Some trouble with stacking artifacts...

JH · Post by JH » Tue Jan 12, 2016 3:43 pm

Hi Pau

OK - If I do not remember wrong I get similar results at 1/200 sec, thats why I started to use the studio flash at only 1/100 sec. This is never a problem with my Canon flash but it eats batteris and gets quite hot when used for stacking.

Interesting video in your link;

Pau wrote: Here you have a link to a most interesting video illustrating how the shutter works:
http://www.photomacrography.net/forum/v ... hp?t=27819

Regards Jörgen

etalon · Post by **etalon** » Sun Jan 17, 2016 1:20 pm

Hello back,

now I could do some tests with the new camera, Olympus OM-D EM5 mk2. It´s a very good camera and compared to my 5D2 pretty tiny. The camera have only a quarter FOV to the 5D2 but on this area a three times higher resolution in high res mode! For a 10x objective, this is pretty much oversampled, but for 20x and 50x it would be ok...
Well, the upper left corner is a very little unsharp than the other corners, but I can deal with it. Because of the oversampling, structures are pictured soft, but at usable resolution it looks all pretty sharp. There is no noise and no vibration during work.

I did also some Sorbothane damper under the breadboard (as Rik mentioned).

Here the test shots:

All corners and the middle at 100% crops, ZS DMap stack, 63MP high res shot:

And the entire FOV downsized to 1024px:

I´m pretty statisfied with that camera. Now I going to do some photography...

Cheers Markus

Pau · Post by **Pau** » Sun Jan 17, 2016 1:27 pm

For a 10x objective, this is pretty much oversampled, but for 20x and 50x it would be ok...

In fact it will be just the opposite: Usually you will get more resolution on the subjet side (higher NA) but less sharpness on sensor due to smaller effective F number (for usual objectives, of course)

etalon · Post by **etalon** » Mon Jan 18, 2016 11:11 am

In fact it will be just the opposite: Usually you will get more resolution on the subjet side (higher NA) but less sharpness on sensor due to smaller effective F number (for usual objectives, of course)

Ok, thanks for clarification.

Now I can present the very first result with the new combo. I´m not sure, what it is, but I think it´s gypsum. FOV is ca. 1.7mm, ZS PMax, 130 layer stack, Mitutoyo Plan Apo 10x, Raynox150 reversed, Olympus OM-D EM5 mk2 in high res mode:

Cheers Markus

etalon · Post by **etalon** » Thu Jan 21, 2016 10:39 am

...and here we go...

Langit xx, FOV is ca. 1.7mm, ZS PMax, 72 layer stack, Mitutoyo Plan Apo 10x, Raynox150 reversed, Olympus OM-D EM5 mk2 high res mode:

Cheers Markus

JH · Post by JH » Thu Jan 21, 2016 10:44 am

Looks fine to me.
Regards Jörgen

ChrisR · Post by **ChrisR** » Thu Jan 21, 2016 7:09 pm

Withan image what, 8000 pixels wide(?) it would e nice to see a 100% crop

1024 hopefully doesn't do it justice.

etalon · Post by **etalon** » Fri Jan 22, 2016 5:08 am

Thank you, Jörgen!

Chris, here is an 100% crop from near the middle of the pic:

The original have 63MP. That is a very little to much for the forum...

Cheers Markus

ChrisR · Post by **ChrisR** » Fri Jan 22, 2016 6:18 am

That's better, thanks

By the way, they say 40MP

What dimenson images does the camera produce in high res mode??

Anr EIGHT shutter-firings per frame

. What's the shutter life?

You could be the first to do a 10,000 image stack. Before stitching

.

etalon · Post by **etalon** » Fri Jan 22, 2016 7:12 am

It's 40MP for JPG. In RAW you get 63MP frames...

In RAW I get 9216x6912 pixel resolution in high res mode. But the files are pretty huge - 320MB as TIFF. Therefor stacking take a long time, also with a fast machine...

I don't know about shutter life, but there is no mechanical shutter I use, so I hope there is a pretty long life time.

For high resolution the camera take 8 pics and move the sensor between each shot for a half pixel amount. Than the camera calculate a high res frame from that 8 shots.

I like the camera for photomicrography...

Cheers Markus

etalon · Post by **etalon** » Fri Jan 22, 2016 3:15 pm

...and one more:

Vanadinit x, FOV is ca. 1.7mm, ZS PMax, 64 layer stack, Mitutoyo Plan Apo 10x, Raynox150 reversed, Olympus OM-D EM5 mk2 high res mode:

Cheers Markus

pierre · Post by **pierre** » Sat Jan 23, 2016 3:52 am

Very fine result with your Langit xx Markus

The trouble with stacking artifacts... seems gone

Well done.

etalon · Post by **etalon** » Sat Jan 23, 2016 2:29 pm

Thank you Pierre!

The trouble with stacking artifacts... seems gone Wink

Yes, it seems like most of them are gone...

Here is the evidence:

The Uranophane xx I posted with problems before. FOV is ca. 1.7mm, Helicon C, 93 layer stack, Mitutoyo Plan Apo 10x, Raynox150 reversed, Olympus OM-D EM5 mk2 high res mode:

Cheers Markus

pierre · Post by **pierre** » Sun Jan 24, 2016 3:43 am

Great work indeed.
You are ready to open your own gallery Markus

etalon · Post by **etalon** » Mon Jan 25, 2016 11:49 am

Thanks Pierre.

Than I´ll go on to fill my gallery...

Azurite x, FOV is ca. 1.7mm, Helicon C, 63 layer stack, Mitutoyo Plan Apo 10x, Raynox150 reversed, Olympus OM-D EM5 mk2 high res mode:

Cheers Markus