Collimating Screw Size

[Tribal-Wolf]

Can someone tell me the thread for the six primary collimating screws?

There are 3 allen grub screws and 3 counter sunk Phillips head screws.

[DOBBY]

six collimating screws ? I've got 3 locking nuts & 3 (1inch) large headed adjusters on my primary

[jimmyjamjoejoe]

I've been trying to find this out for ages.

[Tinker1947]

Can you post a piccy, don't sound right....

[jimmyjamjoejoe]

Sounds right to me, 3 phillips head collimation screws, 3 small allen head grubs for the locking screws on my 200p.

(image pinched from astrobabys site)

[Tribal-Wolf]

Sounds right to me, 3 phillips head collimation screws, 3 small allen head grubs for the locking screws on my 200p.

(image pinched from astrobabys site)

Yup, that's them

[jimmyjamjoejoe]

Could just measure them i guess, but that'd mean taking them out etc and i'm lazy... Maybe a job for a cloudy night. Generally, when screws are metric, the width of the widest part of the thread will give the M number. Eg. a screw that's 4mm wide edge to edge on the thread will be M4.

I know the grubs on the secondary are M4, so i'd imagine those are the same on the primary, will just have to check the collimation screws.