February PUG is up
Am 08.02.25 um 06:40 schrieb mike wilson:
I've watched Jostein doing this. His contraption was/is electrically powered, so once the setup is complete, you only need to press the go button. There are a large number of hard parts for this type of work but one of the hardest is preparing the specimen; removing dust and other pollutants, arranging parts (animal subjects are almost invariably deceased) and otherwise posing and lighting.
I seem to remember that Jostein's rig could have both the number and size of the increments altered. Difficulties include calculating the depth oo movement such that you do not run out of focus, leaving either the front or rear of the subject blurred.
Ah, well.... So we're talking about a macro rail, a stepper motor and
driver electronics, some computer software and, essentially, a dead
subject.
Thanks for enlightening me.
Ralf
--
Ralf R. Radermacher - Köln/Cologne, Germany
Blog :http://the-real-fotoralf.blogspot.com
Audio :http://aporee.org/maps/projects/fotoralf
Fotos :https://www.fotocommunity.de/user_photos/770012
The method described is a modern, more automated version of the basic stacking technique. The six-legged image I posted this time is done with a more manual approach. Camera on tripod,(live) subject quite still. Bugs/butterflies etc. don’t move much below 55° F. Flowers don’t move much when there is no breeze. Focus on front edge of subject, or even a little closer, take first frame. Advance just very slightly, take 2nd frame. Repeat until focal point is well behind the subject. Stack and view in the proper software. Delete frames that are not contributing to the overall, repeat the stack-and-view. Repeat until it looks good to you.
I have seen some exceptional “product photography” stacked images, e.g., an image of a Rolex watch that was incredible. So the subject needn’t be “deaed”, just very very still.
Stan
On Feb 8, 2025, at 8:57 AM, Ralf R Radermacher pdml@uebra.de wrote:
Am 08.02.25 um 06:40 schrieb mike wilson:
I've watched Jostein doing this. His contraption was/is electrically powered, so once the setup is complete, you only need to press the go button. There are a large number of hard parts for this type of work but one of the hardest is preparing the specimen; removing dust and other pollutants, arranging parts (animal subjects are almost invariably deceased) and otherwise posing and lighting.
I seem to remember that Jostein's rig could have both the number and size of the increments altered. Difficulties include calculating the depth oo movement such that you do not run out of focus, leaving either the front or rear of the subject blurred.
Ah, well.... So we're talking about a macro rail, a stepper motor and driver electronics, some computer software and, essentially, a dead subject.
Thanks for enlightening me.
Ralf
--
Ralf R. Radermacher - Köln/Cologne, Germany
Blog :http://the-real-fotoralf.blogspot.com
Audio :http://aporee.org/maps/projects/fotoralf
Fotos :https://www.fotocommunity.de/user_photos/770012
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Great photos in this PUG - Bob Walkden's stands out as my fave.
Regarding my shot - the camera was on a focus rail and moved to change the plan of focus. It's just a manual rail, though one that is capable of precise adjustment. I put a small spring clamp on the knob that allows the rail to be moved in very small increments - sort of like the old Pentax 6x7 speed focusing accessory. And in full disclosure the 135 exposures were in two stacks - two runs of about 65 each, with the corresponding output files stacked for the final product. My standard procedure is to do one stack from front to back and another from back to front. Combined using Affinity Photo's focus merge tool.
The SMC 24mm f3.5 is amazing when reverse mounted on the K3.
Mark C.
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On Friday, February 7th, 2025 at 1:17 PM, Ralf R Radermacher pdml@uebra.de wrote:
Am 07.02.25 um 10:49 schrieb Brian Walters:
G'day all
Some truly spectacular and innovative submissions this month.
Enjoy the gallery here:
What an exquisite collection of great shots, with the obvious exception
of the sillyness posted by yours truly. Kudos to one and all.
I'm still fascinated by Mark's wasp. How is this done with a manual
focus lens? Adjusting the focus in 135 microskopic steps? My mind
boggles. Please explain.
Ralf
--
Ralf R. Radermacher - Köln/Cologne, Germany
Blog : http://the-real-fotoralf.blogspot.com
Audio : http://aporee.org/maps/projects/fotoralf
Fotos : https://www.fotocommunity.de/user_photos/77001
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Am 08.02.25 um 17:37 schrieb Mark C:
Great photos in this PUG - Bob Walkden's stands out as my fave.
Exactly. I just forgot to mention it in all my astonishment about those
focus stacking shots.
Ralf
--
Ralf R. Radermacher - Köln/Cologne, Germany
Blog : http://the-real-fotoralf.blogspot.com
Audio : http://aporee.org/maps/projects/fotoralf
Fotos : https://www.fotocommunity.de/user_photos/770012
On 8 Feb 2025, at 16:37, Mark C MarkC006@protonmail.com wrote:
Great photos in this PUG - Bob Walkden's stands out as my fave.
Thank you! Full disclosure: I had to amputate several legs to get it.
wait .. you didn't amputate enough.. what about the table?
classy photo, even if you did cheat.. :-)
ann
On 2/8/2025 12:58 PM, Bob W PDML wrote:
On 8 Feb 2025, at 16:37, Mark C MarkC006@protonmail.com wrote:
Great photos in this PUG - Bob Walkden's stands out as my fave.
Thank you! Full disclosure: I had to amputate several legs to get it.
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On Feb 8, 2025, at 12:59 PM, Bob W PDML pdmlbw@icloud.com wrote:
On 8 Feb 2025, at 16:37, Mark C MarkC006@protonmail.com wrote:
Great photos in this PUG - Bob Walkden's stands out as my fave.
Thank you! Full disclosure: I had to amputate several legs to get it.
-I think it was worth it!
Stan
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