Question about Premiere Microscopes MRJ-01L Microscope

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Eyepiece and objectives - they seem to be loose.

Hi. Just purchased a MRJ-01L and two things worry me. The eyepiece at the top seems loose (it wobbles) and I thought it would just lift off so a camera could be mounted there. Second problem, the turret that the objectives screw into is wobbly. Is this normal?

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  • KevinTheMan Jan 13, 2008

    Fixed the loose turret - that nut that holds the thing tight was not done up enough. The eyepiece is still loose - hello, anybody there? Heellooo....

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Sir,

There is two kind of eye-piece in microscope one is (push in ) and second one is tread mounted.

As per my i know you have push in eye piece.

See in side that cylinder where you are pusing in this eye piece there is two jows is there it resist to come in as well as when you take it out.that pressure of jows you should be increase.

your problems will short out.

INDRAVIJAY

Posted on Feb 19, 2008

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Posted on Jan 02, 2017

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1 Answer

I need to know how to assemble the eyepiece on a Bushnell 565 telescope?


The eyepiece DOES NOT assemble. It is all one piece. If you unscrew the bottom or the top-- never do this. You must reassemble the lenses exactly.

The eyepiece goes directly into the diagonal (an L shaped device with a mirror inside, and then the diagonal goes into the tube.. That's it. You can buy eyepieces from dozens of different suppliers. Here is one:
http://www.amazon.com/Televue-15mm-Plossl-1-25-Eyepiece/dp/B0001GO15S

Jul 08, 2015 | Bushnell Optics

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I was given a barska 40070 i was assembling it then i came across the barlow lens i tried putting it on my telescope i did but then i went outside i had aligned everything prior to it I looke into the...


A barlow doubles the magnification of the eyepiece and halves the field of view so it it very hard to center an object. Use the lowest power eyepiece (highest number) first. Center the object in the eyepiece, then you can insert the barlow between the scope and the eyepiece. You will be surprised how far off from center you are.

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I need the eyepiece for the vivitar refractor telescope ot accidently was broking when I shipped to the Bahamas


You don't say whether this is an astronomical telescope or a terrestrial one (spotting scope). However, I have a Vivitar scope which was sold as an astronomical scope, but is actually a spotting scope, although it uses astronomical style eyepieces, so...

I am not sure that it is the eyepiece you want, either. It is hard to break an eyepiece, but much easier to break the eyepiece mount or diagonal mirror fitting.

Most astronomical telescopes use a standard fitting eyepiece with a 1.25 inch outside diameter barrel. You can measure the mount where the eyepiece goes to make sure that yours is this size, then search on eBay or Amazon for "1.25 eyepiece" and you will find many available. It doesn't have to be made by Vivitar, any make will fit.

The other variable will be the focal length of the eyepiece, which is what determines it's power. The power of the scope will be the focal length of the main objective divided by the focal length of the eyepiece, so a 9mm eyepiece will give a higher magnification (and be dimmer and harder to focus and find objects) than a 20mm eyepiece. It is usual to have two or three different focal length eyepieces for viewing different objects.

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1 Answer

Im trying to find an eyepiece for a Meade model#114EQ-DH telescope.


Most telescopes use a standard fitting eyepiece with a 1.25 inch outside diameter barrel. You can measure the mount where the eyepiece goes to make sure that yours is this size, then search on eBay or Amazon for "1.25 eyepiece" and you will find many available. Some of these will even be made by Meade, but any make will fit.

The other variable will be the focal length of the eyepiece, which is what determines it's power. The power of the scope will be the focal length of the main objective divided by the focal length of the eyepiece, so a 9mm eyepiece will give a higher magnification (and be dimmer and harder to focus and find objects) than a 20mm eyepiece. It is usual to have two or three different focal length eyepieces for viewing different objects.

You will find a large variation in prices, which is partly due to the difference in quality and type of construction of the eyepieces. Kellner eyepieces are simple and cheap, whereas Possl or orthoscopic ones are more complex and cost more. There are reasons why people will pay more for the better eyepieces.

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1 Answer

Just got a Meade ETX 90 and cannot see anything thru the eyepiece. I've tried the focus screw, lens covers are off, and flip switch is in correct position. Anyone know the answer?


Put the eyepiece with the largest number written on it into the TOP of the scope eyepiece holder.

Practice focusing on a distant object during the daytime. It may take several turns of the focuser know.

Also check the TINY setscrew on the side of the focuser knob. It may be loose and need tightening so it will GRIP the focuser shaft.

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I assembled it without a manual because i cant find one, and i cant seem to work it everything looks good but with the lense i cant quite seem to work it, ...


Put the eyepiece with the largest number written on it into the focuser. DO NOT use the 2x barlow if you have one.

Go outside during the day time and practice focusing on a distant object using the eyepiece mentioned above.

Line up the small finder scope with the main tube-- point the scope at the top of a distant telephone pole or church steeple.

Without moving the scope, line up the cross-hairs in the finder scope with the same object. Once this is lined up you can use the small finder scope to locate objects in the sky.

Read my TIPS on my profile page.

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1 Answer

I also bought one & have no idea how the lenses should work...


Verify that the mirrors are aligned; look through the eyepiece holder (without an eyepiece) and you should see the main mirror with your eye looking back from the center. Ensure that there are no filters on the eyepiece, and use the lowest power one to begin (longest focal length).

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3 Answers

Bushnell 18-1560 Telescope


Hello,
What you have is called a refractor-type telescope with the primary lenses (the Objective) at the top of the tube and the only other lenses in the system are your selection of eyepieces, probably a barlow lens (2X magnification of any eyepiece used), and a diagonal (in line mirror so that you cand see into the telescope from the side.). As the focal lenth of the eyepiece decreases, so does the distance away from the Objective Lens. I believe that you are using the telescope with a diagonal mirror which makes the optical path longer. The fact that your longer focal lenght eyepiece can focus and not your short one would be only if you didn't have the diagonal or the eyepiece all the way in tight to allow the focus mechanism (rack and pinioin) to get compressed enough to focus. Look at the Moon, if the image gets smaller then bigger as you focus, but not sharp, then I would have to tell you that your eyepeice lenses are not in the right order. Someoner may have taken it apart and didn.t put them back in the correct order. The lenese could just be very dirty also. Barrow a short focal lenght eyepice from a friend and see if it works in your system. Then you will know for sure.

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