Align ED80, EFW and ASI1600MMC

jbrazio

Hi, I have bought an EFW8 and and ASI1600MMC, when I try to keep the optical path all aligned it seems impossible even using the provided washers/spacers (~1.5mm).

I use a Skywatcher's field flattener 0.85x with the ED80.

My optical path is:

ASI1600MMC + EFW + M42-42 adapter + T2 11mm + M42-48 16.5mm + FF0.85x + ED80

Sam@ZWO

you may need more thin spacer to align it

jbrazio

But using shims will affect the optimal optical path length of 55mm from the CMOS to the FF.

Some allow the mechanical rotation using grub screws, this is not possible with the ASI1600 ?

Where can I get more shims ?

Thanks.