Originally posted by jatrax But as noted above if you are a true Pentaxian, you eschew such pedestrian things as zooms
Originally posted by kh1234567890 So that you can zoom with your feet ...
It would seem that the primes are the more pedestrian choice.
This is the part where I insert my standard
"zoom with your feet is a nice idea but..." rant. You can use your feet to get closer to or further away from the subject (assuming there is not a cliff or highway or something else in the way), but that is not the same as using a zoom. Consider the following:
- You are walking down a path and see a real cool composition of three loaves of bread at about 20' (6 meters) distance
- You stop in your tracks and put your K-3 to eye only to be reminded that the DA 15/4 Limited is mounted. The cool composition is visible in the viewfinder, but it is tiny...oh, so tiny.
- You set down your camera bag and creep up close, crouching low to keep the angle the same only to discover when you are at about 18" (0.5 meter) distance that the cool composition doesn't look the same from so close.
- You return to your camera bag and look back to confirm that the cool composition is still there (the loaves apparently don't have feet)
- You reach into your bag to extract the FA 77/1.8 Limited, change lenses, and take the photo. Mission accomplished! Time for lunch!
- I come up the same path a few minutes later and see the same cool composition (the loaves, lacking feet, have still not walked away), put my K-3 with DA 18-135/3.5-5.6 mounted to eye, frame the shot (zoomed to 80mm) and take the photo. Mission accomplished! Time for lunch!
The lesson intended is that perspective (the cool composition) is determined by camera position* and that a good quality zoom lens allows you to get the shot without having to do a lens change or resorting to a significant crop (your other option). In my opinion (humble or not, I don't know), the advantages to shooting with a set of excellent primes are:
- Excellent quality (relatively) fast zooms are usually heavy and bulky
- Excellent quality fast primes are often relatively small and not quite so bulky
- Good to excellent quality primes are often not very expensive
- Fast glass is somewhat more accessible
The advantages of an excellent quality zoom is:
- Less lens changes
- Much easier subject framing
- Looks cool
- Potentially less stuff in bag
Hmmm...short list, both ways. My personal preference is to shoot primes at short and moderate focal lengths and zooms at the longer end of things. For walk-around on APS-C, I mount either the FA 35/2 (Zenitar fisheye in pocket) or Sigma 17-70/2.8-4 (C).
Steve
* More correctly, the perspective is determined by the position (distance and angle) of the front element of the lens relative to the subject in conjunction with the angle of the focal plane relative to the lens. This distinction is only important for close work using lenses with long extension or when using a system capable of movements (view camera or tilt-shift lens).