User Comments
Spectacular! Anyone physics-minded enough to know what dictates the number of apparent sunbeams? (i.e 10 here)
fhuaran - 22/Feb/09
What a great question. I have no idea. I checked my old photos, and this camera always seems to do 10, but other cameras I have used do different numbers, and this recent photo from dixmarra on UKC has 14. http://www.ukclimbing.com/images/dbpage.html?id=109485
So perhaps it is to do with the lens?
Mike421 - 22/Feb/09
So perhaps it is to do with the lens?
I think it's the number of angles between the components of your apeture.
Adam Booth - 22/Feb/09
Lovely stuff, that's you next year's Christmas Card sorted then!
Chris
Chris Craggs - 22/Feb/09
Chris
Yep - very nice - I guess the local tourist office would like a copy too! ;-)
Anyway - physics - I *believe* Adam Booth has it right - this camera has a 5-bladed aperture (i.e. the aperture when stopped down is an approximate pentagon).
PontiusPirate - 22/Feb/09
Anyway - physics - I *believe* Adam Booth has it right - this camera has a 5-bladed aperture (i.e. the aperture when stopped down is an approximate pentagon).
stunning shot.
On the subject of sun stars, you get one on the point of intersection of 2 aperture blades, and one opposite it, so for lenses with an odd number of blades, you get twice that number of legs on the star, for lenses with an even number of blades, you get that number (as they line up with each other).
Hense why 9 blade lenses make such lovely stars
pottsworth - 26/Feb/09
On the subject of sun stars, you get one on the point of intersection of 2 aperture blades, and one opposite it, so for lenses with an odd number of blades, you get twice that number of legs on the star, for lenses with an even number of blades, you get that number (as they line up with each other).
Hense why 9 blade lenses make such lovely stars
way to go, pottsworth!
jtree03 - 27/Feb/09