Question about Vivitar (1607225) Telescope

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Can not figure out if focusing knob is working. It seems like it is slipping

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Does the tube extend and contract-- get longer and shorter-- ???

Then it is working just fine. If nothing happens when you turn the focus knob then it's broken. Sorry to say but it would be too expensive to replace. About the cheapest focuser will cost about 30-40 dollars.

Posted on Jul 15, 2010

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Posted on Jan 02, 2017

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How to fix when rotating the fine focus knob until it reach the limit of motion and the coarse focus knob get stuck and can only move in very small range.


Based on the fact its a E600 i would suggest to have a engineer look at it : prices range from £120 dependant on your location if you visit www.ukmicroscopy.co.uk they will be able to help

Jan 30, 2014 | Nikon Eclipse E600-fn Microscope Polarizer...

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Kodak carousel 760h projector


Neither of the "trademarks" you mention were used by Kodak, so the lens must be a non-Kodak lens. First of all, remove the lens and look along its side - it should have a rectangular "rack" (dimensions of the "rack" are roughly 1/2 inch by 3 1/4 inches) with gear teeth that will connect with the corresponding gear (inside the projector) on the focus knob shaft. If the lens does not have this "rack", then you should try to find a lens that does. (One source for lenses is www.VineValleyImaging.com). Verify that the lens is on the focus knob shaft and does not appear to be damaged. If the gear on the focus shaft is damaged (or slipping) you will need to contact a Authorized Repair Dealer to see if parts are still available for your specific model. Let me know if you need anything else! Good Luck !! Jim

Oct 25, 2011 | Kodak Carousel 4600 Slide Projector

1 Answer

I culmated my telescope and cant' get it to focus in. Using the focuser the image stays one big blob without any distinguishing figures.


Did you put an EYEPIECE into the focuser? Probably NOT.

Take the scope out in the day time, put the eyepiece with the largest number written on it into the focuser. Practice focusing on a distant object. TURN the focuser knob slowly until the object comes into sharp focus.

Sep 15, 2010 | Orion SkyQuest XT6 Classic Dobsonian (354...

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Focus Lense Will Not move using the remote or the dial - What can I do? Kodak Carosel model 750H


The KODAK Carousel 750H was manufactured from roughly 1971 to 1981.
If you can push the focus knob toward the outside of the projector and manually remove the lens, then the problem is the gear on the focus shaft (the shaft the focus knob turns). The gear has either cracked and fallen off or is cracked and slipping on the shaft. Either way, the focus shaft needs to be replaced by a factory-trained repair technician.

Jul 08, 2010 | Kodak Carousel 4400 Slide Projector

1 Answer

Oil leak


you must have the engine cleaned (externally), after that you may figure where the oil is coming from. Also it sounds like your transmission is slipping, check the transmission oil level and make sure the oil leak isnt coming from the transmission. Driving the vehicle with slipping trans will cause severe damage. Hopefully this helps!!

Mar 31, 2010 | 2001 Ford Focus

1 Answer

LX10 won't come into focus. I'm not talking about blurry stars-it won't focus at all.


The focus knob connects to a small "rod" attached to the mirror housing. The rod may have slipped out of the small hole in the end of the focuser (inside).

Remove the focuser and reattach the "rod".

Jul 12, 2009 | Meade Optics

1 Answer

Door knob will not stay set. Keeps slipping out.


i would say the only fix for it is a replacement.sounds like its wore out, sorry

Jul 11, 2009 | Kwikset Sheridan Handle Set

1 Answer

Focus knob problem


have repaired a few of these ...some whells have tiny set screws to tighten, some are a two piece wheel that loosens up sometimes, if not that then it is broken. if i can be of further help...15088331232

Apr 26, 2009 | Optics

4 Answers

Can't focus my telescope


If there is nothing on the objective lenses or eyepiece lenses then it most likely needs collimation. This is where you adjust the secondary mirror while viewing an out of focus star. You need stable sky conditions to do this.

There are most likely three small screws at the front of the telescope and these are what you use to adjust it. As one screw is loosened then another is tightened. Do this in very small increments. If you have your manual it should outline how to perform this. If not go to this web site: http://www.astrosurf.com/legault/collim.html. It will show examples of how objects look both in and out of collimation. There is a section further down the page for SCTs.

A very handy tool for this is to replace your screws with Bob's Knobs (http://www.bobsknobs.com/) . These replace the screws and allow you to adjust it by hand instead of a screwdriver.

The other focusing problem I've experience with my Celestron SCT is to have the focus knob loosen up and then slip as I turned it so that I could never focus with it.

Good luck and clear skies!

-jodair

Mar 29, 2009 | Meade Optics

1 Answer

Russian Lomo (Biolam?) old monocular-coarse focus wheel slippage


The right hand shaft knob contains the coarse focus locking clutch adjustment mechanisim( big name-simple design). This solution applies if you have the model with the fine adjustment wheel mounted in the base and may or may not apply if your fine focus is in the left-hand knob.

Inside the right hand knob ( as viewed from the rear of the scope) is a threaded disk/nut which has two pins (Slightly and for reasons I don't understand: they are offset vertically, they have different pin diameters and different pin lengths) In theory, they lock into the bushing within the knob proper to keep tension on the clutches while keeping the knob from falling off.

The repair can proceed in two ways depending on if the disk/nut has totally been unscrewed from the focus shaft.

Gently pull the left knob and as you do turn it slowly to see if the pins reseat. If they do you'll feel a slight lurch outward of the knob. Hold gentle outward tension( so as the pins remain seated) as you turn the knob clockwise until the slippage in the clutches is so lessened that your knob is firm and the focus adjustment is operating to your liking.

IF that didn't work it is likely that the threaded disk/nut has come off the shaft and will need to be reset and screwed back down. The disk is easily cross threaded and you'll need tweasers or micro plyers or a hemostat and/or a flat headed finishing nail. Plus I recommend a small bottle of LOC-TITE(tm) semi-solid thread sealer--NOT the kind that freezes the threads

As you unscrew the knob counter clockwise pull on the knob to slid it off the shaft it should come off in your hand revealing about 6-8 washers on the shaft. These are the clutches so be careful not to loose them.

The knob should have a slight rattle and that is the disk nut. To get to the disk/nut put a small finishing nail head first into the shaft whole and push to release the plastic knob insert cover out being careful to not loose the disk/nut.

To clean the threads and insure an easier repair screw the disk onto the focus shaft to insure the threads are clean.

This next part works better with the scope lying on its left side.

This part is optional but not necessary to get the scope back in operation. Place a tiny amount of LOC-TITE thread sealer on the shaft threads. This will make the knob clutch adjustment more stiff but will also reduce the likelihood that the knob will be adjusted out too far again. The loosening occurs when the knob is turned before the operator realizes the pinion gear limit has been reached or by someone who dosen't understand correct opperation of the focusing assembly.. So long as the clutches are engaged the and there is no slack in tension the disk/nut shouldn't come off the shaft again.

Observe the pins in the disk/nut and match them up with the holes in the aluminium/brass knob bushing. You'll have to wiggle the disk around to get it reseated properly. Once you do, hold the disk firmly against the bushing to keep the pins seated as you put the knob back over the shaft, pushing it all the way down against the shaft.(The clutches are springy so don't worry about it locking in place just now).

You may prefer to hold the disk/nut and knob firmly with a finger and spin the left hand knob counter-closkwise for easier threading of the nut but remember this will also move the focus arm. Not a problem if you start with the focus in the range centered.

If using the right knob: Turn the knob clockwise feeling for the threaded shaft maiting back up with the threads. IF it cross-threads, back it off try again. Once the threads are engaged keep the outward tension on the knob so the pins don't slip out. When you/ve screwed it down far enough, the clutches will take up the slack and keep the knob from slipping away from the disk/nut. You'll know the clutches are engaged when the focus shaft turns.

If you are happy with the repair slip the knob cover back on and snap in place. It if falls out place a little of the thread sealer on the rim and try again.

If you like this solution it took me an hour to write it up. Please consider volunteering an hour with a local non profit. I support the American Red Cross, Habitat for Humanity and the USO.
Regards



Mar 27, 2009 | Lomo Science & Laboratory

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