tag:blogger.com,1999:blog-10431517.post2938773192036519449..comments2023-10-06T22:49:22.824+08:00Comments on Oldfield's Observation Log and Astronomy Topics: Canon 400mm f5.6LOldfieldhttp://www.blogger.com/profile/03795500239305577247noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-10431517.post-30117032041171368062008-11-30T09:40:00.000+08:002008-11-30T09:40:00.000+08:00very true.very true.Oldfieldhttps://www.blogger.com/profile/03795500239305577247noreply@blogger.comtag:blogger.com,1999:blog-10431517.post-21226385392869118522008-11-28T00:57:00.000+08:002008-11-28T00:57:00.000+08:00beside internal flare, most of these zoom L lenses...beside internal flare, most of these zoom L lenses suffer from the end edge curvature, thus giving bloated stars over the edges. <BR/><BR/>I compared this lens with an 80ED semi-apo telescope, and the telescope was way better.<BR/><BR/>Well at the same time, you are getting a nice zoom lens with an autofocus... I'd say performance in AP is 4/10, daytime 8/10.<BR/>The other telescope is 9/10 in AP, and 4/10 in daytime.Tuguldurhttps://www.blogger.com/profile/02359339897526857999noreply@blogger.com