Clamshell PIggyback

The clamshell on my FS-128 has a threaded stud protruding from its top that is obviously designed for piggybacking some other types of equipment. Have you used it? If so, for what and how?

Allen

Allen,

It's a screw for mounting a DSLR camera--most any camera has that socket on the base--or other devices with a 1/4-20 socket which is the standard size.

Dan

I use two clamshells and mounted losmandy dovetail adapters to the top of them.
Then I mount a losmandy DUP to the dovetails. This carries the guide scope.
(My current guidescope has losmandy rings mounted directly to a DUP which then
fits to the DAs. Fwiw, I think a better setup is to just mount another
dovetail saddle to the top of the clamshells.)

Here's the setup... Note that I took out the existing bolts and used
new 1/4-20s.



and... here's ways I've had the guidescope mounted to the DAs...

With the guide camera mounted on the DAs using another
pair of DAs on losmandy rings; there's a losmandy male-male between
the imaging OTA and the guide scope...


Here's another picture with a 80mm f11 guidescope bolted directly
to the losmandy DUP.