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Messages - Chimico Pazzo

#1
Thank you, (I think to have understood what I must to do)
I will tell something as soon as I try.
#2
Great! Really great!!
I have tried and everything work:series of shots in silent picture with live view display turned off.

I have tried the same thing in live view zoom 5x to test what happen but the frame remain full. (I knew but.. why not try! :P )

May ask I where I can find the patch for avoid the exposure limit?
#3
Quote from: Walter Schulz on April 11, 2019, 12:39:54 PM
Try Prefs tab -> Powersave in Liveview -> Enable while recording ON & Turn off LCD after 5 sec

I admit, I never considered this menu. I will try this way, thank you!

Quote from: Kharak on April 11, 2019, 12:44:43 PM
I have no experience with astrophotography.

But would MRaw or Sraw work for decreased sizes? not sure how the sharpness is though. Should be better than a HD frame by frame though.

In astrophotography you need the best raw you can. Are considered unusable Mraw and Sraw
Thank you for your partecipation!

Quote from: a1ex on April 11, 2019, 12:53:35 PM
The full-res silent picture mode can do long exposures (it's limited to 15 seconds in mainline, but there is a patch available for bypassing this limit), so... it's technically possible to implement, as long as you use our DNG format (not CR2).

Just not a priority for me right now.

It's also possible (and maybe easier) to crop the full-res CR2/DNG files in post. I'd try something along these lines:
- extract the Bayer raw data (dcraw -4 -E *.CR2) -> 16-bit PGM files containing unmodified 14-bit raw data
- crop the files with ImageMagick (mogrify -crop 1000x1000+500+500 *.pgm)
- use pgm2dng to convert the PGM files to DNG

Slightly related: the full-res silent picture code can also capture dark frames; it's not implemented either, but if you run it outside LiveView, that's exactly what you are going to get.

I am not sure to understand all... DNG are no problem, I will try silent picture. Is it possible use silent picture with intervalometer?


Mean time I will go to study "silent picture" and "powersave" menu!
#4
Thank you!

The best thing is a central crop like 50-30% (possibly both :D) of frame with bulb timer. :P

The problem about low fps in video crop mode is temerature: the display/screen of camera is always on during record and its heat create termal noise...
#5
I know the raw video (I have a 550D and 6D) and I use it for planetary image and work very well!!
But my hope is to have crop mode on long exposure photos: it's hard and long process, for example, 200 or more raw file of 20mb (and others for dark frame, flat frame...) and often we crop final image...
Would be better have a cropped frame during acquiring light frame!

(An example of video raw on moon with SC 8" telescope)




#6
Hi forum!

First thing: I am sorry for my english.. I hope to explain me good... Be patient!

Like I write in the object, if there was the possibility of taking raw photographs cropping central part of sensor, it would be interesting in astrophotography because it would allow smaller files to be processed.

Is it possible?

Thank you for this great job called Magic Lantern!

Chimico Pazzo