Quote:
Originally Posted by dmp  taken last night from my back yard. I might invest in a teleconverter of some sort - as long as it wouldn't reduce Image quality.
300mm (480 effective length), f/7.1 1/60th  |
Any teleconverter is going to reduce image quality. If you're looking to fill the frame with the moon (uncropped), you'll need a focal length of greater than 1000mm on your 20D. IOW, you can't get there with a 300mm lens + TC. Even if you stacked a 1.4X and 2.0X TC, you'd still be short.