Photography 2 1.1. Lesson task – Lenses and other optical accessories


CANON EOS 90D DSLR camera + 18-55 IS STM 

Part 1 

Have a good look at your lenses. 

  • What lenses do you have for your camera? I have a Canon 18/55mm
  • Are they fixed/prime or zoom lenses?Zoom lens.
  • What focal length do they have?18/55mm.
  • What is their maximum aperture?The maximum aperture of the Canon EOS 90D with the 18-55 IS STM lens ranges from f/3.5 to f/5.6.
  • In the case of zoom lenses, do they have a constant or variable maximum aperture?Variable.
  • What make are your lenses? 

Make a note of your findings. You can also include photographs of your lenses. 

Part 2 

  • Do your lenses have a distance scale?The closest focusing distance for the Canon EF-S 18-55mm f/4-5.6 IS STM lens is 0.25m.

Try to figure out for each lens what the closest focusing distance is, make a note of it, and post it with your findings from part 1. 

Part 3 

Photograph a scene, preferably a landscape or outdoor scene, in two ways: once using your shortest focal length and once with your longest focal length. Try to keep the composition the same as much as possible.

Keep your exposure for the two photos as identical as possible. If you use a zoom lens with a variable maximum aperture, you may need to compensate for this. 

Due to the magnification and angle of view changing, you may need to move backwards as you try to take the same shot with a longer lens. Take care when walking backwards; you may trip or even fall into a hole or the sea! 

You may need to change lenses for this, or if you have a zoom that covers this adequately, you may just need to zoom the lens.