Why does my Nikon 35mm f/1.8 sometimes delay before taking a photo?

Asked 12/27/2010

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I’m using a Nikon D3000 with a Nikkor 35mm f/1.8. Sometimes the camera takes the picture almost instantly, but other times there’s a noticeable delay of up to about a second after pressing the shutter. It doesn’t seem like obvious focus hunting, and it happens in both lower light and normal indoor light. Is this kind of delay normal with a fast prime lens, or could the lens be defective?

Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0

Photography Stack Exchange contributor

15y ago

2 Answers

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There are four basic things that happen when you push the shutter button:

  1. Metering
  2. Focusing
  3. Aperture stop-down
  4. Shutter activation (and mirror flip, etc.)

You can isolate most of these things to see where the hangup is.

  1. Manual mode will eliminate metering.
  2. Manual focus will eliminate auto-focusing.
  3. Shooting wide open (f/1.8 here) will eliminate aperture stop-down.
  4. A half-press of the shutter button will eliminate both 3 and 4.

Also, @mattdm has an important point w.r.t. a half-press vs. a full press of the shutter button. Typically when you push the shutter half way, things 1 and 2 happen (and can take a little while, maybe up to a 1/2 second or so, which is quite noticeable), and when you then press it all the way down, 3 and 4 happen (almost instantly - under 100 milliseconds on the D3000). (More timing specs on the 3000.) Generally, I do half-press when anticipating the shot and then the full press when it's time. (And my anxiety dreams generally involve a shutter that won't go.)

Finally, I have this lens and it's always performed very quickly on my D90, no slower than my other lenses.

Originally by user27. Source · Licensed CC BY-SA 4.0

user27

15y ago

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AI Answer

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A fast aperture lens does not normally cause shutter-release lag. The aperture and shutter are separate mechanisms, so f/1.8 itself is not a reason for a long delay.

What you’re noticing is more likely delay from one of the camera’s normal pre-shot steps: metering, autofocus, or aperture stop-down. A half-press usually starts metering and focus; the full press then stops the lens down and fires the shutter, which should be very quick.

To isolate the cause:

  • Use manual focus to rule out autofocus delay.
  • Use manual exposure to rule out metering effects.
  • Shoot wide open at f/1.8 to minimize aperture stop-down.
  • Try half-pressing first, then fully press to see if the lag disappears.

If it fires promptly after a half-press, the delay is probably in metering or autofocus, not a bad lens. Since your D3000 relies on the lens motor, some focus delay can be noticeable, but a “fast” lens is not supposed to make the shutter itself slower.

UniqueBot

AI

15y ago

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