Double vision.

[Highflight]

Hi All.

I recently had a problem with my 25x100 big bins when they started giving me double vision. I thought it was the collimation that had somehow slipped or miss aligned. I kept seeing two of everything, so I had them re-collimated by a reputable repairer, reccomended by Telescope House. I have just received them back but there is absolutely no difference. I still see two of everything. Do bins have to adjust to temperature the same as scopes before using them, or is there a problem with my bins? Can someone help please.

Thanks.

Chris.

[RoadRunner2009]

Hi Chris,

Double vision is usually caused by improper alignment of the Objective lens, they are either pointing too much inward/outward hence giving you double vision (like when you cross your eyes).

Have your binos been dropped or knocked? Something must have moved them out of alignment!

RR

[Highflight]

Hi RR.

Yes, they were knocked, but that was the reason for having them collimated, but when they came back there was absolutely no difference.

Chris.

[Jeremy]

Double-vision on binos is definately collimation.

Telephone Telescope House and explain that their "alignment" appears not to have been carried out at all, and discuss what they way forward should be.