Checking vial levels. Remember the error seen when the vial is reversed is double the actual leveling error. Correct only half the error you see and recheck. A few iterations will get the vial very close.
I have circular spirit levels on both front and rear standards - would that still hold good?
I have tried to adjust earlier, but the 0s hold on both standards' tilt and shifts and I am still not able to get them in the center.
Is there any particular standard I should first try to level out?
Don't worry about the levels, they're of limited value. For architectural work, they're useless - use a gridded groundglass. My 4x5 has a round bubble level, which is accurate, but I've never used it. My 8x10 has no levels and I've never missed them.
Just get the levels as close as you can with shims, use them as a guide to get the camera close to plumb and level - the final arbiter is the GG anyway. You only get a flat and level horizon at sea, anyway.
As I posted, "Just get the levels as close as you can with shims..."
Those little round bubble levels are useless for precision leveling anyway, I don't know why people obsess so over them.
Got it. So something like this, or much closer in the inner circle?
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Hm, okay. I will see if there's an alternate spirit level available here, or else I'll just see what it comes up with. I suppose this probably wouldn't even matter for table top photography. Maybe just architectural then?
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I agree with E. The camera should be reasonably level/plumb with itself, and you should indeed use the levels on the camera and tripod to get yourself to a decent starting point, but it's what's on the ground glass that counts, as that's what the film will see. Obsess over that -- not over the preliminary set-up.
Not even a tiny little bit. As for architecture, if you are photographing buildings which are perfectly plumb and level,
I noticed the other day (on my OmegaView 45D) that I could get the top bubbles level, but then I spun it around 90 degrees on the tripod head pan and it was off (I've got the upside-down A-S Monoball P0, pan on top of ballhead).
Turns out that there's some sideways-play in the clamp that clamps twixt the tripod head and the rail.
Easiest way to calibrate is to set all the standards to default, no shift/tilt/swing. Take the camera off and level the tripod head (I've got a circular-bubble on my A-S clamp). Put the camera on and then level the top bubbles using aforementioned clamp. Now I know that the top bubbles are square and true to the tripod-head bubble (at least, until I move that clamp or change rails).
New construction is of course quite a bit better but not perfect. Some old buildings are so out of plumb and level it's ridiculous.
Actually I should have mentioned this before. My heavy tripod (for 8x10) has two tiny tubular levels at right angles, and I do use these to get the head of the tripod reasonably level when setting up - this can make a difference with a heavy camera on a ball bearing pan head meant for a newsreel camera. It's just about the only time I do use a level of any sort, for all I know the one on my 4x5 has dried up.
Before pointing the finger at the Toyo, consider that spirit levels, especially oil-filled, are not infallible to error. If you have rubbed (or somebody else has) the spirit levels with a cloth, they will be electrostatically charged and will resist centering (e.g. they'll rush to left or right but won't centre, or be slightly off centre even when everything appears correct). Use an Ilford antistatic cloth or spray to de-charge the levels. I have done this on everything from builder's levels to trailer-beam bullseye levels and it does work. It has also been done on Linhof Master Tek. cameras. Today the same trick has been applied to one of three levels on my Manfrotto 498RC4 ballhead.
Haha.
How does one measure btw? Does that old weight tied to string thing work best?
Btw wouldn't successive road-work mean that buildings are out-of-whack because of that? Or maybe moved because of the ground beneath them shifting, ever so lightly?
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I'm just joking around with E. here.
Yes, plumb bobs work fine and so did my tape measures, stick rule and levels. Yes, a lot of old buildings have settled over the years, some even to the point of having to be torn down. My house was built in the late 1920's. When I layed tile in the kitchen and hallway I found every wall was out. It took me half an hour of measuring so it would come out looking right. We do have a very unusual shaped kitchen.
New construction is much, much better but of course nothing is absolutely perfect. Watchmaking precision is not necessary and cost prohibitive.
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