Papilio ulysses
Moderators: rjlittlefield, ChrisR, Chris S., Pau
Papilio ulysses
Some light and color in everyday life.
On the underside of the wing, the variety of different scales
in the Odysseus moth is somewhat larger.
Kamera: Nikon D810
Objektiv: NIKON M Plan, 60/0.7 ELWD, 210/0
Belichtungszeit: Blitz
ISO: 250
Beleuchtung: 4 Blitzgeräte
Aufnahmedateiformat (RAW/JPG): RAW
Beschnittsbetrag in % (Breite u. Höhe): 6, 0
Stativ: Reprostand
Aufnahmedatum: 20.01.2020
Herkunft: Nachlass
Artenname: Papilio ulysses
-Infos zu Multishot-Techniken: Stack
Stacking Software / - Methode: Zerene Stacker / PMax
Abbildungsmassstab: 60:1
Objektseitige Bildbreite (mm): 0.56
Stacktiefe (mm): 0.06
Anzahl Stackschritte: 120 (pro Schritt 2 Bilder = Total 240)
Stackschrittgrösse (mm): 0.000496
Here in higher resolution:
http://files.homepagemodules.de/b649264 ... gGYQFu.jpg
Kurt
On the underside of the wing, the variety of different scales
in the Odysseus moth is somewhat larger.
Kamera: Nikon D810
Objektiv: NIKON M Plan, 60/0.7 ELWD, 210/0
Belichtungszeit: Blitz
ISO: 250
Beleuchtung: 4 Blitzgeräte
Aufnahmedateiformat (RAW/JPG): RAW
Beschnittsbetrag in % (Breite u. Höhe): 6, 0
Stativ: Reprostand
Aufnahmedatum: 20.01.2020
Herkunft: Nachlass
Artenname: Papilio ulysses
-Infos zu Multishot-Techniken: Stack
Stacking Software / - Methode: Zerene Stacker / PMax
Abbildungsmassstab: 60:1
Objektseitige Bildbreite (mm): 0.56
Stacktiefe (mm): 0.06
Anzahl Stackschritte: 120 (pro Schritt 2 Bilder = Total 240)
Stackschrittgrösse (mm): 0.000496
Here in higher resolution:
http://files.homepagemodules.de/b649264 ... gGYQFu.jpg
Kurt
Last edited by Guppy on Tue Jan 21, 2020 7:57 am, edited 1 time in total.
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Hello Chris
0.000496mm is the shortest step that the StackShot can take.
The steps are measured very unevenly and sometimes they go back.
Since I work for photography on the repro stand and not on the microscope, I have tremors. Even if the StackShott doesn't take a step, the focus changes.
If I take several pictures in one step of the StackShot, they are not identical.
If I take 2 pictures, or more with each step of the StackShot, the step size is smaller.
This does not increase the resolution, but the picture becomes sharper and clearer.
Kurt
0.000496mm is the shortest step that the StackShot can take.
The steps are measured very unevenly and sometimes they go back.
Since I work for photography on the repro stand and not on the microscope, I have tremors. Even if the StackShott doesn't take a step, the focus changes.
If I take several pictures in one step of the StackShot, they are not identical.
If I take 2 pictures, or more with each step of the StackShot, the step size is smaller.
This does not increase the resolution, but the picture becomes sharper and clearer.
Kurt
If you need more stability and smaller step sizes, you might want to switch to a focus-block setup like mine:
https://www.photomacrography.net/forum/ ... 705#257705
By the way, I liked your picture here so much that I just bought a similar objective, though mine will be the BD version of the ELWD 60x 0.70. I also accidentally found a Nikon 60mm 0.80 210/0 for $89 so I got that too, who could resist that?
https://www.photomacrography.net/forum/ ... 705#257705
By the way, I liked your picture here so much that I just bought a similar objective, though mine will be the BD version of the ELWD 60x 0.70. I also accidentally found a Nikon 60mm 0.80 210/0 for $89 so I got that too, who could resist that?
- rjlittlefield
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Be sure to set your StackShot into High Precision mode, for the reasons discussed at https://www.photomacrography.net/forum/ ... hp?t=16323 .Guppy wrote:0.000496mm is the shortest step that the StackShot can take.
The steps are measured very unevenly and sometimes they go back.
I have never seen a StackShot move backward in the middle of a sequence, so I'm guessing the observation that steps sometimes go back is caused by catching a tremor in the repro stand at the wrong time.
--Rik
- rjlittlefield
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I have not tested the StackShot with such a heavy load.Guppy wrote:I stack vertically, from the bottom up and move about 3-4 kg with it.
In general, bottom up is the right way. That way the screw is constantly pushing upward against a strong force. If you were moving top down, then with such a heavy load it could happen that sometimes the rail had to get pushed by the screw and sometimes it would just fall under load. That would produce huge problems.
Could be. The screw should always be turning forward, but maybe if there's some dust that moves around, the nut could fall back sometimes. Or if the thrust bearings had enough irregularity, the screw could fall downward even though it is turning forward.Maybe the StackShot sometimes falls behind?
How large are the backward steps? How does that compare to the differences you see between two shots at the same position? Have you noticed any periodicity or are the backward steps completely random?
--Rik
For me it is primarily interesting how big the steps are at home and not in the laboratory.The steps are measured very unevenly and sometimes they go back.
Since I work for photography on the repro stand and not on the microscope, I have tremors. Even if the StackShott doesn't take a step, the focus changes.
If I take several pictures in one step of the StackShot, they are not identical.
As mentioned, there is vibration at my repro stand, which can be responsible for a back.
Even if the StackShott doesn't take a step, the focus changes, + - 0.0002mm.
If someone closes a door in the house or a truck drives past, it can be up to + - 0.001mm.
As you can see in the picture, none of this is a problem
Kurt
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Re: Papilio ulysses
That is just amazing, especially the veins / checking on the iridescent blue ones. Just a thought for the multiple shots discussion, a rheological lubricant will reduce static friction which otherwise results in seizing and lurching.
Kurt,
I think you are pushing the limits of what the typical commercial focus rails can do. The Stackshot focus rail I had was pretty good, but like the other commercial rails from Wemacro and MJKZZ, had some backlash and wobble (side to side movement). This became more of an issue at high magnifications and resolution like your involved with.
Could the backing up be caused by the rail not moving when commanded, then jumping forward after another move command or two, thus appearing to be backing up? I've seen this effect before and it might be caused by many things, including controller waveform irregularity/distortion, static friction in the rail bearings and even the reduction of incremental torque during micro-stepping as has been actively discussed in another thread.
My experience with the surplus THK KR type rails, they show none of these rail effects including backlash and rail wobble.
Absolutely beautiful image BTW!!
Best,
I think you are pushing the limits of what the typical commercial focus rails can do. The Stackshot focus rail I had was pretty good, but like the other commercial rails from Wemacro and MJKZZ, had some backlash and wobble (side to side movement). This became more of an issue at high magnifications and resolution like your involved with.
Could the backing up be caused by the rail not moving when commanded, then jumping forward after another move command or two, thus appearing to be backing up? I've seen this effect before and it might be caused by many things, including controller waveform irregularity/distortion, static friction in the rail bearings and even the reduction of incremental torque during micro-stepping as has been actively discussed in another thread.
My experience with the surplus THK KR type rails, they show none of these rail effects including backlash and rail wobble.
Absolutely beautiful image BTW!!
Best,
Research is like a treasure hunt, you don't know where to look or what you'll find!
~Mike
~Mike