Canon's release of 600/800mm f11 lenses PROVES you don't need Cannons!

Started 2 months ago | Discussions thread
Adrian Harris
Adrian Harris Veteran Member • Posts: 6,031
Re: Moreover, they finally demonstrate where equivalence stops

Astrotripper wrote:

Wu Jiaqiu wrote:

MHshooter wrote:

There are optical downsides to fresnel lenses. I'd prefer if they (Olympus) stuck with making absolutely top-flight optics.

i've used both of the Nikon pf lenses and have never experienced optical downsides from them, i'm not saying they don't exist but just maybe they are a little overstated.

I would agree. The one particularly glaring feature of PF lenses is completely irrelevant to typical uses of such a lens.

Yet reading in the Canon forum has given me the impression that the fresnel lens is causing some on sensor PDAF focusing issues. Is this true?

-- hide signature --
 Adrian Harris's gear list:Adrian Harris's gear list
Sony RX100 Panasonic Lumix DMC-G1 Sony SLT-A77 Panasonic Lumix DMC-GX7 Panasonic Lumix DMC-GX8 +1 more
Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow