Vertical alignment of image on Canon IS 10*30 binoculars
Presumably the binoculars have been jolted and I see on another posting to which poolseman replied that a (seemingly) simple adjustment can be done. Can you please tell me how to access the adjustment screw.
Re: vertical alignment of image on Canon IS 10*30...
More than likely one or more optics have shifted, its hard to tell if it can even be fixed as some of the mass produced binoculars today are impossible to get apart without taking off the outside leather or rubber. you dont want to mess with it cause it will only get worse, and probably you will get dust etc. inside if you get it apart. if i can be of any further help contact me....firstname.lastname@example.org
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generally under the edges of the covering at the eyepiece end there are tiny screws that are used to adjust the prisms in the binoculars, generally out of alignment issues are caused by the prisms being out of alignment.
The oculars are not aligned properly causing double vision. Check on the binoculars to see if there is a place to adjust the alignment of either of the oculars. Look for any loose screws that may cause the two oculars to be out of alignment.
If this is not the case try adding some torque to the binoculars to see if the will adjust to where they will both point in the same direction. The eyes can fuse disparate images slightly but there is a very small range that they can handle. If the two images are separated by more than this small amount it will cause eye strain and double vision.
This is a common problem with binoculars. One of the prisms has shifted and the two sides are therefore no longer in optical alignment (collimation). Unfortunately, fixing this requires a degree of expertise, which may cost more than you will want to spend. I have often taken old binoculars apart or found external adjustments that allowed me to realign them, but I have ruined a few pair this way. Not a good idea if they are valuable.
If you can find the paperwork and they are still in warranty, you might try to get Canon to repair them, but I suspect that they will say they have suffered an accident, not a manufacturing fault.
Your binoculars are out of collimation. That means that the optical path needs to be aligned. Binoculars are designed so that the focus point of each barrel is the same over long and as short as possible distances. Binoculars that are properly aligned will still show a double image if you attempt to focus at something close that is too close for the models design. However this is not the same for long distances. The image at a long distance must not be doubled.
If they are under warranty and you haven't damaged them by dropping etc send them for repair to the manufacturer or ask the retailer where to send them.
If you are going to pay to have them fixed get a quote first. Binoculars that are of the zoom variety are not well thought of among binocular officionados as the quality of image degrades at higher magnification. For the price of repair you may be able to source a higher quality non zoom binocular.
Your alignment is out in the vertical. There are two prisms on each side and you want to adjust the lower ( on the right side ) prism so that you correct the image in the vertical dimension.
Caution : it doesn't follow that just because the image seems to be out on the right hand side that it is the right side that fas to be adjusted. So be prepared to adjust the other side. Also the best is to adjust little bit on each side until alignment comes right.