f/2.8 vs f/4

cdi-ink.com wrote in post #2269638
That's only in the newest NFL stadiums.

Not always.

Both with 70-200 f/4

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Wow, very nice rabidcow. On that first football shot, what ISO did you use? and was the lens wide open? it looks great. Sharp, great color and contrast. How far away were you?

rabidcow wrote in post #2269690
Not always.

Both with 70-200 f/4

I was being a bit sarcastic (note the wink) but at any rate...


Not much going on in your first shot. High shutter speed not really necessary as with real action. Second shot, not exactly sharp. I see motion blur even at web size. I like the POV on the second though.

I was at ISO3200 and yes the lens was wide open (f/4) As for how far away I was, I don't know, I forgot my tape measure. but I was on the sidelines.

cdi-ink.com wrote in post #2269922
I was being a bit sarcastic (note the wink) but at any rate...


Not much going on in your first shot. High shutter speed not really necessary as with real action. Second shot, not exactly sharp. I see motion blur even at web size. I like the POV on the second though.

Yeah, I saw this too-- I shoot volleyball at f/2.8, ISO3200, 1/600-800 of a second. Any slower and blur becomes an issue. 2.8 really isn't even fast enough in this case, I'm seriously considering an 85/1.8.

tsaraleksi wrote in post #2270192
Yeah, I saw this too-- I shoot volleyball at f/2.8, ISO3200, 1/600-800 of a second. Any slower and blur becomes an issue. 2.8 really isn't even fast enough in this case, I'm seriously considering an 85/1.8.

You need to be at these shutter speeds because of the speed of the ball? not the players themselves? or for both? I would think that 1/600 would be able to stop the players with no blur.

TMR Design wrote in post #2270236
You need to be at these shutter speeds because of the speed of the ball? not the players themselves? or for both? I would think that 1/600 would be able to stop the players with no blur.

The ball moves fast, especially when spiked.

cdi-ink.com wrote in post #2270237
The ball moves fast, especially when spiked.

You get ball blur at even 1/800, but no player blur (well, their hands wind up soft, but that's not bad).

In my experience, the volleyball players that I shoot move shockingly fast, and really require probably as much if not more speed to shoot than say, nighttime soccer. Well, it's irrellevant now, volleyball season is over and it's basketball time now. And like I said, I vary it, just depending on how I'm feeling, or something like that.

rabidcow wrote in post #2269165
One at 2.8, the other at 4, not changing shutter speed. Note the softness at 2.8.

So one exposure is incorrect - that will affect the result, not a fair test then.

PaulB wrote in post #2270740
So one exposure is incorrect - that will affect the result, not a fair test then.

You obviously missed the point of the samples.

cdi-ink.com wrote in post #2270747
You obviously missed the point of the samples.

I stand by what I wrote. And no, I didn't miss the point, but that doesn't make it a fair test, the parameters have changed from one exposure to the other and therefore the results cannot be exactly compared.
Now if the ISO was changed to accomodate the different exposures - but that introduces another variable into the equation..........

PaulB wrote in post #2271014
I stand by what I wrote. And no, I didn't miss the point, but that doesn't make it a fair test, the parameters have changed from one exposure to the other and therefore the results cannot be exactly compared.
Now if the ISO was changed to accomodate the different exposures - but that introduces another variable into the equation..........

Ahh but you DID miss the point. The point, as stated, was to show the BRIGHTNESS differences between f/2.8 and f/4. When you're comparing apertures, everything else must be constant. Haven't you ever performed a science experiment before?

Rabidcow will now stand up, walk over to the wall, and begin beating his head against it.

rabidcow wrote in post #2271288
Rabidcow will now stand up, walk over the wall, and begin beating his head against it.

How big is that wall? Got room for one more?

rabidcow wrote in post #2271288
Rabidcow will now stand up, walk over the wall, and begin beating his head against it.

Helpfulness is its own reward.