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02-01-2011, 07:46 AM   #1
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Anyone with a k7 please help (exposure bracketing)

Hello,

I was hoping someone could help thanks in advance. I am purchasing a K7 for HDR photography. I need some answers on the bracketing options for AEB. My question is what are the max values in terms of steps\stops when using AEB. the manual and most websites say the camera only offers 1/2, 1/3 steps which makes no sense since this has so much hype for HDR. Many other HDR resources and a couple threads on this forum indicate the K7 can achieve up to 2 stops well which is it?

here is a thread that indiactes 1-2 stops are possible but doesnt confirm. https://www.pentaxforums.com/forums/pentax-dslr-discussion/115483-exposure-va...o-bracket.html

I really need 1-2 full steps between exposures like most HDR photographers want can some one confirm the k7 has the option to go above 1/2 step up to 2 in the exposre mode. and why would pentax only list 1/3, 1/2 in manual if it goes beyond that I have wasted a ton of time on this.

02-01-2011, 08:33 AM   #2
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I just checked on my K-7. You can choose 0.3, 0.7, 1.0, 1.3, 1.7, or 2.0 EV steps between exposures.
02-01-2011, 09:36 AM   #3
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I don't own a K7 but my ancient K100DS does up to +/- 2 No reason to believe K7 is less than that.

EDIT: Never mind. Kammerer already confirmed it
02-01-2011, 09:42 AM   #4
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I have a K7 and yes, you can choose 2 EV steps along with 3 or 5 exposures to take at a time. Once you select the bracketing function you can change the values using either command dials.

02-01-2011, 10:07 AM   #5
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Guys thanks a million I cant wait to get this camera!
02-01-2011, 10:15 AM   #6
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QuoteOriginally posted by ismaelg Quote
I don't own a K7 but my ancient K100DS does up to +/- 2 No reason to believe K7 is less than that.

EDIT: Never mind. Kammerer already confirmed it
no worries thanks for taking the time to respond
02-02-2011, 06:43 AM   #7
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You can download the manual from this URL:

http://www.pentaximaging.com/images/temp/63391109412222249881268K7_MANUAL_FINAL_101409.pdf
02-03-2011, 04:38 AM   #8
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QuoteOriginally posted by cats_five Quote

Thanks yeah they really need to change page 116 the information is misleading and almost cost them a sale. I guess i could be reading it wrong.

they say this:

Set the exposure steps in {1.EV Steps} in the {C Custom Setting 1} menu (p.85) to increments of 1/3 OR 1/2 EV.

I dont get why they limit the information to those step values when they go way beyond that. Even the screen captures of the menu option only show 1/3 and 1/2 step options. Not allot of local shops carry Pentax so i coulndnt see for myself...


Last edited by pixelhunter; 02-03-2011 at 04:43 AM.
02-03-2011, 04:49 AM   #9
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They don't need to change anything (with regards to this anyway). You've got to read the full manual. All pg. 116 does is tell you what you are setting your EV steps to, be it 1/2 or 1/3, and even that shows plus/minus 5. It has nothing at all to do with Exposure Bracketing. That's covered on pg. 148.

Last edited by Jodokast96; 02-03-2011 at 04:57 AM.
02-03-2011, 10:04 AM   #10
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QuoteOriginally posted by Jodokast96 Quote
They don't need to change anything (with regards to this anyway). You've got to read the full manual. All pg. 116 does is tell you what you are setting your EV steps to, be it 1/2 or 1/3, and even that shows plus/minus 5. It has nothing at all to do with Exposure Bracketing. That's covered on pg. 148.
Ok thanks for pointing that out my lack of experience is definitely showing here... I guess I am confusing EV steps "Step Interval" and bracket value thinking they were one thing. I think this means that when using AEB in Exposure Bracketing Mode it uses its own set of values listed in manual to achieve 1-2EV stops for 3-5 exposures? I might be confusing EV range with EV steps. I purchased the camera its on the way I am sure I will get this down when it gets here.
02-03-2011, 12:02 PM   #11
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1/2 or 1/3 ev steps mean you can set the shutter in those intervals

For instance, 1 ev steps would be:
1/120, 1/60, 1/30, 1/15...

1/2 ev steps would be:
1/120, 1/90, 1/60, 1/45, 1/30, 1/20, 1/15...

1/3 ev steps would be:
1/120, 1/100, 1/80, 1/60, 1/50, 1/40, 1/30, 1/25, 1/20, 1/15...

So lets say your ideal regular exposure is 1/60

You can bracket 3 or 5 shots, lets say you choose only 3

Now you can choose, 1/3 ev steps, 1/2 ev steps, 1 ev or 2 ev steps between shots

So, if your middle shot was 1/60, then the next shot might be a darker 1/120 then a brighter 1/30 if you choose 1 ev steps

Or 1/60, 1/80, 1/50 if you choose 1/3 steps

Or 1/60, 1/240, 1/15 if you choose 2 steps
02-04-2011, 11:06 AM   #12
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QuoteOriginally posted by enoeske Quote
1/2 or 1/3 ev steps mean you can set the shutter in those intervals

For instance, 1 ev steps would be:
1/120, 1/60, 1/30, 1/15...

1/2 ev steps would be:
1/120, 1/90, 1/60, 1/45, 1/30, 1/20, 1/15...

1/3 ev steps would be:
1/120, 1/100, 1/80, 1/60, 1/50, 1/40, 1/30, 1/25, 1/20, 1/15...

So lets say your ideal regular exposure is 1/60

You can bracket 3 or 5 shots, lets say you choose only 3

Now you can choose, 1/3 ev steps, 1/2 ev steps, 1 ev or 2 ev steps between shots

So, if your middle shot was 1/60, then the next shot might be a darker 1/120 then a brighter 1/30 if you choose 1 ev steps

Or 1/60, 1/80, 1/50 if you choose 1/3 steps

Or 1/60, 1/240, 1/15 if you choose 2 steps

Thanks allot! I think I am getting this now.
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