Given to Fly
Lee - "arbitrary" also means 'discretionary' which means 'non-mandatory', and this fits the decision Zeiss has taken.Hi CJ
As Gijs says, you give a succinct description of SF although your use of the word arbitrary to describe the hand position is really puzzling. 'Arbitrary' means based on random choice or personal whim, .....
The focuser and bridges could be moved either forward or back within a narrow range - mm's/cm's. This obviously has follow on effects on the mechanism design and housing too.
Too far forward and the moment of force of the bins tipping backwards becomes much stronger, and the hands are forced even further forward thus loading up the shoulders even more.
Move it backwards, and it reduces the rearward bias, perhaps even eventually cancelling it out - or certainly starts to run into contact with larger noses.
The bridge could even be reversed, and a more curvolicious Zen type used - that would be quite nice, and achieve the benefits without the drawbacks ..... though resting fingers on the bridge may not be everyone's cup of tea, it does seem that quite a few folk here do precisely that. :cat:
So you see, it's a balance Obviously the Zeiss design team have made the decision to have it where it is to produce a certain amount of rearward bias force. Sure they would have calculations and readings in N.m , and perhaps even a sensitivity analysis with respect to angle of elevation, but ultimately the decision would have been made that this feels pretty good for the majority of users.
There's no free lunch though, and employing gravity to make it 'feel' lighter also loads the shoulders more. For me that results in early onset fatigue of the tiny shoulder muscles and introduces some extra vibration movement to the view. I'm 'lucky' these days that 2 ruptured spinal discs means that I rarely think about my dodgy shoulder anymore ! Other people with repetitive strain type injuries would also experience shooting pains up the back of the neck - and that's no fun.
No doubt the SF suits 'most' people though - just as it's optical distortion profile has no meaningful deleterious globe effect for 'most' people. The efforts to shift the game on are to be applauded. I look forward to the SF2.0 where a whole host of little improvements that I've mentioned possible over the years are made .......
This little blast from the past clip shows some of the 'complications' that come with 'free stuff' lol 3