|
Linedance posted:Rather than fitting a full DSLR, how about micro 4/3 format like Panasonic G-series etc.? Something like the panasonic GH2 or the sony NEX-7 would be light weight but still give phenomenal footage. Mirrorless dslr's definitely the way to go.
|
#
?
Apr 10, 2013 05:49
|
|
|
|
| # ? Jun 11, 2024 22:39 |
|
|
Snowdens Secret posted:Camera antishake (at least the ones I've used) is for very low-frequency stuff - like how your arms move when you hold a camera. If you put a high-frequency buzz like an engine vibration through it, it won't do squat, and the amplitude of any bumps in the road will overwhelm it. You're going to get a lot more vibration from a bike than a plush BMW, but you can't argue with the video quality you get from a DSLR. [video type=""]http://www.youtube.com/watch?v=sFSIPxWf4Gw[/video] That's with just a (good) suction cup mount, and some of those roads are very rough. Though if you were doing some Serious Filming on a bike, you might just be better served fitting a damped board on the tank and using a suction mount on that.
|
|
#
?
Apr 10, 2013 06:04
|
|
|
I'm not saying you don't get good video quality, that's going to be outstanding. I'm saying doing it for the anti-shake probably isn't worth it. The 7D doesn't have sensor anti-shake and the Sigma 8-16 doesn't have in-lens, so that video doesn't show anti-shake's ability or otherwise to cope. It does show that it hides it well by using a really wide-angle lens. Me personally I wouldn't hang 2 grand of camera + lens off the front of my car or the back of my bike unless someone else was paying for it.
|
|
#
?
Apr 10, 2013 06:52
|
|
|
ReelBigLizard posted:
A few years back, my friend and I were trying to get into remote control arial videography via helicopter, on a shoestring budget. I ended up fabricating several different underslung mounts for small point-n-shoot cameras. Isolating the camera from high-freq engine (or in our case, rotor) vibration is a bitch. The best combination I was able to come up with was suspending the camera on very fine springs wrapped in surgical tubing. Even with that, our video was marginal - until I found some magical freeware software that miraculously straightened out the footage. I cannot remember the name offhand, but I'll ask my friend. I'm sure you could also find it googling RC video software. Of course, we were using lovely little $100 point-n-shoots with no real IS to speak of (this was just before GoPro went big) - which was a good thing, because HeliCam Mk.1 met it's end spectacularly at full dive into the roof of my house (the memory chip survived and the video was pretty funny). HeliCam Mk. II (as pictured) fared better and was actually used in a short (paying!) project. We were both stoked; sadly he got married and had two children thus ending my dreams of becoming the Kubrick of the Air. We still lament about it some nights after his little tyrants have gone to bed.  My point is, software stabilization in post will work miracles, so don't immediately rule out any blurry footage.
|
|
#
?
Apr 10, 2013 07:35
|
|
|
https://www.youtube.com/watch?v=XacjXb3KZx4 Keep an eye on the top of the screen at 46 seconds.
|
|
#
?
Apr 10, 2013 07:38
|
|
|
Snowdens Secret posted:I'm not saying you don't get good video quality, that's going to be outstanding. I'm saying doing it for the anti-shake probably isn't worth it. The 7D doesn't have sensor anti-shake and the Sigma 8-16 doesn't have in-lens, so that video doesn't show anti-shake's ability or otherwise to cope. It does show that it hides it well by using a really wide-angle lens. Me personally I wouldn't hang 2 grand of camera + lens off the front of my car or the back of my bike unless someone else was paying for it. That's what I get for assuming! Me personally I can't afford 2 grand of camera and lens, let alone a new 335i. I'd happily hang a friend's off either though! When we were going down to lemans last year, we stopped at a service station and my mate wanted to try his GoPro on my bike. He was convinced the suction mount would work, and demonstrated it's effectiveness by attaching it and smacking it around and pulling on it. Sure enough it stayed firm, for about 2 minutes. Then as we're getting ready to set out... Clunk. It just fell off. We ended up using a standard handlebar mount instead. I'm going to have to ask if he ever ended up getting any decent footage off it.
|
|
#
?
Apr 10, 2013 07:50
|
|
|
What about knocking the guy in the face after as he get's away? 
|
|
#
?
Apr 10, 2013 07:53
|
|
|
Snowdens Secret posted:I'm not saying you don't get good video quality, that's going to be outstanding. I'm saying doing it for the anti-shake probably isn't worth it. The 7D doesn't have sensor anti-shake and the Sigma 8-16 doesn't have in-lens, so that video doesn't show anti-shake's ability or otherwise to cope. It does show that it hides it well by using a really wide-angle lens. Me personally I wouldn't hang 2 grand of camera + lens off the front of my car or the back of my bike unless someone else was paying for it. I don't know about where you are but here all the pro/semi-pro A/V guys I know just buy a camera insurance policy. 7D takes a tumble? no problem, like-for-like replacement! Same day!
|
|
#
?
Apr 10, 2013 08:12
|
|
|
Linedance posted:Rather than fitting a full DSLR, how about micro 4/3 format like Panasonic G-series etc.? The benefit with using cameras with interchangeable lenses is some of the vibration can be accounted for by the active anti-shake built into the lens. I also seem to recall watching a video demonstrating the use of an anti - vibe mat/pad to cut a lot of vibration in a camera mount, but I'll be damned if I can find it now. I'm not going to fit a DSLR to it unless someone is fool enough to lend me one. I'm building this for the GoPro and other small point and shoots. The point is to design it to take something as big as a DSLR as an upper limit, cause if you can do that, two GoPros on a 3D mount is a loving doddle  If something is worth building, it's worth over building.
|
|
#
?
Apr 10, 2013 08:15
|
|
|
ReelBigLizard posted:If something is worth building, it's worth over building.
|
|
#
?
Apr 10, 2013 09:27
|
|
|
The Royal Nonesuch posted:A few years back, my friend and I were trying to get into remote control arial videography via helicopter, on a shoestring budget. I ended up fabricating several different underslung mounts for small point-n-shoot cameras. Isolating the camera from high-freq engine (or in our case, rotor) vibration is a bitch. The best combination I was able to come up with was suspending the camera on very fine springs wrapped in surgical tubing. Even with that, our video was marginal - until I found some magical freeware software that miraculously straightened out the footage. I cannot remember the name offhand, but I'll ask my friend. I'm sure you could also find it googling RC video software. It's a shame your friend isn't into it any more -- it seems like the perfect application for a mid-range quadrotor.
|
|
#
?
Apr 10, 2013 12:46
|
|
|
The Royal Nonesuch posted:A few years back, my friend and I were trying to get into remote control arial videography via helicopter, on a shoestring budget. I ended up fabricating several different underslung mounts for small point-n-shoot cameras. Isolating the camera from high-freq engine (or in our case, rotor) vibration is a bitch. The best combination I was able to come up with was suspending the camera on very fine springs wrapped in surgical tubing. Even with that, our video was marginal - until I found some magical freeware software that miraculously straightened out the footage. I cannot remember the name offhand, but I'll ask my friend. I'm sure you could also find it googling RC video software. Can you post the crash video? Kinda want to see that.
|
|
#
?
Apr 10, 2013 14:41
|
|
|
ReelBigLizard posted:If something is worth building, it's worth over building. Totally agree, but unfortunately it seems 99% of the world's consumers and manufacturers don't.  I'm willing to pay for quality materials and good engineering, but seems that most people aren't.
|
|
#
?
Apr 10, 2013 17:40
|
|
|
Safety Dance posted:It's a shame your friend isn't into it any more -- it seems like the perfect application for a mid-range quadrotor. Yeah, that's the thing - a lot of people are doing it now, and doing it very well. Once things like quadrotors became easily available it became more commonplace. Flying a RC heli is seriously difficult, these newer spaceship things are much easier Plus, if you're going to do it ~~professionally~~ there are some real permits and insurance and stuff you have to jump through - neither of us have the time anymore...front wing flexing posted:Can you post the crash video? Kinda want to see that. I'll try and dig it up 
|
|
#
?
Apr 11, 2013 01:43
|
|
|
Here's the thing. The nice thing about the Contour is it's a nice round shape and you can spin it around its axis fairly easily. The GoPro is a clunkier box but at least it's light. DSLRs can be heavy and good glass is heavier still. If we look at these designs:ReelBigLizard posted:
We see the weight of the camera acting perpendicular to the plane of rotation, which is just going to torque up everything, cause drag and stiction and wear. Because the camera mount is far from the center of gravity, vibration is going to be amplified and translated into an arc, very distracting. What I would with the GoPro is take the square shape and slap arc segments on the sides so that the outside shape becomes a circle. It's a bigger hassle than it should be because the lens isn't centered in the case. I would then use a mounting ring to hold the gopro around the circumference of that circle. You can use grooves / bearings / slick surfaces etc to support it. The actual gyro rotation can be performed by a servo / geartrain acting on the axis itself (just like in that first pic) but now it's not supporting the (admittedly not much) weight of the GoPro and can be much more nimble. Having the support and gyro rotation functions separate might also make it easier to adapt a single gyro kit to multiple camera form factors. With a DSLR perhaps your best bet for support is a tripod collar that mounts near the camera's lengthwise center of gravity, but the wide-angle lenses you'd probably want to use generally aren't made for these. Of course you could always just clamp onto the lens body somehow but that's not really elegant. I imagine there's some sort of pre-existing gidget that would do the trick. I wouldn't try to support the weight by the body and body sizes are too irregular anyway. On the other hand if you can get the camera supported near its center of gravity and spinning freely your gyro rotor could just sit behind it and have some sort of adjustable-finger rotor job for any camera type.
|
|
#
?
Apr 11, 2013 02:27
|
|
|
So would the motor handle the weight of the camera like that very well? wouldn't it be better if the load was on an axle instead with a gear printed on the back of that plate for the motor to drive?
|
|
#
?
Apr 11, 2013 02:37
|
|
|
Snowdens Secret posted:We see the weight of the camera acting perpendicular to the plane of rotation, which is just going to torque up everything, cause drag and stiction and wear. Because the camera mount is far from the center of gravity, vibration is going to be amplified and translated into an arc, very distracting. I was concerned about this, so fitted it up with the D70 last night and in actuality there is poo poo-all drag/stiction. Stepper motors typically run ball bearings on the front and back because they are designed for high axial loads tensioned pulleys and the like. Wear might become a problem, but as an industry standard, practically modular part NEMA 17 stepper motors are readily available and thanks to the Reprap project, cheap as chips. My D70, for reference, is about half again as heavy as the current crop of entry level DSLRs with far more weight hanging off-axis. The 3-axis sensor is on it's way, might be here today. I printed a motor mount last night and wired up the stepper motor to a spare Pololu. Then I accidentally shorted a circuit plugging a jumper into the wrong spot because I was tired. Scratch one stepper driver and one Arduino UNO  Ordered a beefy H-bridge chip to replace the stepper and a new 328P to replace the IC on the Arduino. Also added an Arduino Pro Mini to the order for the first prototype assembly.quote:What I would with the GoPro is take the square shape and slap arc segments on the sides so that the outside shape becomes a circle. You know, this was pretty much the first thing I thought of but I wanted the lens on the axis of rotation and that would mean a big circle (100mm at a rough estimate). If you can design something credible I'd be up for having a go at printing it.
|
|
#
?
Apr 11, 2013 09:09
|
|
|
Police bike pursuit, with music selection (full length GoPro)
Jaz fucked around with this message at 11:28 on Apr 11, 2013 |
|
#
?
Apr 11, 2013 11:24
|
|
|
From here - http://www.klr650.net/forums/showthread.php?t=110552 
|
|
#
?
Apr 11, 2013 15:05
|
|
|
Bridgestone posted:This is normal and not covered under warranty because the 6 month old touring purposed tires have been exposed to below freezing conditions. Well that's the last Bridgestone tire I put on anything ever. Cracking that bad could be a defect and no reason to rule out a whole brand for all makes and models of tire, but that response... wow. Have a Griso: 
|
|
#
?
Apr 11, 2013 15:16
|
|
|
People use BT45s on anything other than little learner bikes? I used them on my ZZR250 and that was mainly because they were cheap. Apparently it's a rear tire mounted to the front, possibly in reverse. meant for smaller bikes than the ST1300. That seems about as smart to me as the yokels who fit car tyres to their bike.
|
|
#
?
Apr 11, 2013 15:47
|
|
|
I've said it before, and I'll say it again: Michelin supremacy
|
|
#
?
Apr 11, 2013 16:09
|
|
|
theperminator posted:People use BT45s on anything other than little learner bikes? I used them on my ZZR250 and that was mainly because they were cheap. That is often done by the same yokels. Using the car tire on the rear is referred to as darkside tires. Going double dark is mounting a car tire on the rear and a rear MC tire to the front. As dumb as all that is - it doesn't explain that sort of cracking. :edit: Video of darkside tire on a ZX-14 https://www.youtube.com/watch?v=gZKhoFbL7Fo
|
|
#
?
Apr 11, 2013 16:22
|
|
|
Jim Silly-Balls posted:I've said it before, and I'll say it again: Michelin supremacy Just go to a different forum. Some of the ones I read have people swearing off Michelins because of the tread de-laminating. In those stories and the bt45 one above I think there is more to the story. These guys in these stories always get emails from the manufacturer but can never take a screenshot of the things. I wouldn't swear off any tire cause of one forum post, especially if you don't know the user's history. edit: Oh he was running a rear on the front? I'd start there. edit2: If you want to swear off Michelins forever http://www.fz6-forum.com/forum/main-lobby-new-member-section/43362-beware-michelin-2cts.html  There was also an even sketchier story where a guy crashed and had a pic of his wrecked bike and a SUV, but I can't find it. nsaP fucked around with this message at 17:48 on Apr 11, 2013 |
|
#
?
Apr 11, 2013 17:26
|
|
|
That thread is disturbing. Tires not meant to be exposed to freezing temperatures? Could that seriously be a thing, or is that just an idiotic customer service guy making stuff up? Sure, not everyone rides in the winter, but almost everyone who doesn't stores their bike in an unheated garage over the winter. Not to mention that the tires undoubtedly sit in unheated warehouses and on cold trucks... And the part a few pages down where he says he posted the photos to the Bridgestone FB page with the Bridgestone rep's comments, and they reported his account for spam...wow. How lovely is that. Bad customer service. I'm not convinced that Bridgestone is evil yet (as nsap says, seems like running your tires backwards wouldn't be very good for them...) but it has made me reconsider whether I should get Spitfires or Roadriders for my other set of wheels. e: some guy in the thread says "the DRZ folks call the Trail Wings "deathwings"." What's that about? Mine seem to work fine. e2: read the whole thread, here's a response from a different Bridgestone rep quote:I wasn't aware of this, we only deal with race product so this must have been going through someone at corporate. From what I read though it sounds like it wasn't warranted because of the how it was used. A rear tire flipped the wrong direction and used on the front of a bike that is really heavy and exceeds the rating of the tire. Tires can "cold crack" if they are below freezing and suffer some kind of impact. I have seen that with our race product but they have to have some kind of impact while they are below freezing they don't just sit there and crack. So I am not sure we are hearing the whole story maybe the guy is just upset how it was handled I am not sure. I don't think this is something to worry about, as I have never seen a tire just sit there and crack. Sagebrush fucked around with this message at 17:49 on Apr 11, 2013 |
|
#
?
Apr 11, 2013 17:43
|
|
|
nsaP posted:
You talking about the one where the guy went through the rear windshield? "That's me with my legs sticking out!"
|
|
#
?
Apr 11, 2013 19:45
|
|
|
nsaP posted:edit2: If you want to swear off Michelins forever http://www.fz6-forum.com/forum/main-lobby-new-member-section/43362-beware-michelin-2cts.html As someone who's about to slap a set of PR3s on his own ride, I'd like to point out that this guy and his horror show are the only publicly documented case of this happening. I forget the details of the SUV dude but his story / pics were real suspicious (I forget why). Meanwhile it's perfectly reasonable to hate Bridgestone for bribing Dorna into making them the MotoGP spec tire.
|
|
#
?
Apr 11, 2013 20:21
|
|
|
Snowdens Secret posted:As someone who's about to slap a set of PR3s on his own ride, I'd like to point out that this guy and his horror show are the only publicly documented case of this happening. As someone who HAS a set of pr3's on his ride I hope you're right. Maybe I can blame the tires on the crash I had last week...
|
|
#
?
Apr 11, 2013 20:50
|
|
|
Bridgestone and Dunlop can both suck it. I've never had anything but bad experiences with them.
|
|
#
?
Apr 11, 2013 20:51
|
|
|
Have we covered every primary manufacturer yet? Here's a news flash people, customer service is iffy at best, there's too many variables and you'll always find someone with a big mouth that wants to tell everyone how lovely an experience they had. (Can you tell I worked customer service in the past yet?) I've like my Battleaxes on my VFR so far, only had chances to canyon carve 2 times unfortunately, but both times I was scraping pegs. The pegs are set so low though I'd have to hold my feet up and let them fold all the way in to hit the absolute tire edge, hah! They've also resisted squaring off pretty well too over the year I've had them mounted while commuting.
|
|
#
?
Apr 11, 2013 21:24
|
|
|
 KX500 and the desert 100 GI Joe jobs fucked around with this message at 01:31 on Apr 12, 2013 |
|
#
?
Apr 12, 2013 01:04
|
|
|
Jim Silly-Balls posted:Bridgestone and Dunlop can both suck it. I've never had anything but bad experiences with them.
|
|
#
?
Apr 12, 2013 01:09
|
|
|
nsaP posted:edit2: If you want to swear off Michelins forever http://www.fz6-forum.com/forum/main-lobby-new-member-section/43362-beware-michelin-2cts.html  I feel for the guy but I seriously doubt it was spontaneous. I'd put money that he ran over a nail or something, lost a poo poo ton of pressure and the failure took away the evidence. I think that's far more likely than it just up and melted out of the blue for no reason.
|
|
#
?
Apr 12, 2013 02:09
|
|
|
This is cool -- a bike cop chasing down a speeding car, filmed from the bike cop's POV. You don't see that side very often. https://www.youtube.com/watch?v=23i-BvSZqzU VVV oh you know what I meant. You don't get to see (gopro videos from motorcycle cops) as often as you get to see (gopro videos of motorcyclists getting arrested or running from the police). He seems like a pretty good rider, and safe too. Lots of blind spot checks. Sagebrush fucked around with this message at 06:11 on Apr 12, 2013 |
|
#
?
Apr 12, 2013 04:51
|
|
|
Sagebrush posted:This is cool -- a bike cop chasing down a speeding car, filmed from the bike cop's POV. You don't see that side very often. Ooooh, can they make a TV show purely from this perspective? 
kloa fucked around with this message at 06:08 on Apr 12, 2013 |
|
#
?
Apr 12, 2013 05:38
|
|
|
Sagebrush posted:This is cool -- a bike cop chasing down a speeding car, filmed from the bike cop's POV. You don't see that side very often. This is very cool. What sort of bike is that? The visor appears to lift up with speed which is a pretty nifty feature. Also bare forearms
|
|
#
?
Apr 12, 2013 06:06
|
|
|
That we be so much fun, until the stop when they could come out guns blazing and you having very little cover. Also how did he stall the bike at 3:40ish?
|
|
#
?
Apr 12, 2013 06:10
|
|
|
Looked like killed the bike with the key. Wonder why he didn't use the killswitch.
|
|
#
?
Apr 12, 2013 06:14
|
|
|
I was thinking more along the lines of: how is a bike supposed to 'stop' a car? What stops the guy from just ramming the cop and laughing?
|
|
#
?
Apr 12, 2013 06:16
|
|
|
|
| # ? Jun 11, 2024 22:39 |
|
|
^^^^^ I think that's why he hangs back so far through most of the video. Looks like he could easily catch up, given the performance when he gets on the freeway, but it wouldn't be safe. z3n: Might be police procedure, so that after he leaves the bike in the road and runs a quarter mile to catch the guy, no random passerby can just hop on and take it for a joyride.
|
|
#
?
Apr 12, 2013 06:16
|
|