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What's with these spikes out of the sun

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f@tony says:

All the into-the-sun photos I take with my D70 have a sharp point of white top and bottom like this picture regardless of the lens used
[http://www.flickr.com/photos/fatony/3754720506/]
Even when the sun is partially blocked by snow spray that point still is sticking out the bottom.
[http://www.flickr.com/photos/fatony/3756754982/]

Do you guys know what causes this and how I can fix it?
Posted at 6:55PM, 25 July 2009 PDT ( permalink )

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fotosniper  Pro User  says:

its blooming. the light is refracting off the high pass filter. closing down might help, but its a characteristic of the camera. embrace it. its a part of the art.
Posted 8 months ago. ( permalink )

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f@tony says:

Yeah, I love the pattern it gives off but of the 6 rays coming off the two pointing up and down have this white spike in them, where as the ones out the sides gradually change from white to the rays.

If you open the full picture you can see a bit clearer what I mean.
Originally posted 8 months ago. ( permalink )
f@tony edited this topic 8 months ago.

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rikj  Pro User  says:

Were they both taken with the same lens, and what was it?
Posted 8 months ago. ( permalink )

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fotosniper  Pro User  says:

i know fatony, its blooming on the sensor, the other spikes are light being bent around the apeture blades. a totaly diffrent phenom. the blooming occors on the sensor surface and closing down might help depending on the exposure. by closiing down you limit the amount of light the sun is hiiting on that one spot and therefor reduce blooming. think of it like when you are filling an ice tray. each ice hole is like a photosite. when you put to much water it starts to spill into the next hole. same thing.
Posted 8 months ago. ( permalink )

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f@tony says:

The lens is a 12-24 Sigma but it seems to occur with different lenses as well.

Thanks for the analogy fotosniper it made it a lot easier to understand. Now from taking a few photos I think I've figured out whats happening. The size of the spikes are related to the aperture (smaller aperture makes smaller spikes though the top photo is already at the smallest aperture). The exposure of the picture is affecting the size of the bloom from the sun. Lower exposure makes the bloom smaller and by comparison the spikes bigger. Higher exposure makes the bloom bigger till it eventually covers the spikes which, remain the same size.

I imagine that everyone's cameras has those spikes as well but they are much smaller so a tiny bloom will cover them completely.
I guess mine is just a bit older or something so those spikes are bigger by comparison. :)

*when i say spikes i'm still talking about the two vertical highlights and not the 6 rays coming out caused by the aperture blades.
Posted 8 months ago. ( permalink )

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fotosniper  Pro User  says:

the d70 sensor had a blooming isssue.
Posted 8 months ago. ( permalink )

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fotosniper  Pro User  says:

www.flickr.com/groups/d70/discuss/72157604029087060/?sear...
Posted 8 months ago. ( permalink )

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uvegrengroez says:

I can't see anymore f@tony's pics, but here in the previous post we have the direct result of the D70's super shutter's speed.

It's the marvelous 1/8000, or the electronic shutter, much acclaimed in the D70.

More: actually the sensor is exposed longer than the time recorded in exif, so the CCD chargings escalates to the point that lots of pixels on the overexposed area and in the immediate surroundings get supersaturated - so there goes your pic away!

As there is no camera that can expose both Sun and any other subject illuminated by the Sun on this planet, you will always will get this blooming on a D70/s.

The 1/8000 is only useful in studio, never in direct bright sun.
Step down to a more mechanical speed (1/4000 is given as mechanical in specs), use smaller aperture or ND filters.
Or simply avoid such shiny thing like sun next to your subjects... :)

D80 and D90 dropped these speeds altogether.
Posted 3 months ago. ( permalink )

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