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05/16/2008 10:15:47 PM · #1 |
I am planning to buy a Nikon AF Nikkor 50mm f/1.8D lens in the next week. I don't know a great deal about F stops yet, I see there is a 2.8 28mm lens also. As well as a 50mm f/1.4, with a wide price difference between them.
I would be most thankful if someone owning any lens able to do f/1.4 could take three identical shots of a white wall or object, at 1.4, 1.8, and 2.8 so I can visually SEE the difference it makes. No need to demo depth of field or anything else.
Thanks so much, I hope someone can help *crosses fingers*
EDIT:
Further, if possible, I would be most super duper thankful for this too, if someone could take a photo where the scene with f2.8 is black, showing how much brighter the scene appears as 1.8 and 1.4, thanks super much flying monkey handles!
Message edited by author 2008-05-16 22:21:57. |
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05/16/2008 10:31:06 PM · #2 |
| You can do this yourself... f/1.4 is two stops brighter than f/2.8, or four stops brighter than f/5.6. Shoot your subject at f/5.6, then drop your shutter speed by 4x, and you've approximated f/2.8. Now drop it by 4x again, and you've approximated f/1.4. So if you started at 1/160s @ f/5.6, then shot at 1/40s @ f/5.6, it would look as bright as if your's shot at 1/160s @ f/2.8. Shoot at 1/10s @ f/5.6 and it will look as bright as if you shot at 1/160 @ f/1.4. |
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05/16/2008 10:33:37 PM · #3 |
Oh cool, thank you so much, that rocks!!!
How much do I need to drop it to get f/1.8? |
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05/16/2008 11:21:49 PM · #4 |
| I think I figured it out, since my shutter is in 1/3 stop mode, as is my aperture, then for each click up on one, decreasing the other by 1 click is the same. So, in 1/3 mode, going from f/3.5 to f/1.8 is decreasing my shutter speed 6 clicks, from 200 to 50. Correct? |
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