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Re: Higher than 2 EV steps in Tv and Av bracketing?
« Reply #10 on: 15 / April / 2008, 11:47:18 »
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Re: Higher than 2 EV steps in Tv and Av bracketing?
« Reply #11 on: 15 / April / 2008, 13:11:42 »
« Last Edit: 15 / April / 2008, 13:21:23 by mrproper »

Re: Higher than 2 EV steps in Tv and Av bracketing?
« Reply #12 on: 15 / April / 2008, 15:46:05 »
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« Last Edit: 22 / April / 2008, 15:03:48 by Barney Fife »
[acseven/admin commented out: please refrain from more direct offensive language to any user. FW complaints to me] I felt it imperative to withdraw my TOTAL participation. Nobody has my permission, nor the right, to reinstate MY posts. Make-do with my quoted text in others' replies only. Bye

Re: Higher than 2 EV steps in Tv and Av bracketing?
« Reply #13 on: 16 / April / 2008, 13:18:19 »
Power up your camera, go to Av/Tv, zoom on this page on the screen, then play with the Ev setting. You will see the true range of YOUR ccd on the live histogtram :)
« Last Edit: 16 / April / 2008, 13:20:06 by mrproper »

Re: Higher than 2 EV steps in Tv and Av bracketing?
« Reply #14 on: 16 / April / 2008, 17:40:42 »
Deleted
« Last Edit: 22 / April / 2008, 15:04:10 by Barney Fife »
[acseven/admin commented out: please refrain from more direct offensive language to any user. FW complaints to me] I felt it imperative to withdraw my TOTAL participation. Nobody has my permission, nor the right, to reinstate MY posts. Make-do with my quoted text in others' replies only. Bye

Re: Higher than 2 EV steps in Tv and Av bracketing?
« Reply #15 on: 16 / April / 2008, 18:20:28 »
If there is insufficient picture information to fit in the JPG that fits in the RAW, why do you think you will want it?

Ok, let's see mine (A570), I go into Av mode, zoom in close range to a white space on this LCD screen, and I get a spike in the live histogram.

The live histogram is divided in 5 sections by 4 lines, so each is 20%. At EV0 I get a rather bulky sharp spike in the histogram at around 55-60% position. Then I go to EV-2, and the spike gets thinner (thus less information, more compressed) and it sits around 17-20%. Then I go to EV+2, the spike again goes a bit thinner (larger than the -2 one) and it stops at around 90%. So the full range of my CCD is 0%-100%, and the accessible range via the EV setting is 20%-90% (or 70% of the total). So if the accessible range is 6EV, then the full range must be 8.5EV?

And if the range is half the width at +/-2EV compared to 0EV, shouldn't I try to overlap it twice to obtain the same levels resolution as that of 0EV?  :xmas

Question: What practical reason would you have for +/-6EV on a general purpose photo, shot in good conditions?
« Last Edit: 16 / April / 2008, 18:25:28 by mrproper »

Re: Higher than 2 EV steps in Tv and Av bracketing?
« Reply #16 on: 16 / April / 2008, 18:48:33 »
Deleted
« Last Edit: 22 / April / 2008, 15:04:40 by Barney Fife »
[acseven/admin commented out: please refrain from more direct offensive language to any user. FW complaints to me] I felt it imperative to withdraw my TOTAL participation. Nobody has my permission, nor the right, to reinstate MY posts. Make-do with my quoted text in others' replies only. Bye

Re: Higher than 2 EV steps in Tv and Av bracketing?
« Reply #17 on: 17 / April / 2008, 11:12:03 »
(btw: I'm not the one wanting a +/- 6EV bracket shot, in case your question was directed at me)

It was directed to anyone willing to answer :)

It doesn't appear as if their A570 tests are as extensive as they did for the S3.

They claim 7EV at ISO80 and then it drops to 5EV at ISO100, etc.




This is against my observations. I guess I need to check their method and repeat the experiment for myself. Even so, how come ISO1600 gets only 2EV? Is this for the JPG images or what? They could be right, since I haven't locked exposure time and F factor and then manually changed EV to see the results.

Re: Higher than 2 EV steps in Tv and Av bracketing?
« Reply #18 on: 17 / April / 2008, 16:40:08 »
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« Last Edit: 22 / April / 2008, 15:04:57 by Barney Fife »
[acseven/admin commented out: please refrain from more direct offensive language to any user. FW complaints to me] I felt it imperative to withdraw my TOTAL participation. Nobody has my permission, nor the right, to reinstate MY posts. Make-do with my quoted text in others' replies only. Bye

Re: Higher than 2 EV steps in Tv and Av bracketing?
« Reply #19 on: 17 / April / 2008, 17:04:51 »

So then the EV is virtual and not real?

Remember, when you compare DSLR with CCD, you will notice CCD photosites are smaller and noisier, and make [admin: avoid swearing please] shots at low light and high ISO. Also, consumer cameras have [admin: avoid swearing please] optics.

 

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