Mar 7, 2017 Session

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After reviewing the excellent Photoshoot submissions from last Friday, and a general discussion of photography ethics, we devoted the rest of the hour to close-up and macro photography. My apologies for forgetting to bring the colorful peppers.

I realize there are many different cameras, and some of the “all-in-one” cameras have a “Macro” or “Close-up” mode. These cameras typically don’t have interchangeable lenses and a compromise is made in the lens mechanism to be able to get very close to objects.

In general it is true that when you get close to objects with your camera, the “Depth of Field” gets shallower. To counteract this effect you typically try to reduce the camera aperture (high f stop number). The disadvantage of this is that you need longer exposure times. To take sharp pictures at longer exposure times you need to stabilize your camera, which is typically done with a tripod.

Assignment: Try getting as close as possible to the start of a tape measure and take several pictures in Aperture Preference mode. Vary the aperture from a low to a high number. Post the results.

Canon 60D on Aperture Preference with 100 mm Canon Macro Lens – f/2.8, 1/125 sec, ISO 400

Canon 60D on Aperture Preference with 100 mm Canon Macro Lens – f/11, 1/125 sec, ISO 6400

Canon 60D on Aperture Preference with 100 mm Canon Macro Lens – f/32, 1/15 sec, ISO 6400

This will give you a good sense of what your camera is capable of with close-up photography. Depth of field depends on aperture, and it is a balance between available light and exposure time/ISO.

A solution to this depth of field problem with clos-up photography was demonstrated with Photoshop Elements. The problem with getting close to a subject with your camera is, that even at a high f-stop such as f/22 the depth of field is often not enough to get a sharp picture everywhere on the image. Here is an example

A detailed tutorial on how to do this in Photoshop Elements will follow shortly.

Henri

 

Course itinerary for March 7, 2017.

  • Review of submissions for the last few photo challenges and the course submissions.
  • Recap of exposure and focusing techniques and how to use them in composing a scene.
  • A quick “show and tell” on the new Edit Tutorials
  • Overview of “close-up” and macro photography
  • Discussion of equipment and lenses.
  • Break
  • Practice opportunity for small object photography on the “Mini Stage”.

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