High Falls, Pigeon River

by Jakub

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Teleconverters tend to be better when used on f/2.8 or faster lenses and on primes vs. zooms. Adding one to a 70-300 consumer-grade zoom (if you don't have the L version of the 70-300) is problematic at best, since most of these are f/5.6 lenses at the long end, and adding even just a 1.4x tc to it makes it an f/8 lens--at which point an entry-level dSLR ...


I also had to make this choice. For the TC you must be 100% sure that it goes with your lens. The advantage of a TC is that it is cheaper, smaller, and lighter. A 150-500 will be more expensive, bigger, and heavier but a better aperture. If possible I would recommend rental of a 150-500. This gives you the possibility to test it out for real. If you like ...


I'm not sure there's even a Canon TC that will work with that lens, which means a lower quality TC. And loss of at least one stop of light. All in all, perhaps not better quality than simply enlarging the critter when editing the photo. Not only that, but auto focus may suffer a bit, so that can degrade image quality as well. Unfortunately, TC's work best ...


A teleconverter will magnify the image produced by your lens on the sensor, but will not produce a better resolution than your original lens had. It just cannot: it comes after the lens on the optical path. In other words, if two points were too small/far away to be distinguishable with your lens, the teleconverter will not allow you to distinguish them. ...


A converter will decrease your lenses lowest aperture, or make it less useful when it gets darker or shady. Plus, you are limited to a 1.4x converter, as the 2.0 converter will likely cause issues with the autofocus on your lens, since most Canon cameras require f5.6 or better to focus. The 2x converter adds 2 stops. At 300mm, your lens is already at f5.6, ...

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