This is an old photo I have on file - not a perfect dimension because of parallax error but close.

I can dig one out tomorrow and measure more accurately if you want?



It took me a few attempts to get the picture to display - apologies to anyone who was looking in real time.

Ray

email (option): rays54@hotmail.com

love ya work Ray.thanks for posting the photo.. 35mm or 1"3/8 close enough for me..
cheers

email (option): wandins@bigpond.net.au