17 hours ago
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Re: Low light focussing with 70-200 2.8
In reply to mfouks,
6 months ago
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mfouks wrote:
I just got this lens a couple of weeks ago to use with my D800. I was shooting with it in North Carolina and had no trouble even at dusk. However, I was shooting in basement the other night with two modelling lights on (low power) and the lens could rarely find the focus. Then I switched to the 24-120 F 4.0 lens-pretty much the same settings (F8 or F11, 1/200 shutter speed) and and light conditions and it found focus every time. I'm just wondering why the 70-200 had so much trouble or was I doing something wrong or is there a setting I need to change.
Thanks,
Marsha
How far was the subject you were trying to focus on, and which focus point were you using? I find with my 70-200VRII if I'm using the outer focus points in low light to focus on a relatively close subject (~5ft) with the lens stopped down, the camera may hunt a while before acquiring focus. This doesn't seem to be a problem with other lenses, so I'm guessing it's a combination of low light, small aperture and shooting close to the minimum focus distance.
Also I think I recall reading that the cross-type sensors on the D800 operate best at f/8 or wider.
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@AT
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