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Jan 28, 2013, 03:10 AM
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Will the version for the nex5n be able to handle the nex5n with the 1855 lens?
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Jan 28, 2013, 03:14 AM
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Quote:
Originally Posted by ~>Miha<~
Indeed, and these motors/controllers are amazing. Not sure what is harder for them, to do this (see below) or to get smooth footage from the wobbling junk frame called S-800.

http://www.youtube.com/watch?v=78zhv8FCo24

BTW, still nobody got an answer to my question re. why these rewinded BL can do almost the same as the Maxons and at so much lower Voltage?
Its not only the motors that allow that kind of control. The controllers have full dynamic motion control capabilities , not just positioning. They have direct to axis feedback as well. Technosoft has some controllers that are capable of that kind of motion control that I have worked with in the past. It really requires some fast DSP capabilities that the AVR just wont do anyway.

With direct axis feedback though, the AVR could get pretty close and it wouldnt matter what crappy frame it was on!!!
Jan 28, 2013, 04:25 AM
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Quote:
Originally Posted by KKUSA
Its not only the motors that allow that kind of control. The controllers have full dynamic motion control capabilities , not just positioning. They have direct to axis feedback as well. Technosoft has some controllers that are capable of that kind of motion control that I have worked with in the past. It really requires some fast DSP capabilities that the AVR just wont do anyway.

With direct axis feedback though, the AVR could get pretty close and it wouldnt matter what crappy frame it was on!!!
I think the Maxon Epos controller is the right stuff for this, pretty expensive.
I already asked this before but isnīt this a task for Labview to simulate the hole thing rather than coding at trial and error?
Jan 28, 2013, 06:20 AM
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DorianJ's Avatar
Quote:
Originally Posted by jcmonty
Good to know! I will have to look into it for my Canon. Though i am thinking of sucking it up and getting a GH3..
You lose in-camera control of focus and iris. These functions are manually controlled from the lens barrel, done like real filmmakers

OK back to direct drive discussion!
Jan 28, 2013, 07:44 AM
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andrebandre's Avatar

Thank you Jussi.
I love the rendering of the gimbal and hopefully it will get into production.
Jan 28, 2013, 08:43 AM
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Rod Cole's Avatar
Quote:
Originally Posted by DorianJ
an picture, no distortion and not too wide Half the weight of the Canon 20mm and IMO a cleaner image.
Of which Nikon 20mm prime are you speaking? The Nikon AI mount or the current G mount. I have several AI mount Nikon primes that I hang on my 5D3 with great results. One thing I really like about these manual focus lenses is the large focusing throw which the new digital lenses do not have. This makes them much more like a real cinema lens except that they focus backwards from cinema lenses. The AI Mount version has the advantage of manual iris which would be my preference.
Jan 28, 2013, 09:53 AM
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I'm a bit confused by who's making what. Will the controllers be made by the same person/company or by anyone who pays a license fee to Aleksey?

I gather viacopter and flyduino will be selling the controllers separately?

Is e-copter making the gimbals for viacopter and flyduino?

How will you distribute the items around?
Jan 28, 2013, 01:20 PM
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Daloaf's Avatar
Quote:
Originally Posted by jcmonty
Good to know! I will have to look into it for my Canon. Though i am thinking of sucking it up and getting a GH3..
The GH3 looks awesome, but I'm still pissed they made it much larger and heavier (and more expensive). Not as aerial friendly as the GH2 is.
Jan 28, 2013, 03:56 PM
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We have a gh3, it's an amazing camera
Jan 28, 2013, 04:54 PM
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Jan 28, 2013, 04:58 PM
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Quote:
Originally Posted by Hypam
I think the Maxon Epos controller is the right stuff for this, pretty expensive.
I already asked this before but isnīt this a task for Labview to simulate the hole thing rather than coding at trial and error?
There are cheaper controllers that are suitable. Labview isnt ideal for simulating this either. It would work, but a lot of work involved. Matlab would be more ideal.

Actually, the Thechnosoft controllers can be programmed right in Matlab.

http://www.technosoftmotion.com/prod...in-modules.htm


The AVR/Arduino/ST Driver solution will work just fine though, it just needs better axis feedback.
Jan 28, 2013, 08:45 PM
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Quote:
Originally Posted by JussiH
our gimbal is designed to put the lens on the exact center of the roll and pitch axises.
Wouldn't it be around the focal point for the tilt axis?
Jan 29, 2013, 04:11 AM
Friend is a 4 letter word...
JussiH's Avatar
Quote:
Originally Posted by QuadGod
Wouldn't it be around the focal point for the tilt axis?
Yes, thats an error. Its centered on the roll axis, of course....
Jan 29, 2013, 04:21 AM
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EndOfDays's Avatar
What does that help? If the object is some meters away (with some reasonable optic) the error in the picture is (far) below 1 pixel width. Furthermore you would have to tell the copter, that if he "wobbles" he should to it please around the "optic center" of the cam, otherwise the cam being positioned in "optic center" makes no sense.

If the gimbal is in balance that helps a lot, that the gimbal has to move the cam around itīs optic center is a forum-myth (like many others) in the internet.

best regards
Ferdinand
Jan 29, 2013, 04:34 AM
Friend is a 4 letter word...
JussiH's Avatar
Quote:
Originally Posted by EndOfDays
What does that help? If the object is some meters away (with some reasonable optic) the error in the picture is (far) below 1 pixel width. Furthermore you would have to tell the copter, that if he "wobbles" he should to it please around the "optic center" of the cam, otherwise the cam being positioned in "optic center" makes no sense.

If the gimbal is in balance that helps a lot, that the gimbal has to move the cam around itīs optic center is a forum-myth (like many others) in the internet.

best regards
Ferdinand
Yes, you are probably right - not that important after all...specially not on a wide FOV cam like the GoPro. I stand corrected


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