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Hot Spots
I have been taking pictures of aircraft flying over my house, and I have noticed that there are bright 'hot spots' or flares on the aircraft if they catch the sun in a particular way. My UV filter does not help..

Can anyone advise me how to get rid of these hot spots so that the picture of the aircraft is evenly lit?..

Comments (12)

In fact your UV filter may be the problem.Start by taking it off..

Then if you still have the problem try posting a picture and we'll go from there.A member of the rabble in good standing...

Comment #1

Thanks LM, can you tell me why the UV filter is the problem? It would be the last thing I would have thought of...

Comment #2

Because the typical UV filter is cheap glass and uncoated. Thus a bright reflection from the airplane gets translated into repeated reflections from the front element of the lens and the back of the UV filter with resulting "hot spot".

Now, you may have bought a really nice one, multicoated, optical glass etc. In which case it probably won't be the problem. Then we move on..

Really a picture would tell me a lot more.A member of the rabble in good standing...

Comment #3

As soon as I figure out how/where to post it. I don't have the images on a website, only on my HDD. Sorry if I sound stupid, but it seems that unless I can include a URL, there is no way to show my pic...

Comment #4

Pictures must be posted to the web to be seen here..

I'd suggest a Flicker account. It's free and relatively painless to upload to. And when you have questions about how your camera is working or a particular issue that's photo related it will be very helpful.A member of the rabble in good standing...

Comment #5

Dear LM1, hopefully this takes you to the picture. I know it's not the proper angle, it's just the first days of having a new camera and shooting everything in sight. But I do try to shoot airplanes, so this is an important issue. The hot spots in question are on the fuselage, aft of the wings, under the turbines..

Thank you so much for your help,.

Joe..

Comment #6

No picture.Just highlight and copy the .jpg link and paste it into your message.A member of the rabble in good standing...

Comment #7

Trying again.....

Image control:Zoom outZoom 100%Zoom inExpand AllOpen in new window.

Might help..

Comment #8

Those hot spots are sun reflections off of the metal of the body..

They are purple because of either chromatic abberation of the lens or because of the jpeg processor in your camera where one or more channels saturate before the green channel. I favor chormatic abberation for the purple color..

Now, good news. It's not your UV filter. Although it still might be better with it off..

The bad news. There is little that you can do about them. Except a little photoediting. Here is a quick fix, I could do better with more effort..

Image control:Zoom outZoom 100%Zoom inExpand AllOpen in new window.

My flicker page http://www.flickr.com/photos/8790142@N02/A member of the rabble in good standing...

Comment #9

Thanks LM. I am not sure what chromatic abberation means. The camera is a Canon XTi, with a Canon 70 - 300 lens. I have a lot of faith in the accuracy of Canon lenses..

It seems like photoshopping is what I have to do. I will certainly experiment with the UV filter off. Thank you for your time and advice...

Comment #10

Joseph7457 wrote:.

Thanks LM. I am not sure what chromatic abberation means. The camerais a Canon XTi, with a Canon 70 - 300 lens. I have a lot of faith inthe accuracy of Canon lenses.It seems like photoshopping is what I have to do. I will certainlyexperiment with the UV filter off. Thank you for your time and advice..

Ask over on the Canon forum about the lens. Chromatic Abberation is always a function of the lens. It's what gives the hot spot a purple color. Even without CA the hot spot will still be there, just not purple in color..

Some lenses have more than others. There may be either a better choice in lenses or often the CA will be less at certain f-stops than others with that particular lens. People over there will know more as I don't shoot a Canon..

And now you can show them the problem and get a lot of other, possibly even useful, suggestions..

Good luck, and that is a nice shot.A member of the rabble in good standing...

Comment #11

The easy way to get rid of the hot spots is to shoot from a differant angle so the sun doesn't reflect straight back into your lense, It looks like you took the shot in late afternoon, try it earlier in the day, I shot some pic's just like that one last month in Houston,had no problem... I took it about 9 amI used a Canon 20D & the 70-300 Canon lense.

Check my pic here> http://www.dreamstime.com/passenger-airplanes-image2955641.

Also check out >http://www.prophoto1.com..

Comment #12


This question was taken from a support group/message board and re-posted here so others can learn from it.

 

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