stop down !
Oct 15, 2012 05:31:27 #
2th
Loc: Tehran
what is stop-down ? does it mean that when an aperture let,s say 5.6 is needed I should use F8 or what ? Thanks in advance ! Dr. Farzin
Oct 15, 2012 05:34:33 #
2th wrote:
what is stop-down ? does it mean that when an aperture let,s say 5.6 is needed I should use F8 or what ? Thanks in advance ! Dr. Farzin
Stopping down means reducing the size of your lens aperture, ie going from f5.6 to f8 or f11 or f16 and so on.
Oct 15, 2012 12:41:22 #
2th
Loc: Tehran
So Altheman does it means all good lenses on their widest opening are not that good .and should be stiooed down ?
Oct 15, 2012 16:30:48 #
I use whatever aperture I need to get the shot.
(I use the good lenses: 24-70 2.8, 70-200 2.8, primes)
Typically, the sharpest aperture is about 2 stops down from wide open- that will vary a little from lens to lens. If I want shallow depth of field, I don't close down as much- (sometimes I use it wide open), and if I want more depth of field, I close down more. Some will claim that diffraction will soften the image. Technically, that's true, but if I need the depth of field, I stop down. A little diffraction is better than out of focus. The better lenses will show less image degradation.
I promise you, the sky will not fall.
(I use the good lenses: 24-70 2.8, 70-200 2.8, primes)
Typically, the sharpest aperture is about 2 stops down from wide open- that will vary a little from lens to lens. If I want shallow depth of field, I don't close down as much- (sometimes I use it wide open), and if I want more depth of field, I close down more. Some will claim that diffraction will soften the image. Technically, that's true, but if I need the depth of field, I stop down. A little diffraction is better than out of focus. The better lenses will show less image degradation.
I promise you, the sky will not fall.
Oct 16, 2012 06:19:43 #
2th wrote:
So Altheman does it means all good lenses on their widest opening are not that good .and should be stiooed down ?
I'm with Goofy. Yes all lenses are better not at their widest but sometimes you have to to get the shot. Otherwise what is the point of a f/1.4, f1.8 or an f/2.8
Oct 16, 2012 18:30:27 #
This is a question not a reply. Lately all my photos have been very light. I set it to manual and make sure that it is a proper exposure but when I bring it home and upload they are all very light. how can I correct this.
Oct 16, 2012 20:27:11 #
Believe it of not - check your battery(s) - your meter could be not getting enough juice! Did you dial in a constant amount of overexposure? It's in that manual Somewhere !!
Oct 16, 2012 20:55:29 #
rustyfazul wrote:
This is a question not a reply. Lately all my photos have been very light. I set it to manual and make sure that it is a proper exposure but when I bring it home and upload they are all very light. how can I correct this.
Unless you really, really know what you are doing, use aperture or shutter priority and let the camera pick the other. The camera is probably better than 99% of us.
Oct 16, 2012 21:15:44 #
jackm1943 wrote:
Sadly, the anthem of the digital generation.Unless you really, really know what you are doing, use aperture or shutter priority and let the camera pick the other. The camera is probably better than 99% of us.
Oct 16, 2012 21:35:29 #
Nikonian72 wrote:
jackm1943 wrote:
Sadly, the anthem of the digital generation.Unless you really, really know what you are doing, use aperture or shutter priority and let the camera pick the other. The camera is probably better than 99% of us.
Hi Nikonian, I still shoot medium and large format film, so get to use light meters and manual settings plenty. But for digital...the cameras are just so damned good today...
Oct 16, 2012 22:22:57 #
2th wrote:
what is stop-down ? does it mean that when an aperture let,s say 5.6 is needed I should use F8 or what ? Thanks in advance ! Dr. Farzin
Clever screen name, Doc. :thumbup:
Aug 26, 2013 14:17:38 #
Aug 26, 2013 16:07:34 #
2th wrote:
So Altheman does it means all good lenses on their widest opening are not that good .and should be stiooed down ?
2th, some lenses are very sharp wide open. Though they do benefit from stopping down, it's such a small amount that they are routinely used wide open. An example are the Canon super telephoto lenses and a few others.
Also, even if sharp wide open, big aperture lenses tend to vignette, but that easily corrected in post, or by stopping down a bit.
Also, most lenses are pretty sharp in the center, but get sharper in the corners when stopping down. SS
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