Extension Tube – all metal, very solid and, judging by the tattered cardboard box, well used and fairly old. I guess ‘Formula 5’ is the brand but there’s no mention of it anywhere.
End threads - inside diameter 36mm, o/s 42mm. No glass. Gravity (free-moving, unsprung) contact pin/rod in each segment for Automation info to the camera.
Anyone know of it and does it require mounts to the camera and lens or is it specifically for a thread-mount camera? It’s for my Pentax DSLR, K10D
I’m itching to get into some Macro as soon as I have my focus problems sorted. And that oughta be soon.
Last edited by Mike Gallagher; 09-14-2014 at 07:26 PM.
Reason: added word