The first activity for focal lengths is capturing a portrait image in three different focal lengths, wide-angle, normal and telephoto. For this activity, I decided to use three different lenses.
Firstly, I used a Canon zoom lens 18-55mm 1:3.5-5.6 at a focal length of 18mm in aperture priority mode with an f-stop of f/3.5, at ISO-100 and an exposure time of 1/100sec.
![IMG_4996[1]](https://dip.home.blog/wp-content/uploads/2019/03/img_49961-2.jpg?w=1180)
Wide-Angle: The zoom lens at 18mm on autofocus, I struggled to get the autofocus to get its field of view where I wanted it. I so badly wanted to go into manual mode, however, I thought I’d stay with autofocus just to see how it would turn out and compare to the other focal lengths. In camera, it looked like my subject was in focus, but now looking at the image it seems the field of view was still a little behind my subject. I really do not like shooting portraits with this focal length, for me, it’s a little frustrating and unpredictable. This was shot a couple metres away from my subject.
Secondly, I decided to use a Canon prime lens 50mm 1:1.8. I kept the camera in aperture priority mode with the same f/stop of f/3.5, at the same ISO-100 and the camera decided for an exposure time of 1/60sec.
![IMG_4999[1]](https://dip.home.blog/wp-content/uploads/2019/03/img_49991-2.jpg?w=1180)
Normal: The Canon 50mm prime lens, although it’s still within the realm of normal focal length, to me, it has a little bit of a telephoto feel to it. It creates great bokeh when focused in on a subject but also has quite a normal looking field of view for landscape type images or if your subjects are a little further back in the frame. I had to move back for this one to maintain a similar composition and would say it was roughly 8 metres away from my subject.
For the third, I decided to use the canon zoom lens 75-300mm 1:4-5.6 as this is the only telephoto lens I currently own. Now in saying that, I did leave my camera in aperture priority mode, however, I didn’t realise until after I took the shots that the aperture for this lens had a minimum f-stop of f/4 and at the focal length of 170mm it would be an f-stop of f/5. Still at ISO-100 and the camera chose 1/30sec for the exposure time.
![IMG_4998[1]](https://dip.home.blog/wp-content/uploads/2019/03/img_49981-2.jpg?w=1180)
Telephoto: The Canon zoom lens 75-300mm at a focal length of 170mm really pulls everything in tight, like a pair of yoga pants, and puts more emphasis on the focused area. Although the f-stop was not maintained and closed from f/3.5 to f/5, it shows the amount of bokeh you still get a couple stops away, I’d imagine a faster or a wider aperture zoom lens would produce more bokeh/ blurred background and would lower the exposure time.
Ok, so now we move on to the second part of this activity, an image from three different focal lengths, however, this time it’s just the scenery/cityscape and we maintain the camera position, only changing focal length. Again I stayed in aperture priority with an f-stop of f/3.5 and at ISO-100. The first image is at a focal length of 18mm using the Canon zoom 18-55mm and the camera decided 1/200sec exposure time was right for this setting.
![IMG_5006[1]](https://dip.home.blog/wp-content/uploads/2019/03/img_50061-2.jpg?w=1180)
Wide-angle: The Canon zoom lens 18-55mm at 18mm has a wide field of view, it captures a lot more of the foreground and peripheral view giving a decent representation of this locations length from my position.
This second image is from the same 18-55mm zoom lens, however, now we have zoomed in to a focal length of 48mm and the aperture had to change to f/5.6 and exposure rose to 1/50sec
![IMG_5007[1]](https://dip.home.blog/wp-content/uploads/2019/03/img_50071-2.jpg?w=1180)
Normal: The Canon 18-55mm zoomed in to 48mm. I decided to be lazy and leave the zoom lens on and just zoom to a focal length of 50mm rather than swapping out for my prime 50mm. It is roughly the same field of view, just a little lower quality than the “nifty fifty” and the aperture could have stayed at f/3.5 with the prime lens, reducing exposure time. As you can see, we have lost the foreground and peripheral view and have started narrowing our field of view.
The third image is from the Canon zoom lens 75-300mm at a focal length of 190mm, f-stop of f/5 and exposure time of 1/25.
![IMG_5009[1]](https://dip.home.blog/wp-content/uploads/2019/03/img_50091-2.jpg?w=1180)
Telephoto: The Canon zoom lens 75-300mm at 190mm has a very narrow field of view and we have now zoomed right up to the pole and lost all foreground and peripheral view, however, if you wanted an image of that pole and couldn’t get any closer, this lens is definitely your go-to lens.
So that’s it for now, but before I go I just want to mention that up until now I never shot in raw and had no idea what or why anyone would shoot in it, all that extra editing, software, storage space etc. But after using it a little and having a look at its capabilities, I can see how it can be an advantage and produce a better picture. I haven’t spent much time shooting raw or playing with the editing side of it yet but look forward to learning more about it and having fun experimenting with it.
Happy Snapping 🙂