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2007-11-01 05:05:36 · 4 answers · asked by Piano Man 4 in Arts & Humanities Visual Arts Photography

Thanks for that, Edwin. I have a 90mm f2.8 and I've been looking for a 35mm f1.4 but found a 35mm f2 which I promptly purchased since the price was right. The f2.8 has been great but I was wondering if f2 was worth the jump. With a whole extra 1 stop, I'm more than happy.

2007-11-01 05:16:41 · update #1

Sorry Dr... I was just making sure

2007-11-01 05:28:15 · update #2

4 answers

One (1) stop. f2 admits twice as much light as f2.8; f2.8 admits 1/2 as much light as f2.

Example for illustration only:

f2 @ 1/500 sec.
f2.8 @ 1/250 sec.
f4 @ 1/125 sec.
f5.6 @ 1/60 sec.
f8 @ 1/30 sec.
f11 @ 1/15 sec.
f16 @ 1/8 sec.

2007-11-01 05:11:52 · answer #1 · answered by EDWIN 7 · 5 0

another digi shooter!!!

stops are 1 and 1.4 then they just double so next is 2 and 2.8 then 4 and 5.6

seee the pattern, all other numbers are half or less stops

so the answer is 0ne stop from 2-2.8........just like 1-1.4 is one stop

good question

a

2007-11-01 08:01:08 · answer #2 · answered by Antoni 7 · 2 0

Oops. I thought this was a "trick" (meaning "goofy") question in the spirit of a few we have read lately. Of course, it's one full stop. I have no trouble with full stops, but get tripped up at the 1/3 stop intervals...

2007-11-01 05:24:02 · answer #3 · answered by Picture Taker 7 · 2 3

Edwin is correct. It is one stop.

The standard stop scale, each with one stop difference is:
f/1.0
f/1.4
f/2.0
f/2.8
f/4.0
f/5.6
f/8.0
f/11
f/16

2007-11-01 06:42:20 · answer #4 · answered by CodemanCmC 4 · 2 0

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