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09/28/2004 10:35:25 PM · #1 |
Yes, it is true.
Add-on IS |
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09/28/2004 10:58:47 PM · #2 |
Originally posted by Spazmo99:
Yes, it is true.
Add-on IS |
And it's only a measly $1950 for the kit big enough for the dRebel, 10d etc...
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09/28/2004 11:35:23 PM · #3 |
I think I will buy the IS first.
LOL
KS-8
GYRO KIT
$3,500
KS-6
GYRO KIT
$2,600
KS-4
GYRO KIT
$1,950
KS-2
GYRO KIT
$1,200
KB-2
STABILE EYES (BINOC)
$895
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09/29/2004 11:05:40 AM · #4 |
Originally posted by TooCool:
Originally posted by Spazmo99:
Yes, it is true.
Add-on IS |
And it's only a measly $1950 for the kit big enough for the dRebel, 10d etc... |
I never said it was cheap, but it will work with any lens/camera combo, not just Nikon or Canon (or the one Sigma) lenses with IS.
If you consider the additional cost of adding IS to lenses, it would not take long to offset that $1950 if you have need for IS. The IS version of the 70-200 f2.8 adds ~ $600 over the cost of the non-IS version. This could be valuable to someone with a collection of pre-IS or non-IS glass. They could buy one unit and not have to buy all new lenses to get image stabilization. |
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09/29/2004 11:22:01 AM · #5 |
I'll just buy the new Minolta DSLR with IS built into the body, thanks!
//www.dpreview.com/news/0409/04091504km7d.asp |
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09/29/2004 11:34:26 AM · #6 |
That is a good option too, if you are looking to buy into a whole system. |
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09/29/2004 11:40:24 AM · #7 |
The Ken-Lab gyros are awesome, and compensate for much more vibration and shake than any built-in IS or VR system ever could. They are primarily used when shooting from moving vehicles, such as helicopters, planes, cars, etc. to achieve very clear images: photographic, video or film.
Take a look at this sample video. About half-way through, you'll see how much vibration there is in the helicopter's yolk and instrument panel, but notice how stable the image captured by the camera is...
Message edited by author 2004-09-29 11:40:39. |
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09/29/2004 11:44:55 AM · #8 |
Originally posted by EddyG:
The Ken-Lab gyros are awesome, and compensate for much more vibration and shake than any built-in IS or VR system ever could. They are primarily used when shooting from moving vehicles, such as helicopters, planes, cars, etc. to achieve very clear images: photographic, video or film.
Take a look at this sample video. About half-way through, you'll see how much vibration there is in the helicopter's yolk and instrument panel, but notice how stable the image captured by the camera is... |
Have you used one Eddy? |
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09/29/2004 11:46:01 AM · #9 |
| Looks kinda bulky to me and probably adds a lot to the total weight you have to carry around. You have to carry around the stablizer AND battery pack? Not sure this is really a practicle option for everyday shooting. |
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09/29/2004 12:28:29 PM · #10 |
Seems like a 'nice to have' accessory, but the price is daunting for the hobbyist.
For the technically skilled, one could pretty easily be homemade using two brushless DC motors (about $30 each).
Just mount the two motors at right angles to one another on a bracket that has a 1/4-20 pan mount for the camera.
But it is heavy, about three pounds not including a 12 volt rechargeable battery. Not for casual use!! |
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09/29/2004 12:47:59 PM · #11 |
Originally posted by ElGordo:
For the technically skilled, one could pretty easily be homemade using two brushless DC motors (about $30 each).
Just mount the two motors at right angles to one another on a bracket that has a 1/4-20 pan mount for the camera.
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To get a useful gyroscopic effect, you would need to make sure the motors are dynamically balanced along with any flywheel you use for added mass. Otherwise, you will likely cause more vibration than you eliminate. |
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09/29/2004 01:10:16 PM · #12 |
The motors should be very smooth running with ball bearings, that is why brushless DC motors are preferred.
The motor armature has sufficient mass without adding an external flywheel. Very high speed DC motors with brushes tend to be less smooth running but can be used if their vibration is low enough to be imperceptible when running.
High RPM motors are more useful because their angular momentum is greater for a given mass. Obviously, the motor size and power requirements are of concern to be useful in this application. For very small, lightweight cameras the assembly could be made smaller and still be very effective.
Industrial surplus supply companies are a good source of high quality motors at bargain prices. If you decide to use a brushless DC motor, be sure it includes integrated electronics or controller to generate the multiphase current required to run the motor.
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09/29/2004 01:18:44 PM · #13 |
Originally posted by Spazmo99:
Have you used one Eddy? |
No, haven't had the opportunity to try one out, although I would jump at the chance if one presented itself. My info is based on reviews I've read and conversation with a photographer who specializes in aerial photography who swears by his. |
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09/29/2004 01:39:27 PM · #14 |
Originally posted by ElGordo:
The motors should be very smooth running with ball bearings, that is why brushless DC motors are preferred.
The motor armature has sufficient mass without adding an external flywheel. Very high speed DC motors with brushes tend to be less smooth running but can be used if their vibration is low enough to be imperceptible when running.
High RPM motors are more useful because their angular momentum is greater for a given mass. Obviously, the motor size and power requirements are of concern to be useful in this application. For very small, lightweight cameras the assembly could be made smaller and still be very effective.
Industrial surplus supply companies are a good source of high quality motors at bargain prices. If you decide to use a brushless DC motor, be sure it includes integrated electronics or controller to generate the multiphase current required to run the motor. |
Just how smooth is smooth enough is the question. Motor speed is another, gyros this size usually spin their flywheels at about 20-25,000 RPM. if you don't have a flywheel, you will need to spin even faster to get the same effect. You would also want to make sure that the motor control had some kind of "smooth start". You don't want the motor to accelerate to ~20,000 RPM at maximum rate,especially with your camera attached, it could jerk the camera out of your hand. |
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