Forum > Model and Miniature Photography
Aperture
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Fitz:
These two photos were taken at the same time, with identical lighting and zoom, and both from a tripod and using the camera's timer to eliminate camera-shake. Both were focused on the same point on the model. The only thing that changed between them was the lens aperture.
On the left, the aperture was f22, on the right, f5.6.
Each of them has their benefits.
The smaller aperture (f22) increases the image's depth of field, so every part of the model is in focus. The background texture is also better defined. The exposure time is long, so a tripod is absolutely necessary.
the larger aperture (f5.6) reduces the depth of field, so the background is significantly out of focus — this has the benefit of separating the model from its background, and the fact that his left hand is also slightly out of focus gives the figure a bit more of a sense of depth. Exposure time was significantly shorter, but still long enough to make tripod use advisable.
The miniature is from Reaper; I think it's a swamp-troll or something.
Ragnar:
I struggle to remember this stuff so thanks for this.
Doesn't lengthening the aperture time increase the amount of light coming in thereby over exposing the image?
Fitz:
--- Quote from: Ragnar on June 27, 2020, 08:05:01 AM ---Doesn't lengthening the aperture time increase the amount of light coming in thereby over exposing the image?
--- End quote ---
No, because the smaller aperture allows less light in to begin with — to get the same amount of light overall, with a smaller aperture (that's a bigger f-stop number) you have to increase the exposure time, while with a larger aperture (a smaller f-stop number) you have to decrease exposure time.
It's a balancing act between aperture and exposure. It's mostly handled automatically these days, though any decent camera will allow you to manually adjust the aperture/exposure balance.
Ragnar:
Thanks for the detailed reply.
Thargor:
Also worth remembering that the depth of field is affected by the distance between the camera and subject... the closer you are the shallower the depth of field.
There is a formula for it that I've never bothered to learn, but something to think about when photographing groups of figures.
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