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The problem is after you make the locking knob tight with your left but not tight enough yet so you can move the focus knob with the right hand, you then hold the loupe with your left hand. Then make the final adjustment with the right hand. Let go of the loupe and use your left hand to make the final tighten. The problem then is the possibility that locking it may have moved the focus. Since you're no longer looking through the loupe there's no way of knowing. You can look again, but if it shifts ever so slightly you won't see the slight change, and now you're locked tight.
I suppose I could forget about the last locking action and leave it with the last focus with the loupe and hope it holds for the shot.
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Have you ever seen an indication of misfocusing on your negatives? I guess if you’re really worried you could tape a small laser range meter and measure any potential shifts when following your standard process (I mean in a controlled environment like at home, eg. focusing on some object right in front of a wall and pointing the laser at the wall behind it). That would also tell you for example how much things move when you insert the film holder. You may be surprised.
In the field you could also shoot the same scene twice, one with and one without the last locking action and see if you see a difference.
If the adjustment knob did not turn while tightening the other knob, then the standard did not move and focus is preserved. And always double check after tightnening -- no reason to just hope.
I suggest practicing a score or two times -- set the camera up, with or without lens. Set the standard at one of the marks on the scale on the camera using the adjustment knob, and then tighten it with the other knob. Check that the standard is still at the same mark. Do it until you can always keep it at the same mark...then out in the field you'll not have to worry about it.
"Landscapes exist in the material world yet soar in the realms of the spirit..." Tsung Ping, 5th Century China
I believe the problem is it can move when you locked it tightly after making the final adjustment. You want to hold the right focus knob too to prevent drift. So you have to drop the loupe so you don't know if it's shifted. I'll have to play with it and come up with a good solution. But I find it's a nuisance and poor design for any human without three arms.
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That's why you keep a hand on the adjustment knob -- so you know it does not move when you tighten the focus down and there is no focus movement. One might give the adjustment knob a little counter-rotational force to counter the force placed on the other knob if that helps. I do not even look at the GG when I tighten the focus down. Good luck figuring the best way to work for you.
"Landscapes exist in the material world yet soar in the realms of the spirit..." Tsung Ping, 5th Century China
I'm not sure what you guys are even talking about anymore. Sounds complicated.
Don't worry about it too much-- it's an unusual issue for a specific model of camera that for basic use, shouldn't be a problem. IF you have a heavy lens, and IF you have the base board angled downwards, then you MIGHT need two hands to adjust focus. But only on the 45H1. The 45N-2 and 45F-2 don't have this issue at all, since they use a screw-drive mechanism for focusing.
Even on the H1, I think Vaughn's got it right, and all Alan needs to do is monitor the movement of the knob he used to adjust focus with in the first place.
I considered the H1 (and was going to buy it at first), but on reflection, decided I'd rather have the lightness and flexibility of the 45-N1(c). I would have bought an N2 happily, but they were out of stock at the time.
As for crown/speed graphics, they're great little cameras, but as a novice, my concern was having to learn a new style of camera, AND deal with any potential issues a used camera might come with. Buying new, with good customer support, seemed like the right approach.
While I agree that the H1 is quicker to set up and put away, raising and lowering the standard is a 10-15 second task each way. Having a lens always on the camera means I've got a 1 in 4 chance of having the right lens on the camera at any time-- or worse, that because I'm being hasty / lazy, I don't bother putting the *right* lens on the camera, and do it half-fast.
If it's in your budget, consider the 45N-2 or 45F-2. You won't regret either. Also, the burgundy bellows looks fantastic.
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