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AE compensation, how its works?
I was playing around with my favorite toy Pentax DSLR and one question came cross my mind.How AE adjustment works?.

Back in old film ages cameras (I am not sure if I correct) in bracketing mode camera made 3-5 shots with different shooter speeds or aperture. Now digital age and what digital cameras setting is changed when I put camera in bracket mode?.

Shooter speed? No, doesnt looks like. Maybe it variants amplifying signal ratio from pixel sensor ? .

If so, it is looks like ISO bracketing. But if I work at edge camera setting 100 or 3200-6400 maybe it wont works? It is rare situation, but I am just curious,Thank you for answers.Alex...

Comments (7)

What does the manual say?.

If all else fails, post on the Pentax SLR forum.Chris R..

Comment #1

I have never really thought about it so I want back and looked at the EXIF data on some shots that I took with AE bracketing on my Olympus E510. It appears that, at least in the Oly, the ISO is always fixed. However BOTH the shutter speed and F stop are changed. I usually use A mode so I don't know what happens if you use AE bracketing in S mode or M mode or Auto mode. I may play with it just to see. If I get time today I'll post the results for you..

JimOlympus E-510 and a bunch of stuff to hang on it...

Comment #2

1. I looked at EXIF data and it's looks like shooter speed changes 3000,1500 and 750.

In one sequence. Unfortunately I used manual lens (Helios 44-2 58mm/f2) in manual mode.So, almost all parameters values are blank..

2. I looked in manual and didn't find answer on my Q.What happend if camera works in Av, Tv and other modes? Just curious..

BTW. Lens is cheap, isn't so good for landscaping photo but IQ very good..

Thank you all for inputs..

Comment #3

Try the Pentax forum - you should get more help there. Make sure you include your camera model in the post.Chris R..

Comment #4

AKozik wrote:.

I was playing around with my favorite toy Pentax DSLR and onequestion came cross my mind.How AE adjustment works?Back in old film ages cameras (I am not sure if I correct) inbracketing mode camera made 3-5 shots with different shooter speedsor aperture. Now digital age and what digital cameras setting ischanged when I put camera in bracket mode?.

It should be changing the shutter speed when using A and the aperture when using S, just like in the old days..

Shooter speed? No, doesnt looks like. Maybe it variants amplifyingsignal ratio from pixel sensor ?If so, it is looks like ISO bracketing. But if I work at edge camerasetting 100 or 3200-6400 maybe it wont works? It is rare situation,.

That would be ISO bracketing..

My camera has exposure bracketing, ISO bracketing and white balance bracketing. I don't know what yours has but you need only look in your menus and check what type of bracketing you have it set for...

Comment #5

I guess I missed this post before replying:.

AKozik wrote:.

1. I looked at EXIF data and it's looks like shooter speed changes3000,1500 and 750in one sequence. Unfortunately I used manual lens (Helios 44-258mm/f2) in manual mode.So, almost all parameters values are blank..

2. I looked in manual and didn't find answer on my Q.What happend if camera works in Av, Tv and other modes? Just curious..

Like in the old days, with M, it changes the shutter speed. Obviously. You just proved that. If you want it to change the aperture with bracketing, then use S...

Comment #6

It is more serious then I thought.And as Chris R-UK told me I would post it on Pentax SLR forum.But for people who already involved in this post I can say following:1. I have K20D but for this moment I have only old Helios..

2. Camera has extended brackets for WB, Saturation, Hue, Contrast, Sharpness and "Regular" bracket.3. There are conventional Tv, Av, Program (Could be 4 variants) and "special"Sv (ISO), TAv (Tv+Av)..

Because camera has no idea what lens attached it always work in Av or Manual mode..

So for now, I do not know what happened if camera will pair with modern lens..

Logically, in "regular" bracket mode, it should be variation around current shooting mode, but I will check it when DA 12-24 arrived...

Comment #7

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