Broken Finder

Ask your fellow astronomers to solve your telescope queries

Broken Finder

Postby madmartian » Wed Dec 21, 2005 2:13 pm

I have got a finder for my 60mm refractor whose "crosshairs" are broken. Can anyone suggest a good way to have it fixed?
madmartian
 
Posts: 70
Joined: Mon Feb 13, 2012 6:20 pm

RE: Broken Finder

Postby haitch » Mon Mar 17, 2008 11:13 am

In my finder, when you unscrew the body at the eyepiece end (I always have to mess), the wires just look like fuse wire held in by a screw down ring.

If yours is the same it should be fairly simple to unscrew and put a piece of fusewire in to replace the broken piece.

Do it at your own risk though!!!

Hope that is of some help.

[image]local://2898/94FA065BDEF24F00B647299F396060D9.jpg[/image]
haitch
 
Posts: 14
Joined: Mon Feb 13, 2012 6:47 pm

RE: Broken Finder

Postby haitch » Mon Mar 17, 2008 1:10 pm

That's done it now...

I always thought the crosshairs in my finder weren't fine enough so this has urged me to fix that.

I've undone the ring and can confirm that, in mine at least, the crosshairs are 2 very fine wires simply glued to the back of it.

Dead simple to replace with fine wire thread and a tube of superglue. Just got to find something finer (the current stuff is already finer than 5 amp fuse wire - I've just held it next to it). Maybe I could get some very fine green thread to make it more visible too?!?!

Good luck with yours Madmartian!

haitch
 
Posts: 14
Joined: Mon Feb 13, 2012 6:47 pm

RE: Broken Finder

Postby haitch » Mon Mar 17, 2008 1:43 pm

Dog hair!

I think my dog might be the 1st ever to become incorporated in a telescope. Great stuff - with a moulty dog like mine I can even sift through to find really fine ones.

Unfortunately the superglue doesn't stick to the hair well enough to keep it taught so they didn't form a perfect cross (would probably work ok on metal wire). I just need to find a tackier glue. Evostick or something similar should do it.

I'll post again when I've cracked it
haitch
 
Posts: 14
Joined: Mon Feb 13, 2012 6:47 pm

RE: Broken Finder

Postby thething » Mon Mar 17, 2008 5:53 pm

There is a substance called 'Sticks like S***' (no word of a lie. And apologies for using profanities on the site). That should do it if you can get hold of some.
thething
 
Posts: 781
Joined: Mon Feb 13, 2012 6:20 pm

RE: Broken Finder

Postby haitch » Mon Mar 17, 2008 6:10 pm

Thanks for the thought TheThing but isn't that stuff similar to liquid nails (but stronger)? I could be wrong though. I need something very fine and delicate for this job.

I think I'm moving on from the hair idea now. I'm going to see what's the finest fishing line I can get. The idea being that, as it's opaque, it might catch a bit of the light entering the finder making it more visible.

Regards
haitch
 
Posts: 14
Joined: Mon Feb 13, 2012 6:47 pm

RE: Broken Finder

Postby andrew shields » Mon Mar 17, 2008 6:43 pm

try cheap paintbrush bristlses for the finder crosshairs they are made of plastic so the glue should stick to them and they are the same thickness as hair.
andrew shields
 
Posts: 408
Joined: Mon Feb 13, 2012 6:42 pm

RE: Broken Finder

Postby sftonkin » Mon Mar 17, 2008 7:50 pm

Hair, fuse-wire, etc are much too thick. Hot-melt glue is the the best I found -- you know that irritating tendency it has to string..? -- here, at last, is a use for it. If you don't have hot-melt, try pulling a strand out of dental floss, and epoxy (or CA) that in place.
sftonkin
 
Posts: 2826
Joined: Mon Feb 13, 2012 6:22 pm

RE: Broken Finder

Postby kev102 » Tue Mar 18, 2008 6:53 pm

spiders web works a treat.....kev
kev102
 
Posts: 218
Joined: Mon Feb 13, 2012 6:45 pm

RE: Broken Finder

Postby thething » Tue Mar 18, 2008 7:26 pm

[quote]ORIGINAL: KEV102

spiders web works a treat.....kev
[/quote]

If you can get there before the long-tailed tits, who are collecting as many as 300 each to line their nests, tis time of year!
thething
 
Posts: 781
Joined: Mon Feb 13, 2012 6:20 pm

Next

Return to Equipment Advice

Who is online

Users browsing this forum: No registered users and 3 guests