« on: November 16, 2012, 02:19:55 AM »
Just tried another with iso 100. I am happy. No NR needed in LROne more happy user
That's nice and gives some good feeling to me
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Actually mirror lock is not required – just an option to get better image sharpness – reducing camera vibrations and preventing refocusing for each ME shot in sequence.So I activate mirror lock just before ME shot sequence (done automatically after camera focused on the subject) and then deactivate it after ME shot sequence (using SET button - selectable option in mirror lock function) or it is deactivated itself later by camera itself .Unfortunately this is not supported by my 5DMkIII that's why I was wondering how you can do that. So it's only Live View for me (OK I know it is sufficient and actually a super set of Mirror Lock for this purpose but still ...)
As I understand it, the pixel data will be averaged and not summed as that is what is selected in step 1.3. So my understanding is that the exposure should be sufficient to capture all the light for the subject. It is only in the dark areas that the random noise will be evened out.Averaging is summing up all the values and then dividing result by number of samples.
Neutral, do correct me if I did not get it right.
Will single long exposure achieve the same effect keeping iso constant?
9 exposure with total integration of 2.5secs = smaller aperture and keeping shutter open for 2.5secs?
This method is commonly use in Astrophotography to reduce noise (mainly to reduce random noise) and improve image quality...This correct. And they could use thousands and thousands of images for averaging to extract details that far below noise level. And have supercomputers to do this using sophisticated processing algorithms – not just simple averaging
For me to make it easy to use I just registered ME and Mirror lockup in the1Dx custom menu (last tab).
Neutral: could you please give a step by step instruction how this can be done?
Just a question. You mentioned that you kept the mirror locked until the end of the sequence. Do you mean that the mirror was up the whole time ?Assuming that 5D3 and 1Dx are exactly the same in ME this cannot happen unless you are using LiveView. Unless you meant you had activated mirror locking and you deactivated it afterwards. But in that case the mirror moves up before and then down after every shot.Actually I was activating mirror lock before ME sequence and then deactivating it afterwards - this was more convenient for me. To keep it up until sequence is completed it should be set to be released by set button instead of deactivating after each shot.
My pleasure again)))Glad if that was useful to any of 1Dx users.I guess you helped 5DMkIII users too as the Multiple exposure capabilities of the two cameras seem similar
So thank you on behalf of the 5DMkIII users too ...
Tried this trick out tonight and it works a treat!
I never noticed how much noise was in the shadows at 100 ISO before. This method really helps bring out the details.
Thanks for sharing, I can't wait to use this more.
Thanks, Neutral. Nice shot, and definitely improved by the post processing.And all that became possible (to have noise free shadows with all details) as result of SNR improvement using ME shot. Basically there was a very little bit of post processing for that in LR.
Nice pictures by the way.evening/night city shotsWho is gonna do low light shots with ISO 100? Seriously?
Mad dogs and Norsemen?
Oh, and me...
No DPP, just lossless TIFF export from LR.So as you suggested I did noise comparison for original RAW and TIFF (lossless converted from RAW, to16 bit TIFF, color space is the same Adobe RGB, no re-sampling - the same pixel count).Quick question. Did you create TIFF image via DPP as opposed by this method?