Question about Tasco Galaxsee 46114375 (375 x 114mm) Telescope

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Focussing I have no manual and cannot seem to find the correct lense to use and get the scope to focus

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  • Anonymous Nov 28, 2008

    I have the same problem and no i want to sell it

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All of Tasco's manuals are on this web site-
http://www.tasco.com/pages/instruction-manuals/

Put the eyepiece with the largest number written on it into the focuser-- do not use the 2x barlow if you have one. Practice focusing with this eyepiece during the day time on a distant object like a telephone pole or a building.


www.telescopeman.org
www.telescopeman.us

Posted on Jul 16, 2011

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It is probably a broken ribbon cable in the lens. It will need to be replaced.

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What is the focussing problem?
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I have a Vivitar Telescope 60x/120x VIV-50600. Once I locate the object with the scope finder and I try to view it through the bigger lens nothing is focused. I have tried using the adjuster and nothing...


The only thing I can think to ask is whether you have fitted an eyepiece (NOT the barlow lens, if it came with one). Eyepieces are small lenses marked with a focal length (in mm, like 20mm or 9mm). They fit into the part that does the focussing, and are held by a small screw that you tighten with your fingers. If you have fitted an eyepiece and it still won't focus then I don't understand what is going on.

I would suggest that this is one of those problems best sorted by an experienced person physically present.

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I cant get focus on the moon with my 100-400mm lense


Many cameras have trouble focussing on something as far away as the moon. Try manual focus. Also, watch your exposure...the moon is brighter than you think.

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I have Cannon A-1 and F-1 Camera bodies, plus all Cannon FD lens. Can I buy a new Cannon digital camera and use a special adapter and use those older FD lens. I would appreciate any reasonable input. JD


No. The only adapters you can get either lose infinity focus or need corrective optics (expensive and reduce image quality) to preserve infinity focussing. The lenses will need to be manually stopped down for metering purposes and the body will only be able to use manual and aperture priority modes.

Also, with modern computer designed optics, using FD lenses on a modern digital SLR is like screwing an old glass bottle on the front and hoping to get sharp images. An exaggeration, perhaps, but you will get significant edge softness and chromatic aberrations and the contrast will be lower than acceptable and truly dreadful with optically corrected adapters.

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The Quantaray 70-300mm lens


Only if you get the version with the built-in autofocus motor. The D3000 lacks a mechanical AF coupling so AF lenses which need to be driven by a motor in the camera body will require manual focussing.

Either way, you're far better manually focussing the Quantaray/Tamron 70-300mm: the AF performance is very slow, very noisy and hunts around a lot to achieve focus.

Although the Quantaray and Tamron versions are identical lenses, if you have to buy this low-quality budget model then go for the Tamron: it's absolutely no better lens quality (and usually the same price), but the manufacturer's warranty from Tamron is much better than Ritz and is internationally valid. If you resell the lens then the Tamron will have some value (not much though) and the Quantaray will be near worthless as it's not so widely known, and has a poor reputation amongst those familiar with the brand.

"Cheap" isn't always the same as "good value"...

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1 Answer

My camera will not focus. I have a 50mm lens and 200mm and neither will focus


Which exact lenses are you trying to use? The N2000 (aka F301) is a manual focus camera so if you're trying to use autofocus lenses you have to focus them manually. Sorry if this seems an insulting suggestion, but you did state "my camera will not focus" and I've learned that on FixYa it's best not to assume any prior level of knowledge with regard to those who post questions.

The next thing to check is whether the viewfinder has an eyecup attached, if so slide it upwards to remove it as sometimes they have a corrective lens fitted if the previous user needed corrective optics. If your vision is fine (with glasses/contact lenses if necessary) then a corrective lens on the viewfinder may make things look blurry.

Other than that, the only other possible cause (other than a pair of broken lenses) is if the focussing screen has become dislodged downwards (or somehow fitted upside-down) then the viewfinder image will be unsharp. Officially the F301/N2000 had a fixed focussing screen but it could be replaced with one of three designed for the higher specified F501 (which does have autofocus), and if not seated correctly you'd get the focussing issue you describe.

You can test if the focussing screen is the problem in one of two ways:-
1. A visual inspection (you may need to get a more experienced photographer to take a look at it);

2. Set the lens to focus at infinity and at the widest possible aperture and take a photograph of a distant object (ignoring the blurred viewfinder). process the film and inspect the photo. If it's sharp then you have a focussing screen problem. If not, then it's a lens problem.

If the problem is a poorly fitted focussing screen then it may just need reseating or to be removed and refitted. It's vital to do this in a dust free environment and to avoid getting fingerprints on the screen. Some screens sit in a hinged frame which then clips into place when pushed up, others push into a pair of clips towards the top rear and then the front is held in place by a spring clip: it's been a long while since I worked on the F501 or F301 so I don't recall which system is used.

Courtesy of Norman Butkus' website, click here for a free Nikon N2000 user manual.

I hope that you've found my answer to be of use, if so please return the favour by rating my answer.

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In low light situations, connect a speedlite flash to your body (e.g. 430EXII or 580EXII). These flashes emit a AF assist beam to assist focussing in low light situations.

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Dear Mickmart,
One scerw fit on knob is come out.Go to good hardeware fhop and buy a new screw.Your focusing knob in now ready to work.

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