but they never seem to quite remove it, IME.
They do, if you get it right.
The link leads to specialist app cameras, as I said, there are some out there and prob90 soon will be for GoPro, etc. Just not yet.
In any case, these are two totally different issues, not linked in any way.
Unfortunately the only solution that actually works fully is a shutter speed slower than about 1/100 (the actual figure is RPM dependent).
I find 1/250 best in my plane, with a RPM between 2300 and 2400. I used my Canon 70D which although isnt a Camcorder (and you certainyl wouldnt want to gaffa tape it to your wing like a GoPro), the movie quality is outstanding. It does however need an industrial strength clip on the instrument panel to secure it.
They do, if you get it right.
How?
I can see that by putting more and more of them on you might eventually slow it down enough to work.
It does however need an industrial strength clip on the instrument panel to secure it.
I used this. Paradoxically a lightweight camera would be harder to anti-vib mount because has less mass to create the “lowpass filter” with a given level of mount elasticity.
How?
I can see that by putting more and more of them on you might eventually slow it down enough to work.
They come in different strengths
They come in different strengths
Yes, and I wondered what strength you used. For my Canon I have a variable ND filter, between 2 and 8 stops (for slow shutter daylight shots). I would assume 2 stop ND filter here?
All a ND filter does is let less light through to the sensor, and thats why there is an effective shutter speed reduction. So for GoPro’s and maybe these Garmin’s, are the shutter speeds not adjustable to something like 1/250, therefore requiring a ND filter.
The only way to modulate the shutter speed on a GoPro is via an ND filter. There is no hard and fast rule as to which one to use – it obviously depends on the ambient light. You can also use a polarizer, possibly even in combo with an ND. The best is to experiment a little while on the ground and see what gives you best results. Unfortunately there is no variable ND for the GoPro (you’d need a dedicated housing for it). I recently did some air-to-air work (but with pro cine cameras) and found to get a good prop movement (IOW create a prop disk that moves, w/o freezing the prop blades) I needed to shoot at about 1/125th – 1/160th.
The NFlight filters work very well with GoPro cameras. For my JVC video camera I use a shutter speed of 1/100.
Declared interest – I sell the Nflight filters so I would say they work, wouldn’t I 
Has anybody used PolarPro’s glass filter instead of the NFlight’s plastic one?
I know a couple of people who have modified the casing to accept a standard camera filter – but then of course the case is no longer waterproof
I use a Panasonic Lumix FT2 compact digital in movie mode – it does about 10 minutes then has to be restarted. It’s cold resistant. The Fuji I previously used would not work in a cold cockpit. I tried a Canon HG10 cine camera – it didn’t have the scicle effect, but shut down due to vibration, and produced weird effects at times – I think the image stabilation settled on the prop at some steady rev value.
