>>2606409 (cont'd)Bird photography is unfortunately favoring huge, expensive, heavy, complex lenses 'cause most birds tend to be at a distance from you.
You need dat lens and a stable tripod more than some amazing sensor.
>>2606421>The crop factor helps increasing reachThat makes it sound better than it actually is. Or in other words, you're wrong:
https://photo.stackexchange.com/questions/23245/crop-sensor-enhances-zoom 