Attaching finder base to Megrez 88

[haitch]

As the owner of an old Darkstar dob I'm somewhat accustomed to just drilling some more holes in the tube when I acquire a new accessory to go on it so a William Optics Megrez 88FD is something of a culture shock for me (For once I have actually read the instruction booklet).

Anyway it says I should attach the base at point A (currently filled with a grub screw) but I rather fancied attaching it at point B as this is on the rotating section of the focuser and so would align with it when rotated. Does anyone know what hole B is supposed to be for?

Also has anyone attached a Skywatcher type shoe to a WO scope? If so were there any problems? (Just being ultra cautious with my lovely new grab and go scope!)

Thanks for any help:icon_salut:

Realising the font on the photo has turned out to be a little smaller than I thought the one ringed on the left is A and the one on the right is B

[johninderby]

Bothe holes are correct for mounting a finder. You do have to make sure you use the proper short screw though so that you don't foul anything inside.

All you need is a standard Synta type mounting shoe and then drill and countersink one new hole in it about 1/3rd of the way back from the front edge and then it will fit on to point "B" OK.

John

[haitch]

Thanks John... so that grub screw in hole B isn't holding the scope together then?

PS Do you know what the thread is (I notice from the dovetail fixings on the rings that WO like to mix and match imperial and metric sizes!)

[johninderby]

It's a 5mm thread. BTW I have plenty of the 5mm screws if you need one.

Here's a photo of a Synta type shoe mounted on a focuser.

John

PS

The screw in the photo is a bit too long

[haitch]

I'm sure I'll have a suitable screw somewhere. Thanks for the photo - I see it's not a blind hole then! Will have to be careful of the length.

[haitch]

Doh - double post due to dodgy Internet connection.