A $150 400X monocular "student grade" microscope: https://www.sciplus.com/400x-student-grade-monocular-microsc...
A $334 (up to) 1000X binocular "top quality" student microscope: https://www.sciplus.com/top-quality-student-binocular-micros...
Or, at microscope.com there are several in your price range. Here is an example, an Omano 40X-1000X Student Monocular Compound Microscope for $179: https://www.microscope.com/popular-microscopes/omano-om118-m...
I love ASS, its one of the best stores in the US. If you have a chance to visit one I would highly recommend it. Their product labels are cheeky and adorable and they have all sorts of wonderful, random shit
The full name leads to a wonderful acronym
DSLRs are nice, excellent image quality, but quite expensive and heavy for the job.
As for using a DSLR with the microscope, I'm guessing it might have similar issues as astronomy. When attaching the camera to the telescope (possibly same for microscope), you lose the magnification of the eye pieces. The image data is hitting the tiny tiny pixels of the DSLR so that the scale of things will be very small in your high megapixel image. This is why so many people prefer lower resolution cameras as the pixel sizes on the sensor are much larger. Just based on experience with optics, I'd imagine this would hold true to microscopes as well.
I can't imagine having to move the <thing that you're watching> with your own hands...
But then again, maybe I'm just spoiled, since I'm used to the microscopes that we have at the university aka. higher budget (>1000€).
Still to anyone looking to buy a microscope, I would very highly recommend that they get one with knobs to move the table.
Do you know of any good sellers that sell in Europe?
https://amscope.com/collections/compound-microscopes/product...
Upsides: HMDI out, straight to your TV. Should include an adjustable ring LED with the scope. Real time images (ie. video of moving things), smooth zoom (so you don't lose the subject), >100-200x magnification, and at very low cost. Inherently social.
Better models allow saving of stills or images, but I'd say avoid that and go cheap, just take images of the screen with a mobile phone or buy an HDMI capture device if your really want to add that later. The actual microscope places hate this product category, because it undercuts their out of date lowball analog optical microscopes.
The downsides are that you can't use conventional objectives, you don't know precise magnification at midpoint positions if you want to do subject measurement, and you can't do some of the fancier stuff ... but then again lowball analog optical microscopes can't either.
See https://forum.inaturalist.org/t/reviews-of-digital-microscop... for examples and discussion.
Its also nice to be able to put the microscope in a case and take it with you while exploring. I used a little flashlight for the stage light, and it worked well.
It's sort of like exploring the night sky with a pair of binoculars before getting a big telescope. Its helps to get oriented first. Then, if your kids are into it, you can upgrade your equipment.
Carson MicroBrite Plus 60x-120x Power LED Lighted Pocket Microscope
https://www.amazon.com/Carson-MicroBrite-60x-120x-Lighted-Mi...
Compound microscopes are much more fiddly because you need to prepare slides, and thus less versatile and less interesting for kids, but that's what's required to view blood cells or fine detail.