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Stacking anomoly

Posted: 15.07.2018 16:49
by Earlyman1953
Please look at the attached image. It is a stack of 75 images using the "C" rendering method. (It gave the best results of the three methods). Notice the hairs at the top of the head in between the eyes. Why are they blurred? The individual images show all of the hairs to be in focus. I tried two stacks, one with 75 images and another with 150 images, both with the same results. Does the magnification have anything to do with it? This image was shot at 3X. I shot this same insect at 1X and the were not out of focus areas.
Canon 5D II with MP-E 65m

Re: Stacking anomoly

Posted: 17.07.2018 16:32
by Stas Yatsenko
Please upload your stack to our server as described at
If you are user of GoogleDrive, DropBox, OneDrive or other cloud service, you can upload your files there and send us a link.

Re: Stacking anomoly

Posted: 23.01.2019 04:02
by Falk Lumo
Hi, there are several such threads here in the forum, regarding stacking imperfections.

As they are quite common depending on the circumstances, it would be very helpful if we could learn from these case studies.

However, you ask to upload the example to your server and then never report back about your findings. I find this rather frustrating.

In particular, I‘d like to learn if increasing #images in a stack is a safe method to increase quality?

Re: Stacking anomoly

Posted: 29.01.2019 13:30
by Stas Yatsenko
We try to comment on user stacks but we just do not get them sometimes. There are several reasons for bad results, some of them could be fixed, some not. For example, some artifacts are caused by misalignment of source images. Enabling rotation or chaning other alignment params could help. There are also some optical effects, when blurred foreground objects mask background details. The program does not have enough data to compile perfect result in this case.

As to your question, more does not mean better. Focused areas in source images should overlap so that the program has enough information. But there is not sense to make more source images than that. We recommend to use the smallest aperture which provides good resolution (usually F8-F11) and find optimal focusing step using method described here (