Review: Celestron Digital Microscope

BloodCells.jpg
Human blood cells

Roger has always excelled in math and sciences — no surprise given lineage — and is of the age (9) where the science education is moving into bigger and smaller areas of study.

So far, he has gotten by with a QX-5 Digital Microscope
and mixScope. While the QX-5 is great for looking at money, the veins in leaves, bits of mushroom and tiny critters, high magnification is pretty much useless because the construction makes focus impossible.

Thus, the desire to get something more like a real microscope. In particular, I really wanted a microscope that allows for live viewing on a computer screen (like the QX-5). While, there were some good ones for less than $500 — 3MP digital camera model microscopes that included simultaneous use binocular eyepieces, even — their software is pile of Windows only crapware.

No, thank you. Next!

SpinalColumn.jpg
Close-up of cross section of spinal column.

Enter the Celestron 44340 LCD Digital LDM Biological Microscope. It replaces the normal eyepiece with a 2.1MP digital camera and a color LCD screen. More importantly, the build quality is actually quite decent such that focusing at, even, the 400x maximum optical zoom is quite smooth!

Unlike the QX-5, the Celestron 44340 is really only for use with proper microscope slides (The QX-5 still has a purpose!). blank microscope slides and slide covers are cheap, so I picked up a bunch of those, too.

The slide table includes a very nice set of caliper style adjusters for moving the slide around in a highly controlled fashion. Slides are held in place by an easy to use spring loaded caliper.

The microscope can illuminate the subject from either the top or bottom and the bottom illumination includes a variety of color filters that can be quite useful. Intensity of illumination can be adjusted.

The top illumination is nearly useless at all but the lowest magnification (otherwise there isn’t enough distance between lens and subject).

The digital controls include an EV adjustment, a digital zoom, and the ability to take snapshots. Digital zoom only works when the snapshot resolution is configured for less than 1600×1200. Digital zoom works by interpolating data across the sensor into a lower-than-sensor resolution image that provides a higher-than-optical zoom factor. It actually works fairly well (unlike most digital zooms).

Pollen.jpg
Pollen. Evil, evil, pollen.

The unit also comes with a really nice hard sided carrying case, a dust cover, and power adaptors for global use. A surprisingly complete kit — I was completely blown away by the quality of the case for a device this relatively inexpensive.

My only real complaint is that the LCD is effectively physically attached to the camera & lenses. That, combined with the relative stiffness of the buttons means it is hard to take an image that isn’t blurry. However, it seems that the unit has a slight delay between button push and recording such that is isn’t as big of a problem as it could be. But, still… stupid design — just move the damned shutter button to the base. I’ll probably hack the unit to add an external shutter button.

All in all, I’m thoroughly impressed by the build quality and feature set of this microscope. I would still have been impressed if my $180 had purchased a microscope with this optical performance, sans awesome case and really nice slide table.

All of the images in this blog post were taken with the microscope, no surprise. It is a boxed set of prepared slides that I also picked up from Amazon.





2 Responses to “Review: Celestron Digital Microscope”

  1. John C. Randolph says:

    I’m imagining that microscope with a dock for an iPad instead of the LCD they used.

    -jcr

  2. Jaspers says:

    I have the same model and have been quite happy with it for all the reasons that you mention….with some of the same exceptions as well….since you mentioned hacking the shutter switch, i wonder if you have also considered or heard of anyone successfully modding to output directly to an external monitor? i had really hoped for this functionality when i purchased the scope but had done enough research that i wasn’t surprised the salesman was completely wrong about that capability…..as far as I can tell, the usb port has no bus-type connection to the display (rather the hd itself) so that’s prolly a no go……maybe yank the wiring that runs into the built-in monitor and rig a vga adaptor? i’ve done some searching online and haven’t found anyone that mentions trying anything…..i guess the last option – spend lots more money :-)….interested in your thoughts….thx

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