bicycle helmet quality image
John
I would like to know how much is too much on a all-mountain/single track bicycle helmet and how much is reasonable. Also, any recommendations, the main helmet that I was looking at was the Bontrager Lithos which is $129 and I was wondering if this is a bit outlandish for a helmet or if that is what's necessary for a quality helmet?
Answer
In the U.S. every helmet regardless of price is tested to the same minimum standards. As the helmet gets more expensive the helmet gets better, lighter, and stronger.
$129 is a LOT cheaper than brain surgery or even a trip to the hospital from your helmet shattering on the pavement.
EDIT: OK, I guess I'll have to go into a little more detail. As I said before, all helmets must meet minimum requirements. The differences with better helmets, however, are staggering. First, cheaper helmets (asm entioned before) are good for ONE impact. That does not take into consideration that almost every accident involves more than one impact as you bounce off the road. That is part of the CPSC regulation.
Good helmets have internal webbing to allow the helmet to stay together as your head bounces off the road as cheaper ones come off your head. Cheap helmets break apart and fall away leaving your head exposed after the first hit.
Good helmets fit the head much more securely without using low durometer pads stuck to the inside, again making the safety fetaures of the helmet much more effective. Most decent helmets also have less abrasive straps and pinch-free buckles along with a much more effective and slip-free situation.
Good helmets also have a positive placing system of some sort to passively place the helmet in the correct position on your head. Again, VERY important feature.
Soooo, if all you want is minimum protection- if you don't particularly need your head for anything special- than a $25 helmet is great. On the other hand, if you tend to use your head (or anything that might be stored inside it) occasionally, that $129 is pretty cheap insurance.
In the U.S. every helmet regardless of price is tested to the same minimum standards. As the helmet gets more expensive the helmet gets better, lighter, and stronger.
$129 is a LOT cheaper than brain surgery or even a trip to the hospital from your helmet shattering on the pavement.
EDIT: OK, I guess I'll have to go into a little more detail. As I said before, all helmets must meet minimum requirements. The differences with better helmets, however, are staggering. First, cheaper helmets (asm entioned before) are good for ONE impact. That does not take into consideration that almost every accident involves more than one impact as you bounce off the road. That is part of the CPSC regulation.
Good helmets have internal webbing to allow the helmet to stay together as your head bounces off the road as cheaper ones come off your head. Cheap helmets break apart and fall away leaving your head exposed after the first hit.
Good helmets fit the head much more securely without using low durometer pads stuck to the inside, again making the safety fetaures of the helmet much more effective. Most decent helmets also have less abrasive straps and pinch-free buckles along with a much more effective and slip-free situation.
Good helmets also have a positive placing system of some sort to passively place the helmet in the correct position on your head. Again, VERY important feature.
Soooo, if all you want is minimum protection- if you don't particularly need your head for anything special- than a $25 helmet is great. On the other hand, if you tend to use your head (or anything that might be stored inside it) occasionally, that $129 is pretty cheap insurance.
what distance should the lenses be around if making a homemade 3D camera?
Q. I am thinking of making my own 3D camera, and will use red/blue glasses. I am going to buy two Muvi Micro Clone type camera, and want to know what distance apart the two lenses should be for the best quality video?
My plan is to use the camera as an action camera, to record 3D cycling videos mounted on a bicycle helmet.
Anyone got any advice :) Thanks!!
My plan is to use the camera as an action camera, to record 3D cycling videos mounted on a bicycle helmet.
Anyone got any advice :) Thanks!!
Answer
I have to respectfully disagree with lare on that one - you can do 3D without synchronised shutters. Have a look at Suzi Perry's 3D video, recorded for The Gadget Show. This was shot with a pair of Canon 550Ds. I seem to remember the program mentioned all sorts of potential problems, but the results were much better than expected. From what I remember, the distance between the lenses wasn't critical, but they had to be aligned so that the images seemed to converge at the right distance. I don't remember what the right distance was though - sorry!
I have to respectfully disagree with lare on that one - you can do 3D without synchronised shutters. Have a look at Suzi Perry's 3D video, recorded for The Gadget Show. This was shot with a pair of Canon 550Ds. I seem to remember the program mentioned all sorts of potential problems, but the results were much better than expected. From what I remember, the distance between the lenses wasn't critical, but they had to be aligned so that the images seemed to converge at the right distance. I don't remember what the right distance was though - sorry!
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