Site Sponsors
Page 4 of 4 FirstFirst ... 2 3 4
Results 151 to 166 of 166

Thread: EM1 4.0 Firmware Upgrade

  1. #151
    Member zensu's Avatar
    Join Date
    Feb 2014
    Location
    Montgomery, AL, USA
    Posts
    21
    Post Thanks / Like

    Re: EM1 4.0 Firmware Upgrade

    Quote Originally Posted by Godfrey View Post
    Why? I don't see that anything changed on my SD card. All the existing exposures that were there still are...

    G
    Doh! I also forgot to remove SD card but it updated camera and lenses just fine and I still have all my images on the SD card? Maybe this isn't required anymore?
    Bobby
    Bobby
    "Reality leaves a lot to the imagination." John Lennon

  2. #152
    Super Duper
    Senior Member
    Godfrey's Avatar
    Join Date
    Jan 2009
    Location
    Near San Jose, California
    Posts
    7,927
    Post Thanks / Like

    Re: EM1 4.0 Firmware Upgrade

    Quote Originally Posted by Annna T View Post
    I guess it is because some computers will automatically launch a dialogue box or even a program once they acknowledge that a media with pictures or files is connected. It could immediately launch LR for instance. Sony, to master the same issue just says : close the window if something pops up when you connect the camera. This is a Windows thing due to the fact that the USB connection has to be set to storage mode. Not sure about Mac behavior.
    Good thought.
    Photos launched on El Capitan, so I bet this is why they said to do that. I just killed Photos before proceeding with the update.

    No harm done, it's all working fine. :-)

    G

  3. #153
    Senior Member Elderly's Avatar
    Join Date
    Oct 2013
    Location
    UK
    Posts
    262
    Post Thanks / Like

    Re: EM1 4.0 Firmware Upgrade

    Quote Originally Posted by scott kirkpatrick View Post
    Well, how do you do focus stacking? You take a series of images with the camera focused at different distances. They could do it with the autofocus mechanism, which in the E-M1 can use the phase-sensitive detection. This mechanism has the advantage of knowing whether the focus has moved closer or further, while contrast detection uses an error signal that increases both ahead and behind of focus.

    scott
    Hmmmmm - How does the camera know along which 'plane of focus' it should create its series of eight images? It must have a pretty sophisticated algorithm to be reliable.
    Ian.

  4. #154
    Member
    Join Date
    Sep 2008
    Location
    Vancouver, Canada
    Posts
    120
    Post Thanks / Like

    Re: EM1 4.0 Firmware Upgrade

    To answer your question, here is a cut and paste from the firmware updated user manual:

    regards,
    Dave


    Bracketing ([Focus BKT] added)
    [Focus BKT] (focus bracketing) is added to bracketing (P.90).
    Focus BKT
    Take a series of shots at different focus positions. Focus
    moves successively farther from the initial focus position.
    Choose the number of shots using [Set number of shots],
    the change in focus distance using [Set focus differential],
    and the charging time for the external flash using [#Charge
    Time]. Choose smaller values for [Set focus differential] to
    narrow the change in focus distance, larger values to widen
    it.
    Press the shutter button all the way down and release
    it immediately. Shooting will continue until the selected
    number of shots is taken or until the shutter button is
    pressed all the way down again.
    For flash shooting, set the shutter speed to 1/20 sec. or
    slower.
    Focus bracketing is not available with lenses that have
    mounts conforming to the Four-Thirds standard.
    Focus bracketing ends if zoom or focus is adjusted during
    shooting.
    Shooting ends when focus reaches infinity.
    Thanks 1 Member(s) thanked for this post

  5. #155
    Senior Member Elderly's Avatar
    Join Date
    Oct 2013
    Location
    UK
    Posts
    262
    Post Thanks / Like

    Re: EM1 4.0 Firmware Upgrade

    Thanks Dave but that extract is for Focus Bracketing and not for Focus Stacking.

    My crude attempt at focus stacking last night obliquely shooting the spines of books on a shelf and starting with the focus in the centre of the row/frame, demonstrated that the focus moves both further from and closer to the camera, and is automatically limited to eight shots (not enough to get a perfect result in that particular situation).
    It implies from the wording in your cut and paste for focus bracketing, that the focus moves successively FURTHER from the initial focus distance set; so to achieve the same result of having all the spines in focus using bracketing, the initial point of focus should be on the closest book and the focus point will move further away for each of the user chosen number of shots; I've not tried that.

    But back to Stacking and my initial question which I'm having trouble putting into words:
    I shot my row of book spines with a vertical 'film plane' so there was only one plane of focus to follow, but what if the camera was also pointing upwards or downwards as well as along the row, how would the camera know which of the two planes of focus it should choose (from top to bottom of the spines, or closest to furthest book)?

    I also can't fathom out how the merging works (I can't fathom much out ),
    looking at each of the eight individual frames that make up the stack, very few appear to have any point in focus at all!!!
    Ian.

  6. #156
    Senior Member f6cvalkyrie's Avatar
    Join Date
    Feb 2009
    Location
    Belgium
    Posts
    1,643
    Post Thanks / Like
    Images
    29

    Re: EM1 4.0 Firmware Upgrade

    Quote Originally Posted by Elderly View Post
    Thanks Dave but that extract is for Focus Bracketing and not for Focus Stacking.

    My crude attempt at focus stacking last night obliquely shooting the spines of books on a shelf and starting with the focus in the centre of the row/frame, demonstrated that the focus moves both further from and closer to the camera, and is automatically limited to eight shots (not enough to get a perfect result in that particular situation).
    It implies from the wording in your cut and paste for focus bracketing, that the focus moves successively FURTHER from the initial focus distance set; so to achieve the same result of having all the spines in focus using bracketing, the initial point of focus should be on the closest book and the focus point will move further away for each of the user chosen number of shots; I've not tried that.

    But back to Stacking and my initial question which I'm having trouble putting into words:
    I shot my row of book spines with a vertical 'film plane' so there was only one plane of focus to follow, but what if the camera was also pointing upwards or downwards as well as along the row, how would the camera know which of the two planes of focus it should choose (from top to bottom of the spines, or closest to furthest book)?

    I also can't fathom out how the merging works (I can't fathom much out ),
    looking at each of the eight individual frames that make up the stack, very few appear to have any point in focus at all!!!
    my first tests with focus stacking seem to indicate the same ... after the first shot, taken at the focus distance you choose, the next distances will be shorter (3x), and then longer ... so if you focus on the closest point, you basically have 3 useless shots in your series ...
    My advice : focus in the middle, or a little closer, and choose the f-value and focus differential wisely ...

    Olympus could have found a more intelligent way, it seems to me ! Like : choose closest focus, choose furthest focus, and let the camera calculate optimum focus differential and f-value ...

    But, that's only my idea ...

    CU,
    Rafael
    E-M1/GH2/G1 Full Spectrum & lots of lenses
    http://www.flickr.com/photos/f6cvalk...th/9226689839/
    Likes 2 Member(s) liked this post

  7. #157
    Senior Member
    Join Date
    Dec 2007
    Location
    Jerusalem, Israel
    Posts
    1,282
    Post Thanks / Like

    Re: EM1 4.0 Firmware Upgrade

    OK, here's my stab at seeing what focus bracketing/stacking will do for me and how it works:

    The revised manual includes a few pages on new stuff in release 4.0. This is only part of it. Focus bracketing is one more kind of multishot bracketing. You can set it up and only use it when you set bracketing ON. When bracketing is OFF it will not interfere with normal shooting. I only tried stacking, which creates and combines 8 jpegs. The closest one is taken at the focus position you select (I used the touch screen, and touched the nearest object in the scene). The rest are taken at distances incremented by a number from 1 through 10. There is no explanation of whether this is object distance, amount of lens movement, or what. Only that 1 is small changes and 10 is big. Working with scenes that had a range of 2-3 meters, using the 12-50 at 12 or 14 mm focal length, "1" was plenty. I had my camera set for RAW only and after shooting, I found 8 ORFs, 8 JPEGs interspersed and the 9th JPEG (incrementing the frame number one more) was the combined result. You can look at JPEG #8 and see if anything was usefully in focus. If not, reduce the focus increment.

    Here's one result:

    PB281593 by scott kirkpatrick, on Flickr

    click thru to see it on a larger scale. I uploaded the jpeg at 100%.
    Was it worth the trouble? For comparison, here is the same scene shot in a single exposure at f/8, focused on the dry flowers in the middle:

    PB281630 by scott kirkpatrick, on Flickr

    scott
    Likes 1 Member(s) liked this post

  8. #158
    Senior Member Elderly's Avatar
    Join Date
    Oct 2013
    Location
    UK
    Posts
    262
    Post Thanks / Like

    Re: EM1 4.0 Firmware Upgrade

    Rafael starts with the focus in the middle or a little closer
    and Scott starts at the closest point.

    My take on the manual is that for Bracketing you should start at the closest point,
    but for Stacking it is best to start around the middle.
    Ian.
    Thanks 1 Member(s) thanked for this post

  9. #159
    Senior Member
    Join Date
    Dec 2007
    Location
    Jerusalem, Israel
    Posts
    1,282
    Post Thanks / Like

    Re: EM1 4.0 Firmware Upgrade

    The manual has a page on bracketing (up to 99 shots, put them together yourself afterwards, extending out from the closest object with an interval that you set ranging from 1 to 10). Followed by a page on stacking, where it puts 8 jpegs together. It only says "automatically changing the focus point slightly for each frame and merged to create an image that is focused on broad range from near to far field." This doesn't say the ordering of the images or whether or not the scale that you set for bracketing is used to space the stacked shots. The bracketing scale does influence the range over which the camera varies focus in doing stacking -- I could see that in the experiments that I did for the previous post. But...

    You have to look at the 8 shots that end up on the chip to see what it is actually doing. So this time, I shot a tape measure, extended for a meter or so, and used 80mm focal length, @f/2.8. It seems to do the following. The first shot is at the point of focus. Then two shots are taken nearer to the camera and then five more further away. When the distance increment is 1 and I focused about a meter away, the regions in focus at f/2.8 and 80 mm overlapped. When the distance increment was set to 3 they didn't quite overlap. So I conclude that for stacking you should focus about 1/3 into the region of interest, and set the distance scale to match the lens focal length and f/stop to be used, by experimenting.

    scott
    Likes 2 Member(s) liked this post

  10. #160
    Senior Member
    Join Date
    Dec 2007
    Location
    Jerusalem, Israel
    Posts
    1,282
    Post Thanks / Like

    Re: EM1 4.0 Firmware Upgrade

    Reading the earlier posts more carefully, I see that Rafael and I have come to the same conclusions about the stacking algorithm.

    scott
    Thanks 1 Member(s) thanked for this post

  11. #161
    Member zensu's Avatar
    Join Date
    Feb 2014
    Location
    Montgomery, AL, USA
    Posts
    21
    Post Thanks / Like

    Re: EM1 4.0 Firmware Upgrade

    Thanks to you guys and gals for helping clarify how "Focus Bracketing" and "Focus Stacking" actually function. It will help save me from doing this !
    Bobby
    Bobby
    "Reality leaves a lot to the imagination." John Lennon

  12. #162
    Super Duper
    Senior Member
    Knorp's Avatar
    Join Date
    Dec 2007
    Posts
    3,991
    Post Thanks / Like

    Re: EM1 4.0 Firmware Upgrade

    In line with Scott's observations I found distant settings 1-2-3 to be fine for short distances to subject.

    Lens 60mm @2.8 | distance approx 1 mtr | distant increments ranges from 1 to 5.

    Click image for larger version. 

Name:	EM1_Z60_D01.jpg 
Views:	29 
Size:	834.2 KB 
ID:	114603 D=1 Click image for larger version. 

Name:	EM1_Z60_D02.jpg 
Views:	21 
Size:	880.2 KB 
ID:	114604 D=2

    Click image for larger version. 

Name:	EM1_Z60_D03.jpg 
Views:	25 
Size:	904.4 KB 
ID:	114605 D=3 Click image for larger version. 

Name:	EM1_Z60_D04.jpg 
Views:	23 
Size:	931.5 KB 
ID:	114606 D=4

    Click image for larger version. 

Name:	EM1_Z60_D05.jpg 
Views:	22 
Size:	944.6 KB 
ID:	114607 D=5
    Bart ...
    Thanks 2 Member(s) thanked for this post

  13. #163
    Senior Member
    Join Date
    Dec 2007
    Location
    Jerusalem, Israel
    Posts
    1,282
    Post Thanks / Like

    Re: EM1 4.0 Firmware Upgrade

    Bart, you've got the right equipment for this piece of reverse engineering. I don't have a LensAlign ruler. What are the dimensions in mm of the gradations that you show?

    I assume you focused on the 0 point (the bright white line) in each shot? And what is the depth of focus on the lensalign scale for a single shot? (In my 80 mm f/2.8 test, it was about 5 cm.) I wonder if the focus changes that they make are keyed to the depth of field (which would mean a dependance on focal length and on aperture) or are just fixed distances. To test this would require shooting with the 60 macro at, say 5.6, stacking with 1 unit, and then with the zoom at maybe 18mm, f/2.8. Want to try it?

    scott

    EDIT: Notice when you set the increment to 5, the steps were bigger than the depth of field of a single shot, leaving blurry portions at +20, +7.5 -5 and -14. I bet if you ran 5 units at f/5.6, those blurs would sharpen right up, and the total area covered would stay the same -- meaning that the units are actually lengths. That still leaves the question of whether the lengths are scaled to the distance at which you initially focus. Oh well, experiments still needed to use this.
    Thanks 1 Member(s) thanked for this post
    Likes 1 Member(s) liked this post

  14. #164
    Super Duper
    Senior Member
    Knorp's Avatar
    Join Date
    Dec 2007
    Posts
    3,991
    Post Thanks / Like

    Re: EM1 4.0 Firmware Upgrade

    Quote Originally Posted by scott kirkpatrick View Post
    Bart, you've got the right equipment for this piece of reverse engineering. I don't have a LensAlign ruler. What are the dimensions in mm of the gradations that you show?

    I assume you focused on the 0 point (the bright white line) in each shot? And what is the depth of focus on the lensalign scale for a single shot? (In my 80 mm f/2.8 test, it was about 5 cm.) I wonder if the focus changes that they make are keyed to the depth of field (which would mean a dependance on focal length and on aperture) or are just fixed distances. To test this would require shooting with the 60 macro at, say 5.6, stacking with 1 unit, and then with the zoom at maybe 18mm, f/2.8. Want to try it?

    scott

    EDIT: Notice when you set the increment to 5, the steps were bigger than the depth of field of a single shot, leaving blurry portions at +20, +7.5 -5 and -14. I bet if you ran 5 units at f/5.6, those blurs would sharpen right up, and the total area covered would stay the same -- meaning that the units are actually lengths. That still leaves the question of whether the lengths are scaled to the distance at which you initially focus. Oh well, experiments still needed to use this.
    Hi Scott,

    the way this ruler works is that you focus on a vertical plane that's aligned to the 0 on the ruler, so the nil mark is the point of focus.
    From 0 to 16 on the ruler is approx. 50,5 mm. Mind you the ruler was at a 20 degree angle for the test.
    And I agree using f5.6 or perhaps even better f8.0 will cover the in-between blurry areas when using increment 5, be it at the cost of subject isolation.


    But why 18mm ?
    I'd like to do some more testing, but not tonight.

    Kind regards.
    Bart ...

  15. #165
    Senior Member
    Join Date
    Dec 2007
    Location
    Jerusalem, Israel
    Posts
    1,282
    Post Thanks / Like

    Re: EM1 4.0 Firmware Upgrade

    If the increment in the focus bracketing menu (1 to 10) is distance, then changing the f stop without changing the focal length would fill in the soft gaps when you need more depth, but the centers of sharp focus would be in the same place in the individual jpegs. If it is drawn from a table of the depth of field at the focal length and aperture set, then the jpegs would stretch further when the fstop is set higher or you choose a shorter focal length. Of course the simplest answer is just to try it out, find something that works, and stick with it.

    scott

  16. #166
    Senior Member
    Join Date
    Apr 2008
    Posts
    1,446
    Post Thanks / Like

    Re: EM1 4.0 Firmware Upgrade

    My initial attempts focus stacking on a small nature walk with the 12-40 pro. f2.8 used as in low light and closeup at 40mm (80mm effective)
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	P1240892.jpg 
Views:	19 
Size:	329.3 KB 
ID:	115958  
    Likes 3 Member(s) liked this post

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •