JR1 wrote:
I know of no bellows that has or do offer "auto"
If you are unable to remove the lens I can only guess that the "pin" used in the bellows same as the camera body may have jammed.
I have no ideas but I would advise ANYONE these days from using bellows, proper tubes are best
OMG $49, cheap sorry but you tend to get what you pay for.
There must be a lens release "button" on the camera body so there must be one on the lens end of the bellows
Actually they do make a set of auto bellows but they are right at $1000.00 dollars Adorama sells the they are made by Novoflex. But $49.00 is about median price for a set of manual bellows so not really cheap about what they are selling for.
Looks like the same release that is on most cheap ext. tubes and they can be aggravating just fiddle with it should be spring loaded and you should be pushing it towards the camera end of the bellows and if the little thumb screw that is the release is loose it will not release the pin all the way.