1.25" Crayford focuser

Does anyone sell a 1.25" Crayford focuser besides Jim's Mobile? The JMI
models have a fixed base radius that does not match my scope and they won't
machine a custom curve. All I really want is the usual universal fit base.

Del Johnson

Does anyone sell a 1.25" Crayford focuser besides Jim's Mobile? The JMI
models have a fixed base radius that does not match my scope and they won't
machine a custom curve. All I really want is the usual universal fit base.

Del Johnson

I bought a 1.25" RCF kit from JMI. The RCF has a formed plate for a base. They
asked, and adjusted the base to match my scope.



john

You're right, and it's a shame their "minimum" size is a 5" radius. I had
one of their 1-1/4" focusers with, I think, a 10" radius for my 6"
reflector, and I had to "pull it tight" with the 4 mounting screws and the
leveling screws. Of course, since the base does not fit flush with the tube,
you have to be very vigilant about how you adjust the leveling screws. I
have the same problem with the 2" RCF focuser.

Howard Lester



"Del Johnson" wrote

Thanks. I asked JMI about the mini-2 NGF focuser but they really were not
interested in altering the base for me. I am trying to get something to
fit
a 6-inch reflector, but their focuser is designed for a 10-inch tube. You
would think that a 1.25" focuser would be designed for a smaller
telescope.

Del Johnson

Del,

Take a look at this one, it's a helical crayford...

http://www.kineoptics.com/HC-1.html

It works great, I have the 2 inch model.

Jerry