Electronics > Beginners
Issues with my first microscope
Kfire778:
So my first microscope came in, I bought a Eakins Trinocular microscope, but I'm having issues with my eye pieces. When I look through them it's mostly black. What am I doing wrong or is it the microscope?
Habropoda:
Try these:
Remove or fold down any plastic or rubber eyecup, especially if you wear glasses. Maybe remove your glasses. Your eyes need to be closer to the eyepiece.
The distance between the eyepieces can be adjusted. Play with that until the view improves.
Kfire778:
This might sound weird, but the closer I get the less I can see, farther back I go more I can see.
KL27x:
After seeing some of the idiotic things people do with a microscope, I can't be surprised, anymore. Here are some pointers, in no particular order:
1. The eyepieces can be adjusted wider apart or closer together. Humans have a range of interpupillary distance. We are not all the same.
2. When the eyepieces have the correct spacing between them, you will see a single circle. Not two circles.
The microscope is focused by moving the entire head up/down. Unless you change the lens or add lenses (barlow, for instance), the focal distance between lens and object were/when the image is in focus will be static. You do not turn the eyepieces to focus the scope (although initially you might have to adjust them to get the image focused in both eyes, plus you have to adjust them to where the microscope is parfocal if it is a zoom microscope).
Harbropoda's tip is important. I wear glasses, and I have to remove the rubber cup from the eye pieces, altogether. But I can still see an image with the cups on there. It's just a smaller circle with more black around the edges.
Some people can't use a binocular microscope, because they can't correlate the two images unless they are perfectly aligned. Some people can't use a binocular microscope because they are idiots. They might eventually get the hang of it if they used it regularly, but they otherwise can't get one to work without help. I've seen lenses turned upside down, eyepieces completely out of focus with each other, people who couldn't figure out the width between eye pieces is adjustable. All kinds of stupidity. Leave a microscope in given work place and it might get "adjusted" farther and farther away from usability until people complain the microscope doesn't work, anymore, and my naked eyes work better.
If you're experiencing a problem, first off, look thru only one at a time. Don't use both eyes until you get a proper image in one of them.
grizewald:
One thing about a zoom stereo microscope is that even when you have the interpupillary distance correctly adjusted and your eyepieces adjusted for your eyes, the position of your eyes is critical.
Your eyes have to be looking into the eyepieces exactly in the centre. It takes a little time to adjust to keeping your head in the right position at all times. Keep at it, you'll soon get the hang of it!
It's also vital to perform a parfocal adjustment of your microscope. Until you do, the focus will change as you change the zoom factor. Once you have done the parfocal adjustment, you don't need to touch the focal control as you zoom at all, as long as your subject is at the same height. Here's a great guide to parfocal adjustment: https://www.aventools.com/how-to-parfocal-your-stereo-zoom-microscope/
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