Celestron Popular Questions, Answers, Tips & Manuals

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Why not look at the old battery, or look in the manual ?

It is impossible to assess the weight (or more correctly Mass of a star, as weight is a perceived function of Earth's gravity) without knowing the chemical make up of the star. That is why astronomers use the star's measured albedo to qualify and quantify them.

Read the manual. Follow the instructions therein.

You may find you have to aim it at the sky yourself - sounds as if the calibration may be 180 degrees out

I WOULD CONTACT THE MANUFACTURER ON THIS.

Have you looked in the manual ?

Try formatting the card(s)

There are adapters, but normally a 2" collimation tool is way way too heavy for a .965 eyepiece holder. Most of the eyepiece holders are made from plastic, and they break fairly easily, so you take a big chance of your 2" collimation tool dropping to the floor or concrete. Even if the plastic did not break, the weight of the collimation tool would bend the eyepiece holder out of position. It only takes the slightest amount to make your test worthless - after all, you're after precision. Bending or distorting anything destroys the precision. They do make 1.5" collimation tools, and there are adapters to get from the tool to your eyepiece holder. They also make things called "cheshire eyepieces" and regular collimating tools which will work with your 4" reflector.

Most problems will be overcome by reading and absorbing the instruction manual. Assuming the telescope is in good order, it must first be pointed at a light source using the spotter scope and then aligned using the lowest power eyepiece before fitting the high powered eyepiece... You also should be in very low light conditions.

Do you mean resolving power or magnification power ?

You don't give any brand name or model number of some "microscope" Most microscopes have no SD card slot, so yours must have a camera inside it and a memory recording unit for taking shots.. Contact the maker, whoever that is, for customer support that you already paid for. That is all that can be suggested from so few details.

Please do so

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With the setup you have, you are attempting a magnification of x 750, which is way beyond the capabilities of your scope. A realistic limit to usable magnification is x 250, or about what you will get if you take the barlow off and just use the 4mm lens.The 127mm aperture on that scope does not gather enough light to do more. Even that depends on good seeing, that is, clear air and no light pollution. It is a great shame that scopes are marketed with outlandish claims as to magnification. You certainly will see a magnification of x 750 in daylight, when there is lots of light, but they don't tell you that trick. I have a 200 mm scope, with a practical limiting magnification of x 400, and I find that almost impossible to use. The viewing object is hard to find and keep centred in the eyepiece, it wobbles around, it soon disappears due to the rotation of the heavens, and is dim and blurry. I keep to magnifications of about x 250 max. .

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Most moving microscope stages have a locking lever on one side or another of the ways (the sliding interface between stage and body or stand). If none then there might be some small tensioning screws that adjust the drag in the ways.

Use the finder scope to locate the object in question, then main scope will be aligned for magnified viewing.