Considering moving from a Mamiya to Hasselblad setup. Some thoughts and looking for feedback.

Old Gregg said:

Isn't this a good thing though? Fast on-lens [1] focusing on medium format is... a superhuman ability. One of the reasons I sold Fuji GF670 was because precise focusing was a challenge: short throw + poor dampening. The Mamiya 645 Pro is somewhere in the middle, it allows me to TRY and be faster, but I am not sure I actually am, PLUS I get more misfocused shots on it vs the Hasselblad.

IMO, slow focusing is one of the things they nailed here.

[1] I think "on-lens focus" clarification is important here. I haven't tried RB/RZ, but if they focus similarly to C330 (bellows+knob) then it's apples to oranges. Bellows focusing is simply more ergonomic, period. Rotating fat focus rings can't compete with that. I bet Autocord's lever is also pretty sweet.

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It depends on what you're shooting. If it's still life, portraits or landscapes then it likely won't bother you. If you're shooting things that move around (or you are changing your distance) then it is more likely to be irritating, in my experience.

It's also how the ramping of the focus works. Since it's designed as a studio camera the majority of the focus throw is weighted for the minimum focus distance to 15ft or so (90% of the throw is from 2.75ft to 15ft, 10% from 15 infinity). I'm using the modern 80mm lens, it may be different for other focal lengths.

Give one a try and see if you like it first, if you're coming from a rangefinder or something with knob focus like a TLR (or an RZ/RB) it will be quite different. It's got a considerably longer throw than 35mm SLRs and other medium format SLRs that I've used before as well.

Toasty said:

I've used it plenty they are just slower to focus than other cameras. There's a reason they make a little focus handle, you aren't going to get from infinity to minimum focus without repositioning your hand a few times. I'm not the first person to bring this up, it's a common observation.

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With lenses other than AF lenses, I almost automatically prefocus to the range I am going to shoot. Obviously many landscapes are already focused at infinity. I focus with any camera as I am compositing in the view finder, so I do not have a problem with the long through of Hasselblad.

Old Gregg said:

But currently none of my MF cameras (501cm, C330 and 645 Pro Mamiyas) are suitable for shooting anything that moves.

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The C330 worked fine for me for fast moving brides and grooms!
I expect I could have obtained similar results with my 645 Pro. It works well with children at birthday parties!