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Photography Questions

Digital Photography Questions

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Ask your question or find answers for some frequently asked digital photography questions here.

If you have question about digital photography or digital cameras we would love to hear from you. You can use the form below to submit your photography question or check out the ones that have already been answered.

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How do I set my Canon Powershot a4000 is to take good action/sport pictures

How do I set my Canon Powershot a4000 is to take good action/sport pictures?

How do I set my Canon Powershot A4000 is to take good action/sport pictures?


The Canon Powershot A4000 is what is known as a "point and shoot" camera. These cameras are designed to be simpler in operation than a DSLR and as such often have limited manual or semi-manual modes which can limit their ability to take good sports action shots.

The key to capturing good action photos is to have a fast enough shutter speed that you can freeze or stop the action. One major problem with taking photos at sporting events is they often have less than ideal lighting. This can present a problem when trying to use a point and shoot type of camera because it is harder to get a fast enough shutter speed.

Unfortunately the Canon A4000 does not have either an aperture priority or a shutter priority mode as those would be the two best modes to use when taking sports action shots. However since your camera does not have either mode the best thing you could probably do is use the Program AE Mode (found on page 83 of your camera manual). This mode will allow you to increase your ISO and therefore should help you get a faster shutter speed. Depending on which type of sport you are shooting and the lighting conditions you are under you would generally want at a shutter speed of at least 1/250 second and more preferably 1/500 of a second. Of course in some lighting conditions you simply might not be able to get that high of shutter speed due to the limitations of the camera and lens.



How do I get rid of the white shadow effect in some HDR shots of old buildings

How do I get rid of the white shadow effect in some HDR shots of old buildings?

How do I get rid of the white shadow effect in some HDR shots of old buildings?


The answer to your question depends on what type of software you are using to produce your HDR image. The white shadow effect is what is known as a “halo” and there are different ways to control the halo or correct it.

Some HDR software has adjustment sliders that let you vary the different effects on the tone-mapped image. For those programs correcting or reducing the halo effect can be as simple as fine tuning the right adjustment sliders.

Other HDR programs seem to give you less control or are more prone to producing the halo effect and for those you will need to use one of several techniques using blending modes in Photoshop or similar editing programs that will allow you to reduce or eliminate the halos.

When fine tuning the adjustment sliders does not work or you lose some of the desired HDR effect you will need to do additional editing of the image in Photoshop or some similar editing program. There are a couple of different ways of reducing the halos on an HDR photo using Photoshop. Depending on your photo it might be as simple as using the clone tool to “clean up” the halo areas or possibly replacing the sky by using layer masks, etc.

In my opinion probably the best technique to use in Photoshop for eliminating halos is to use the blend tool to effectively blend the sky from one of your original images with the sky of the HDR image. You can find this technique discussed here: Removing halos from blue skies

This same basic technique of blending two HDR images to reduce or eliminate the halo effect all within the popular HDR program Photomatix can be found here:Reducing the halo effect in Photomatix

I hope this helps answer your question.

Good luck on your HDR photography. I would love for you to share some of your HDR photos as well as the techniques used to produce them with my readers if you would like to.

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