camera and in the auto lock spec the above info was given. It doesn't say anything about working for the DMovie but what I am curious is what the heck does "set via CSM f4" mean? May this be what the Nikon rep was talking about? I could not find what it was anywhere.
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It's a menu, perhaps 'Camera Settings Menu'.
 
John Caballero said:
Just like I said before and somebody came along and corrected me with his own version, incorrect as this shows. This is from a place with real knowledge on the matter.
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That would be me - and you are still wrong ! :)

Don't take my word, take Wikipedia's:

Motion JPEG uses intraframe coding technology that is very similar in technology to the I-frame part of video coding standards such as MPEG-1 and MPEG-2, but does not use interframe prediction. The lack of use of interframe prediction results in a loss of compression capability, but eases video editing, since simple edits can be performed at any frame when all frames are I-frames. Video coding formats such as MPEG-2 can also be used in such an I-frame only fashion to provide similar compression capability and similar ease of editing features.
 
There are two similar words describing different compression methods.

From wikipedia:

Intraframe vs interframe compression

One of the most powerful techniques for compressing video is interframe compression. Interframe compression uses one or more earlier or later frames in a sequence to compress the current frame, while intraframe compression uses only the current frame, which is effectively image compression.

http://en.wikipedia.org/wiki/Video_compression#Intraframe_vs_interframe_compression
 
i have a forum that hasn't gone public yet. but i filled out a Nikon D90 section with sub-forums for test footage, shorts, workflow, etc. i think by the 7th could fill out quickly. anyway, if you guys want to use it, great! if not, no biggie.

cinefist.com/forum

the site is still being developed and is a work in progress, but it's there if you want it.
 
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That would be me - and you are still wrong ! :)
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Check it out here:
http://www.morgan-multimedia.com/technicalsV3.htm

Well, this guys are in the business of everything MJPEG, so you have to tell them they are wrong and to get out of the business. They'll problably have a good laugh at your expense. Wikipedia by the way have plenty of stuff that is wrong, basically because they have people contributing stuff to it that is wrong in the first place.

BTW: Where has Mr. Barry Green gone? Is he on vacation or shooting at an exotic location? Can he be reached and be asked about MJPEG compression? He IS the book!
 
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From Panasonics FAQ on the HVX 200
What is the difference between DVCPRO HD and HDV?

There are several fundamental differences between the two technologies. DVCPRO HD uses intraframe compression, which means every frame is compressed, recorded and edited independently. HDV uses long Groups Of Pictures frame compression that interpolates presumed frames and is not frame independent. This is of critical importance during the editing process and in general requires rendering.
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Intraframe is the same method used with MJPEG isn't it? When you record 720PN in the HVX you are recording only 24 unique FPS with no pulldown or anything. And that is what MJPEG does with the 24 frames in the D90.

Perhaps 'Custom Settings Menu'?
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Custom Settings Menu it is madmanden.
 
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Ok guys is official: I can't sleep more than three hours anymore, I guess the D90 virus. Anyway, I am learning so much about my D40X it is unbelievable. I found the Custom Settings Menu, it was there all this time and I was neglecting it badly. To get the AF-L and AE-L options setting you first have to expand the options with another setting. Once you do that you get options 12 and 13 that deal with this. I tried it and yes it works! One of the settings allows you to press the AF-L/AE-L button and it locks the exposure until you press again. I tried with shutter priority and worked fine. Lets us all hope and pray together that this is the way it works in the D90 also and solves the flickering issue in the movie mode. If not.....
 
I tried a few things with my D80. I set it to manual mode, dial in the shutter speed and aperture I want and then press the AE-L button to lock it. I then switch to auto mode (to simulate switching to D-movie mode on D90). The problem is, AE-L doesn't stay locked when I switch to auto. I hope it does when switching to D-move mode on the D90. Otherwise it will be a hassle changing the exposure "on the fly". You'd have to find something to point the camera at that gives you the exact values you want. On the HV20 for example, you can at least lock exposure and then change it to whatever you want while it's locked. Ideas?
 
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I did not tried it that way because I does not work that way. Auto exposure is set when the camera is in any of the auto modes. It reads the exposure then you lock that exposure. The second you move the mode's button and change it to something else the locked exposure releases. If you put the camera in manual it means manual. You set it manually! If you then change it all of your manual settings are gone! So, if the movie mode does not work in manual mode the only logical way is it sets to either auto on S, (shutter priority), or A (aperture priority). After that you would have to frame the scene, lock the exposure, then start shooting. It should not be more complicated than that, we hope.
 
I hope so too, but never mind, I just remembered that a manual lens doesn't communicate with the house. So if D-movie mode means auto-everything then all you have to do is point the camera at something that gives you the shutter speed you want, lock it and dial in your aperture with the lens. But still, it would be nice to be able to have shutter priority in D-movie mode.

Sorry to bring this up again. :P This is hopefully my last post on the exposure subject.
 
Its ok to talk about this still. I don't know about dialing in the aperture because that is locked along with the shutter priority, (S in the mode dial button), in the first place with digital lenses. I don't know if it would work with any of the Nikon manual lenses.
 
Right. Neither auto, shutter priority or aperture priority seem to work with a manual lens. It seems like the only mode that works with a manual lens is the manual mode. So, if D-movie mode can't be all manual we can't use a manual lens?
 
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I tried a manual lens yesterday and the camera would not work at all. It said "no lens attached" in the back screen. I don't know if any certain type of manual lens would work with it at all.
 
what would be a good zoom lens for this for video work... I have a set of these already: 28, 35, 50, 85, 105

Thanks!
 
darst said:
what would be a good zoom lens for this for video work... I have a set of these already: 28, 35, 50, 85, 105

Thanks!
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Not an easy question to answer these days..... There are short zooms (17-35)..... medium range zooms(24-70).....longer zooms (80-200)

These might be Canon numbers, But I'm sure Nikon has similar ranges.

frisco
 
Norbert said:
I tried a few things with my D80. I set it to manual mode, dial in the shutter speed and aperture I want and then press the AE-L button to lock it. I then switch to auto mode (to simulate switching to D-movie mode on D90).
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AFAIK, this is NOT how you get into D-movie mode with the D90. With the D90, you can be in any mode including manual and then in order to record a video, you simply hit the "live view" button to go into live view and then hit another button to start recording the video (not the shutter release button).

The D-Movie mode is NOT something you select with the top mode dial.
 
darst said:
what would be a good zoom lens for this for video work... I have a set of these already: 28, 35, 50, 85, 105

Thanks!
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If you want an all purpose lens, I would wait for the Tamron 18-270 VC (stabilized). Its based on the Tamron 18-250 which has received very good reviews for a super zoom.

I'm not sure if you need a super sharp lens for video since 720p is a very low res for even the softest of lenses. Your prime set should be fine really. You just might want to get something wider than 28.

Perhaps one of the Tamron/Sigma 17-50/2.8 or the new Tamron 10-24.
 
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