FallisPhoto
Veteran
Rangefinder strengths:
1. SLRs use retrofocus lenses; they have to, because the lens has to be placed farther away from the film plane (due to the mirror box) than is optimum. This works fine with telephotos lenses, but not as well with normal lenses and it is pretty awful with wide angle lenses. Rangefinders don't use retrofocus lenses because they have no mirrors, and so perfermance is superb with normal and wide angle lenses but not very good with telephoto lenses.
2. SLRs use lenses that have their best performance only in a very narrow range of f/stops (usually f/8 to f/16). Typically even a good SLR lens will not do very well stopped down to f/22 or opened up to f/2. Again, this is inherent in the retrofocus design. Since rangefinders don't use retrofocus lenses, they don't have this problem. f/2 and f/22 will both be sharp.
3. SLRs are more difficult to use in low light. There is a pretty wide range of focus adjustment where the image will appear sharp. A coincident rangefinder's superimposed images (or even a split image rangefinder) make it much easier to focus accurately in low light.
4. Because there is no mirror swinging up and down and bumping into things in a rangefinder, there are no mirror-induced vibrations that can cause camera shake and motion blur. This means you can shoot handheld at significantly slower shutter speeds than would be possible with an SLR.
5. Rangefinders are far quiter than SLRs and so are less intrusive.
Rangefinder weaknesses:
1. It is going to be nearly impossible to use a graduated ND filter or a polarizer with a rangefinder. You have to be able to see through the lens in order to use these effectively, and most rangefinders don't allow you to do that.
2. Rangefinders don't do very well with telephoto lenses. I don't think you can even get a lens that is over 135mm.
Conclusion:
Rangefinders excell at full-length people photos and group photos, at street photography and at low light photography. SLRs are going to be better at most other things.
As you can see, the rangefinder and SLR systems compliment one another almost perfectly. Each system's weak points precisely match the other's strong points. Ideally, you'll have both.
1. SLRs use retrofocus lenses; they have to, because the lens has to be placed farther away from the film plane (due to the mirror box) than is optimum. This works fine with telephotos lenses, but not as well with normal lenses and it is pretty awful with wide angle lenses. Rangefinders don't use retrofocus lenses because they have no mirrors, and so perfermance is superb with normal and wide angle lenses but not very good with telephoto lenses.
2. SLRs use lenses that have their best performance only in a very narrow range of f/stops (usually f/8 to f/16). Typically even a good SLR lens will not do very well stopped down to f/22 or opened up to f/2. Again, this is inherent in the retrofocus design. Since rangefinders don't use retrofocus lenses, they don't have this problem. f/2 and f/22 will both be sharp.
3. SLRs are more difficult to use in low light. There is a pretty wide range of focus adjustment where the image will appear sharp. A coincident rangefinder's superimposed images (or even a split image rangefinder) make it much easier to focus accurately in low light.
4. Because there is no mirror swinging up and down and bumping into things in a rangefinder, there are no mirror-induced vibrations that can cause camera shake and motion blur. This means you can shoot handheld at significantly slower shutter speeds than would be possible with an SLR.
5. Rangefinders are far quiter than SLRs and so are less intrusive.
Rangefinder weaknesses:
1. It is going to be nearly impossible to use a graduated ND filter or a polarizer with a rangefinder. You have to be able to see through the lens in order to use these effectively, and most rangefinders don't allow you to do that.
2. Rangefinders don't do very well with telephoto lenses. I don't think you can even get a lens that is over 135mm.
Conclusion:
Rangefinders excell at full-length people photos and group photos, at street photography and at low light photography. SLRs are going to be better at most other things.
As you can see, the rangefinder and SLR systems compliment one another almost perfectly. Each system's weak points precisely match the other's strong points. Ideally, you'll have both.
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