대전하늘도 상당히 밝을것 같은데 ... 잘나오는군요.

네, 대도시에서도 잘 찍힌다고 합니다. 제가 읽고 있는 책에 이렇게 나와 있습니다:
With a 200 mm telescope, we have reached magnitude 19 (without filters) from a site surrounded by street lights about fifty meters apart, when the naked eye limiting magnitude was only three. Even in the heart of modern cities there is still ample opportunity for significant astronomy. (CCD Astronomy p.281, Christian Buil)