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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 19 Mar 2013 (Tuesday) 15:59
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Silly question

 
gv0861
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Mar 19, 2013 15:59 |  #1

Ok, First of all these are the types of question that pop into my head in the middle of the night. Don't ask me why, but it is what is. :confused:
Anyway, I have a 70-200 mm f/4 L non-IS that I use pretty much all of the time with the lens hood on. My question is: does the hood prevent some light from reaching the lens and therefore affecting the amount of light needed to take a pic. In other words, if I had the hood off, would I be able to take pictures in somewhat less light?
Thanks for your thoughts.


Looking for light in all the right places.

  
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Z0RR0
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Mar 19, 2013 16:03 |  #2

It does prevent light from hitting the lens, in the way that it prevents lens flare.
However, removing it won't make more light magically appear and help you get that shot.

So your answer is no it doesn't affect it, but it does a little, but not in that way.


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CanongLass
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Mar 19, 2013 16:34 |  #3

If the light source is from the sides (can be top or bottom also) the light hitting the lens at an angle will distort the image (lens flare). The purpose of the hood is to eliminate the chance of flare.

If the light source is behind you or the subject then using the hood or removing it should result in the same picture.




  
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adza77
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Mar 19, 2013 17:37 |  #4

As the others have said. It's not like a filter that cuts the amount of light of your subject / composition from reaching the sensor.

It is supposed to cut down any other light that isn't in your composition that will 'negatively' affect your image such as sunflare or washout.

(I quote 'negatively' as some people may want those effects from time to time).


Nearly all men can stand adversity, but if you want to test a man's character, give him power. - Abraham Lincoln

  
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gv0861
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Mar 19, 2013 21:09 as a reply to  @ adza77's post |  #5

Thanks everyone for your input. Clarifies things for me.


Looking for light in all the right places.

  
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Silly question
FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
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