Crop Factor. Something to consider when buying a lens when you are shooting other than FF.

Started Jun 6, 2014 | Discussions thread
b0k3h Regular Member • Posts: 445
Re: What about medium format or larger?
2

forpetessake wrote:

JackM wrote:

forpetessake wrote:

Manufacturers lie all the time, it's called advertisement!

When they convert the focal length to the FF equivalent and conveniently forget to convert the f-stop as well they intentionally want to confuse the ignorant buyers blah blah blah

Except f2.8 at ISO 200 will meter the same shutter speed on FF, APS-C, m4/3, and on and on, so there is no need to convert f-stop.

And it looks you understood exactly nothing in this thread. What's your definition of the "need"? Is there a need to convert the focal length? Do you understand the equivalence? What it actually means and why do people do those calculations? I think not.

Furthermore, it is an immutable mathematical fact. Focal length divided by f-stop = aperture size, and that is that.

So what? You can divide or multiply anything upon anything, what's the meaning of it? What's the meaning of f-stop? Why is it important? You don't seem to know.

What's surprising in these forum discussions is not the ignorance per ce, it's the arrogance -- people are ignorant even about their ignorance, but they got somewhere the idea that they understand what they are talking about. No wonder they never learn anything.

-- hide signature --

The best argument against democracy is a five-minute conversation with the average voter -- Winston Churchill

maximum f-stop and fl are immutable properties of a lens, regardless of whether or not you choose to believe it.

just like the sun will always go up tomorrow, no matter how dark it is in your own little world.

Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow