Don

Joined: 12th November 2005

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Don
RR wrote:
I'm not sure if it's do-able or if it's currently down to computational power in bodies or whatever but instead of taking 3 seperate shots with the shutter closing each time couldn't 3 seperate exposures be computed from one shutter actuation. Follow me if you can & I'll keep the figures simple so you have the best chance of following me.


ie: you want a hdr image of 3 exposures you take one at -1 ev one normal & one +1 ev

lets say your -1 is a one second exposure, mid is 2 secs, & +1 is 4 secs. Is it not possible that instead of taking 3 exposures of 1,2 & 4 secs that you could take one 4 sec image & the camera could record 3 seperate exposures by "saving the data" at the 1 sec & 2 sec point without using the mechanical shutter. After all it is just recording a load of ones & zeros & should be able to work this out. Digital compacts have no mechanical shutter after all.

Now 4 secs is not going to help with movement but when you scale this to high shutter speeds you could freeze motion in HDR also. Surely it's just a matter of the right algorythm & enough computing power & speed to carry this off ?

Just an idea, do you think I need to patent it & get on Dragons Den ?
I had a similar thought some time back... my idea involved using an lcd panel to mask off the highlights in an image for a portion of the exposure (biased for the dark areas) to capture detial in both highlight and shadow....
but alas it seems most people are simply happy to use flash to control contrast in many situations, and hdr in other situations...

but what your talking about is somewhat like taking a video segment then merging the frames into and hdr still... I suspect that is coming....

Comment by Don posted on K7 HDR hypothetical question at 05/07/2009 - 02:12

Don
the longer the exposure, the more shots I'd take, and yes very noticable improvement.

Comment by Don posted on using Multi-exposure mode at 04/07/2009 - 18:21

Don
simonkit wrote:
Don wrote:
the resulting multiexposed image will have less noise than its long exposure counterpart. also a means to get motion blur effects when you don't have an nd filter handy....
Interesting stuff...how do you go about achieving this ?

thanks

Simon
tripod it, then just meter in manual mode, first, then do the multi exposure stuff

Comment by Don posted on using Multi-exposure mode at 04/07/2009 - 17:03

Don
Mannesty wrote:
Why bother, you'll get better results doing the same thing in post-processing.

You don't have to use it, just because it's there. This is one of the dumbest features I've seen in any DSLR.
actually for some subjects,ie waterfall, cityscapes, scenics, the multi exposure mode allows you to divide up a long exposure into shorter exposures and blend them into a final image. so why is that good? the resulting multiexposed image will have less noise than its long exposure counterpart. also a means to get motion blur effects when you don't have an nd filter handy....

Comment by Don posted on using Multi-exposure mode at 04/07/2009 - 16:48

Don
link
somebody is getting noticed..

Comment by Don posted on K-7 price dropping already? at 04/07/2009 - 15:44

Don
you wanna know the sick part?
took less time to read it than to print it...
I read it once and it''l take hold for life...

Comment by Don posted on Digital SLR and P-TTL flash guide at 04/07/2009 - 02:22

Don
got it, read it, very good thank you!

Comment by Don posted on Digital SLR and P-TTL flash guide at 03/07/2009 - 17:27

Don
My very first Paypal purchase!!!

Comment by Don posted on Digital SLR and P-TTL flash guide at 03/07/2009 - 15:05

Don
Matt, check your messages, I'd like to buy your book also.

Comment by Don posted on Digital SLR and P-TTL flash guide at 03/07/2009 - 14:49

Don
some places and times in Canada Products like Muskol 98% deet is the only thing that works...
but when bugs aren't so bad, you gotta worry about excessive bloodloss...
I try to down enough booze to get my blood alcohol levels high enough to seriously impare their ability to fly, and hope the little f#$$kers crash.

Comment by Don posted on Avon ! at 03/07/2009 - 02:39

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