AF tunning what actually happens?????

Started Jan 24, 2014 | Discussions thread
OP mironv Veteran Member • Posts: 9,778
Re: To understand better - or maybe worse

AZ Steve wrote:

The aperture blades, to be sure, are wide open when PDAF occurs. Marianne contends that the effective light cone used by the AF sensors is stopped down to an effective f/5.6. It is a very, very different thing!

I have Sigma AF500mm f7.2 and is still AF even with 1.4TC on it even on D70 in a basement with only one 60W light bulb very slow but it dose.

-- hide signature --
 mironv's gear list:mironv's gear list
Fujifilm FinePix S5 Pro Nikon D700 Nikon AF-S Nikkor 70-200mm f/2.8G ED VR Nikon AF Nikkor 105mm f/2D DC +10 more
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow