Weird issue w/Ext. tube + M42 lens

Started Apr 20, 2012 | Discussions thread
ForumParentFirstPreviousNextNext unread
Flat view
Martin Ocando
Senior MemberPosts: 2,561Gear list
Like?
Weird issue w/Ext. tube + M42 lens
Apr 20, 2012

If I shoot my G3 using the extension tube and my 55mm Takumar, stopped down to f:11, this is what I get. Look the bright spot in the center of the image:

But if I shoot wide open, the center is not bright, but I don't have enough DOF.

What could be causing this, and how to avoid it.
--
Martin Ocando
-------------------------

 Martin Ocando's gear list:Martin Ocando's gear list
Panasonic Lumix DMC-G5 Panasonic Lumix G 20mm F1.7 ASPH Panasonic Lumix G 14mm F2.5 ASPH Panasonic Lumix G Vario 14-42mm F3.5-5.6 ASPH OIS Panasonic Lumix G Vario 45-150mm F4-5.6 ASPH Mega OIS +6 more
ForumParentFirstPreviousNextNext unread
Flat view
Post (hide subjects)Posted by
ForumParentFirstPreviousNextNext unread
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow