Cfraz - Ahah! That's the explanation I've been needing, thanks. With DSLRs F/B can work with AF lenses, not with all-manual lenses. But - as you and others say - why not add it to the bracketing functions the camera already has?
Southlander - Yes, I think the 2x TC is pushing the friendship a bit much. But, so far, it's the only one I have - so, just playing around with it to see what it does and doesn't do. While the stop-down metering on the Tak 55mm by itself gets surprisingly close - with the 2x TC on - oops,
waaay off, overexposing... When the new M42 adapter arrived yesterday, I only had time for a bit of a play - then with the 2x on, a few shots out the front window to the other side of the road.
I was really expecting a blurred mess - but it seems that with more experience, it might not be quite that bad. The image below is the "least awful" of the dozen shots I did. JPEG only - RAW might be more "repairable", though. Early days - but at least it's showing me what's happening.
I'm thinking that a 1.4x or even a 1.7x TC would be "less lost" and so actually more usable - at least for "snaps".
- Yes, all over, like a mad-dog's brekky - that's about the 8th I did with the 2x TC... The last 3 were blown-out only slightly higher than airliner cruise altitude....
There again - c'mon, admit it - you guys needed a laugh....!
Regards, Dave.