Originally posted by Bob from Aus Is it bending in the middle? I am bit jealous you have so many auto tubes
Yeah, I'm pretty sure there was a little flex in the middle. That's partially why the picture of the setup was just a quick snapshot as I was worried about leaving the K-5 hanging out on the end for too long.
Three of the tubes are 2x TCs (with contacts) and the glass knocked out. One of them has PZ-AF contacts which actually allows for pretty decent AF as well (
see this thread). They each were about $20-40, depending on how cheap I could find the TC. The ones with contacts but not AF are generally the least expensive and the ones with the Pz-AF contacts are generally the most expensive.
The other three tubes are a set of 12/20/36mm tubes AT-23 type tubes.