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Stacking not working, what am I doing wrong?

 
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pentax360



Joined: 10 Jan 2018
Posts: 4

PostPosted: Fri Jan 12, 2018 4:10 pm    Post subject: Stacking not working, what am I doing wrong? Reply with quote

This is my first foray into macro stacking and I’m having some trouble.
I've done some non macro stacking and it’s worked fine.


I’m using an APSC sensor camera with a full frame macro lens, so I don’t know if when using the 1:1 marking on the lens if it’s correct when using the calculator.

I’m taking a photo of a 1 1/4 inch long toy.
The magnification/focus was left unchanged between shots and the camera was moved on a milling machine table.

I used this calculator:
http://extreme-macro.co.uk/focus-stacking/#calculator

I put in APSC, f11, 1:2 (in the calculator I put .5:1), it told me to do steps of 1.881 mm.


I ended up with 25 photos I ran them through zerene, (and also a couple of other stackers) and this is what I end up with.



I’ve tried this a few times with similar results.
What am I doing wrong?
Am I trying to get too much in focus, are my stacks not the right distance?

Any help would be greatly appreciated. Smile
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rjlittlefield
Site Admin


Joined: 01 Aug 2006
Posts: 19090
Location: Richland, Washington State, USA

PostPosted: Fri Jan 12, 2018 4:21 pm    Post subject: Reply with quote

I can see from the dust trails that you have alignment turned on, but it's clear that you have an alignment problem. So then my best guess is that the fuzzy bright bar running vertically across the whole frame is in far background, so it shifts across the subject as you step focus. In that case it's not possible for the software to keep everything aligned at once, and because the bar is big, the software is likely to lock onto the bar at the expense of your subject.

I suggest for starters to place your subject in front of a uniform featureless background. Shoot another stack and see if that works out better for you.

By the way, is this scene supposed to be relentlessly blue, or is there some issue with color balance?

--Rik
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pentax360



Joined: 10 Jan 2018
Posts: 4

PostPosted: Fri Jan 12, 2018 6:12 pm    Post subject: Reply with quote

Thanks that makes sense but I hadn't thought of it. Idea
I'll try another one with a background.

The white balance is fine, it's just in my garage with some off color florescent lights and I didn't bother to correct it.
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pentax360



Joined: 10 Jan 2018
Posts: 4

PostPosted: Sun Jan 14, 2018 12:27 am    Post subject: Reply with quote

That worked!
thanks a lot.





Also I need to clean my sensor Shocked
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rjlittlefield
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Joined: 01 Aug 2006
Posts: 19090
Location: Richland, Washington State, USA

PostPosted: Sun Jan 14, 2018 12:30 am    Post subject: Reply with quote

Looks much better. Yep, there's nothing like focus stacking to make sensor spots visible. Sad

--Rik
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Deanimator



Joined: 23 Oct 2012
Posts: 559
Location: Rocky River, Ohio, U.S.A.

PostPosted: Sun Jan 14, 2018 8:54 pm    Post subject: Reply with quote

rjlittlefield wrote:
Looks much better. Yep, there's nothing like focus stacking to make sensor spots visible. Sad

--Rik

Don't I know it!
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