Pana 20mm - Difference btw 1.7 and 1.8?

Started Oct 2, 2012 | Discussions thread
Bryan Biggers Veteran Member • Posts: 3,518
Re: Pana 20mm - Difference btw 1.7 and 1.8?

The 20mm is pretty much sharp across the board until you get to the smaller apertures where maybe diffraction kicks in. It is just a teeny tiny bit sharper at f/2.8 than wide open. It actually has less chromatic aberration wide open. So there is not much advantage if at all in stopping it down. See

 Bryan Biggers's gear list:Bryan Biggers's gear list
Olympus Tough TG-1 iHS Panasonic Lumix DMC-LX7 Olympus PEN E-P3 Olympus OM-D E-M5 Olympus PEN E-PM2
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow