Minimum focal length to render smaller galaxy detail?
After imaging the supernova in NGC 7331 the other night it became painfully obvious my optic's focal length is pushing the limits of what detail can be seen. In looking at various sources there's just 30 or so galaxies visible in the northern hemisphere that are larger.
So the question is what's the minimum focal length I should consider to image the thousands of galaxies say between 1 to 4 arcminutes in size which could render some detail?