Comparing Olympus 4/3lenses to FX "Full Frame" offerings

Started 6 months ago | Discussions thread
mapgraphs
Regular MemberPosts: 391Gear list
Like?
Maximum Aperture
In reply to Ian Stuart Forsyth, 6 months ago

Ian Stuart Forsyth wrote:

Doctor Lecter wrote:

I beg to differ. *You* can remain ignorant on the subject if you wish... DOF changes, but fstops/apertures are the same regardless of sensor size. It's simple physics — the amount of light passing through the lens.

Exactly physics, the 50mm F2.8 has a larger front element than the smaller 25mm F2.8 front element now are you going to try and convince me that the same amount of light will pass thru the smaller 25mm F2.8 as a 50mm F2.8. Has the 25mm F2.8 have some special power that allows it to suck more light thru its smaller opening.

Um,

Yes, to get a f/2.8 maximum aperture on a 50mm focal length lens, the front element is going to be larger than that of a 25mm focal length lens with a maximum aperture of f/2.8. The size of the element is about the maximum aperture per THE FOCAL LENGTH.

It's not about how many more photons go through crystal as compared to graphite or coal.

Reply   Reply with quote   Complain
Post (hide subjects)Posted by
(unknown member)
(unknown member)
Oh?New
(unknown member)
(unknown member)
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow