Canon G7x macro problem

[atabaksh]

I am new to uw photography and mostly was doing my work with gopro. After doing some research I bought Canon G7x to start uw photography more professionally. After the first dive, the photos form distance were great, but Macro photos were not sharp. I tried to do some macros out of the water in automatic mode and again the macros were disaster. The center was a bit sharp but the other part of the picture was blurry. First I thought the problem was with my camera but after doing some search I found some others complaining about this problem and they were telling that as the camera had a big sensor the aperture should not be wide opened and it had to be closed to help the camera focus better. I did and the pics were better but not completely sharp yet. So I have these questions
1. If the aperture of this camera should not be wide opened in the Macro why does canon have programmed the aperture of camera to be wide opened in the automatic mode? Don't they know this ruins the macro photo?
2. How can I get sharper macros like the ones you can get with cheaper cameras.
Any help appreciated.

 

[rob1967]

It's a bit difficult to answer your question because you haven't provided enough information. Are you shooting automatic or manual mode? What do you have for light source? What settings are you using (or if you are in automatic mode, what settings is the camera choosing?)If you are shooting automatic mode with no artificial light source, and assuming there is little ambient light, your pics will be of poor quality because your camera will meter for ambient light and select a wide open aperture, with slow shutter speed and high ISO, so you will have blurry pics.

 

[dhaas]

It's not the camera..........

Canon G7X even with bigger 1" sensor can take great close up / macro pics.

www.haasimages.com

 

[oly5050user]

Need to use highest number aperture that the camera has to increase depth of field to get sharpest image. Shoot in manual, ISO anywhere from 100 to 200, shutter speed can vary from 200 to fastest camera can support if you want image exposed properly and background dark or even black. Some may say different but I recommend using TTL that camera probably such supports via a hot shoe to ensure proper exposures. Only housing manufacturer I know of that allows you to use that feature you paid for when you purchased that camera is ikelite while using an ikelite strobe

 

[oly5050user]

Need to use highest number aperture that the camera has to increase depth of field to get sharpest image. Shoot in manual, ISO anywhere from 100 to 200, shutter speed can vary from 200 to fastest camera can support if you want image exposed properly and background dark or even black. Some may say different but I recommend using TTL that camera supports to ensure proper exposures. Only housing manufacturer that allows you to use that feature you paid for when you purchased that camera is ikelite while using an ikelite strobe

 

[timz]

I am new to uw photography and mostly was doing my work with gopro. After doing some research I bought Canon G7x to start uw photography more professionally. After the first dive, the photos form distance were great, but Macro photos were not sharp. I tried to do some macros out of the water in automatic mode and again the macros were disaster. The center was a bit sharp but the other part of the picture was blurry. First I thought the problem was with my camera but after doing some search I found some others complaining about this problem and they were telling that as the camera had a big sensor the aperture should not be wide opened and it had to be closed to help the camera focus better. I did and the pics were better but not completely sharp yet. So I have these questions
1. If the aperture of this camera should not be wide opened in the Macro why does canon have programmed the aperture of camera to be wide opened in the automatic mode? Don't they know this ruins the macro photo?
2. How can I get sharper macros like the ones you can get with cheaper cameras.
Any help appreciated.

To answer ur question, you have to read more about aperture effect on depth of field and lighting.

In automatic mode, the camera will try to get as much light as possible to achieve what is set to be good lighting based on light metering mode.

One of the way is to open the aperture as much as possible. Though this will allow more lights to fill in to the sensor, it will also cause the depth of field to be narrow. Meaning the subject in focus will be at a very slim distance from the focus point.

Another way is to open the shutter long ler to allow more light to fill in. However, if the shutter is too slow to be handheld, it can cause image blur caused by handshake.

These are the 2 method to control lights. In able to get a desire picture result, you need to combine both method to achieve the right depth of field so that everything u want them in focus are in focus at the same time shutter not too slow that ur hand couldn't handle.

Another method is to use a strobe.ever notice most of the macro shot has black ground?? I mean most and not all. That's because they close down the aperture so that more subject is within the focal range. Increase the shutter speed so that it can be shot sturdily and still the image perfectly. However, if this to shoot a macro subject, most lightly the subject or the picture will turn out dark and underexposed. So, they just use a strobe to fill in whatever lights required for the inage to look decent.