Focal length 35mm equivalent, but not F-stop?

Started Jul 24, 2014 | Discussions thread
Lee Jay Forum Pro • Posts: 55,159
Re: Focal length 35mm equivalent, but not F-stop?

Lee Jay wrote:

Lee Jay wrote:

I also use equivalence to make purchase decisions, and decisions about what equipment to carry into certain situations. Sometimes I use it for determining what settings I want to use in some situations.
--
Lee Jay

"I also use equivalence to make purchase decisions,..." I like to challenge this sentiment.

I say that you have not chosen m43 because m43 f/2 is equivalent to f/4 on FF. You know FF can do f/2 as well as f/4.

Also, I will say that you have not chosen FF because f/4 is equivalent to f/2 on m43.

And so without the actual comparison of the real images that you're after, this equivalence is meaningless to make the purchase decision.

Nope...wrong. I use equivalence to plot lens (and format) performance envelopes, just like DPReview has started doing in their compact camera reviews (except mine are better). In fact they started doing that because of my repeated suggestions over several years.
--
Lee Jay

Now I'm being passive aggressive - so you don't look at the images from potential equipment you want to buy? You buy FF because f/4 is equivalent to f/2 on m43?

That is one consideration of many.
--
Lee Jay

 Lee Jay's gear list:Lee Jay's gear list
Canon IXUS 310 HS Canon PowerShot SX50 HS Canon EOS 7D Mark II Canon EF 70-200mm F2.8L IS II USM Canon EF 8-15mm f/4L Fisheye USM +23 more
Post (hide subjects) Posted by
(unknown member)
tko
tko
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow