The 25MM and 16MM lenses were unable to see plankton

[Hello-2877515114]

Hey, friend, I have encountered a problem, I follow the microscope made by the author and it can not magnify to see the creatures in the water, may I ask what is the problem? The lens I use is a combination of 25MM and 16MM, I can not use it correctly, may I ask what is the error, what is the problem?

[Hello-2877515114]

It is so big that I can't see living things in the water

[ethanjli]

Which version of the PlanktoScope hardware (e.g v2.1 or v2.5 or v2.6) do you have?

[Hello-2877515114]

Thank you for your reply. I use version 2.5, and it seems that I cannot observe such small aquatic creatures. Maybe it is also related to my circulation pool, I do not know how to make this circulation pool, and I do not know where to buy it

[ethanjli]

Unfortunately, I'm not familiar with the optics in version 2.5, so I can't help much. If you swap your 25mm and 16mm lenses with each other, what does your camera preview look like?

I don't know what you mean by "circulation pool" - are you referring to the rectangular glass capillary in front of the lens?

[Hello-2877515114]

Yes, my friend, the rectangular glass capillary in front of the lens, there is no big difference between the preview image before and after changing the mirror.

[Hello-2877515114]

I now suspect that I got the capillary size wrong and that it still has a lot of room in the picture