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Celestron Research Microscope by Celestron
Digital Photo Product DetailsManufacturer: Celestron Model: 4060 Product features: - Adjustable illuminator with an illuminator with an Abbe 1.25 condenser, iris diaphragm, filters, and holder
- Built-in mechanical stage is 123mm x 153mm and has a movement range of 70mm x 40mm
- Unit has a binocular head 45-degree inclined, 360-degree rotatable, and interpupillary distance of 55mm-75mm
- Four supplied achromatic objectives 4x, 10x, 40, 100xr (oil)
- 10x and 15x eyepieces
Accessories:
Digital Cameras Photo Reviews of Celestron Research MicroscopeCustomer Review: Good value for the money Summary: 4 Stars
You get about as much as can be expected for this price range.
Having the 4x objective (see Meade for example that lacks it) is very desirable. Having a 15x eyepice to give acceptable quality 600x avoids much need to go to the oil immersion lens. Almost everything works quite nicely. I would recommend not using the oil that comes with the microscope - cedar oil. This is an older type of oil that is slightly yellow and harder to clean than modern synthetics. Buy a tube of modern low viscosity immersion oil from Edmund Scientific or similar supplier. I found this oil works great at 1000x and 1500x with this microscope and cleans off reasonably easily with isopropyl alchohol.
I would definitely recommend purchasing this microscope, but also consider the similar featured Revelation III from LW Scientific. It has very slightly superior features, at a slightly higher price, from a company that specializes in microscopes (vs. Celestron, where their customer service knows almost nothing about microscopy; they are telescope experts).
There were a few tiny initial problems with the microscope. One eyepiece had a small optical defect near its periphery. Celestron immediately exchanged it for a flawless one. The iris diaphram came very slightly off center. There are adjusment screws to correct this. The alignment error is so small I haven't bothered fixing it. The color filters, by design, are placed right on top of the (nice) halogen light source. Compare the LW-Scientific model mentioned which has fileter holder and a few other light source advantages.
FYI:
The achromat objectives have the typical (no better, no worse) amount of spherical aberation at the outer edge, giving you about 2/3 of the field of view in sharpest focus for precisely flat specimen (e.g. quality blood smear). This is not a defect at this price range. Apochromat Plan objectives that ahieve 95+% freedom from spherical aberation can cost as much or more for one lens than this microscope costs.
This microscope uses standard lens sizes so it can readily upgrade to better eyepieces and objectives and acommodate kits for specialized microscopy (dark field, phase contrast, etc.), as well accepting standard through the eyepiece digital image capture accessories.
Microscopes
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