Serene Life

by garik

submit your photo


Hall of Fame
View past winners from this year

Please participate in Meta
and help us grow.

Tag Info

New answers tagged

1

Maybe your reverse motor is stuck in the helix / bent plastic path. You need to push it to adjust. http://www.fotomozaic.ro/artikel.php?idstory=225&s=1 The motor has weak, broken gears.


1

Regarding "always wastes huge amount of time", this is not unlike many compact cameras using the contrast-based AF, the focusing algorithm has to blindly try various lens positions and compare the results, because it has no other way to know what the correct focus distance could be. Some smartphones, having specialized focusing hardware, can also use faster ...


0

In this scenario I would use a light beam activated remote shutter control. This is a device consisting of a beamed light source (typically a laser or a LED and a photo sensor). As soon as the beam is broken by an incoming object, the shutter is triggered. Warning! Since you have to place the trigger in the path of the train it might be tempting to step ...


4

When the light gets dim enough there comes a time when you have to give up shooting sequences of fast moving objects coming towards you and instead pre-focus on a spot and wait for the subject to hit the mark. Cross ties work pretty good for locking focus on a point the train is about to be. You also gain the advantage of getting the one shot when the train ...


1

If the camera is having trouble focusing, you can use try using manual focus and waiting for the train to come to the correct depth and take the photo at that moment (or take a series of photos near the time). Additionally, if you have enough light, as Michael Clark noted, you can stop down the aperture (bigger number) in order to increase the depth of ...


1

In general, and this applies to every camera from the cheapest cameraphone to the most expensive SLR, "auto" means "do what the camera thinks is best for the given scenario". While certain cameras may fix some "auto" parameters under some circumstances (for example, I know that my Canon SLR fixes ISO at 400 if the flash is in use), the general case is that ...


1

If this issue is progressively getting worse as you have stated, there is a good chance the autofocus sensor is in need of cleaning. If changing to a different focus zone provides better focus lock then this would tend to confirm a spec or two on the sensor. A general haze can develop on the focus sensor from condensation and/or airborne pollutants. As a ...


3

I suspect that you have the camera set on auto focus single shot which by default will only fire if it can acquire focus. Since getting AF to work in the dark is not easy (but not always impossible) I think what happened is the camera could not get a AF lock and would not trigger. To take pictures like that switch to manual focus and set the lens to ...


2

For phase detection AF to work properly, the camera needs more than just a clear glass replacement for the removed filter, it needs a replacement of a different thickness. IR rays don't focus on the same point as visible light, which is why lenses have (used to have?) a red dot to tell you how to adjust focus from the visible light distance to the correct ...


1

Going on the assumption you are asking about using point focus vs area focus, there isn't a perfect answer and it depends entirely on what your skill with the focus system is, the capability of the focus system and what you are shooting. The strength of area auto focus is that it allows the camera to quickly find something to focus on without thinking ...


1

Combining and restating Toph's answer and Matt Grum's comment: learn when to best use the (many! different!) autofocus modes of your camera, and practice with them extensively. There are many combinations of AF modes and some of them will be absolutely horrible for certain situations, while others will be horrible for other situations. You've already ...


2

I have a few things I try when timing doesn't allow pre-selecting a focus point: Focus and recompose Using the center focus point I'll half-press the shutter and recompose to my desired composition. Use a smaller aperture You can use a depth of field calculator (such as this one) to ensure the subject you're photographing is in focus within the near and ...


1

If the lens does not have the letters AF-S printed on it, it cannot be autofocused from a D3x00 (or D5x00) body because the lens has no focus motor, and the camera body has no focus motor, and you need at least one to achieve autofocus. You must manually focus the lens using the focus ring (the one with the distance markings) on the lens itself. If the ...


-1

Try manual focus, if it works that means there is some problem with Auto-focus mechanism of lens. Also if that lens is zoom lens, keep your camera steady.



Top 50 recent answers are included