Provided your camera is supported with a sturdy L-bracket, there is absolutely no need to have a tripod mount on the CV 125 itself. Besides, the lens is neither long nor heavy enough to warrant such support anyway.
Your comment makes me wonder if your tripod is up to the task.
My tripod is as good as it gets.
Your comments make me wonder about your subject matter (inanimate objects) versus animals ...
I have an L-bracket, and these let you do perfectly-horizontal, and perfecetly-vertical, compositions ... but what about angles that are
inbetween perfectly-vertical and perfectly-horizontal
It's not just "the weight" which warrants a tripod-collar, it's
the infinite-rotated positions, instantly available, that a tripod collar lets you achieve.
If I see a butterfly in a cockeyed, 35° position on a bent piece of grass ... neither perfectly-vertical, nor perfectly-horizontal, positions are going to get me what I want.
Worse, if my subject is highly-agitated, it may fly away in a second or two, so I don't have all day to pluck my camera off the tripod, flip it vertically, reattach, and re-compose my shot (with an L-bracket).
A tripod collar allows me to re-compose in a fraction of a second, compared to a cumbersome L-bracket, and I don't make a bunch of hand-movements either, which can scare away flighty subjects, which gives me no image at all.
As to the 200/4 ED-IF vs 125 CV: the 200 certainly is sharp, but lacks the wonderful bokeh quality of the 125. Plus the chromatic correction of the 125 is better as indicated by its being an APO lens.
Thanks for the perspective.
The 200/4 Micro IF (non-ED) wins only on its buttery smooth focusing and long working distance vs the 125 CV. Optically speaking it is no match at all. But still sharp enough for most purposes provided you do a CA removal in the RAW processing work flow.
Again, much appreciated, thank you.
I can live without the AF of the V-125 and can deal with the lack of reach also, because I really do enjoy its image quality.
However, the lack of a tripod collar is one thing I do miss immensely.
Again, it's not the "weight" of the lens, it's the
positioning of it, composition-wise, immediately, that makes it so valuable on a wildlife macro lens.
If the V-125 had a tripod collar, it would be perfect IMO.