[Screwdriverone (Chris)]

Hi All,

I have researched and it seems for me to use my MPCC on the front of the Atik 314L+, the optimal distance between the MPCC back end and the CCD plane is 55mm.

Question is, where can I get a cheapish M42 x 0.75mm 50-55mm long Extension tube with male threads on one end and female on the other? I dont want to have to buy the full extension tube set as I already have the MPCC, I just need a 50mm spacing tube or combination of smaller ones to achieve optimum separation to use the coma corrector properly and hopefully reduce some vignetting.

Any ideas where I can get something suitable?

Thanks

Chris