Hello everyone,
I m still Learning the LF so please help me with this issue,
To set the correct (optimum) plain of focus, is it correct to focus on far, then focus on near, then bring the focus down to about the top third of the Ground Glass. I found that this theory is the same as the usual 35mm technique. Can this be true?
I have a Sinar F2 system.
Thanks.
Be very careful moving the front lens standard to control focus. The image circle of the lens will get used up considerably faster than when using the rear standard...
?????
I believe Steve is talking about tilting/swinging the front standard as opposed to tilting/swinging the back. Excessive tilt and/or swing on the front standard will throw the image circle off the film. Tilting or swinging the back standard doesn't do that in the same way.
Lee
That makes sense. As far as horizontal movement, there is no difference between front and rear standard.
Rise, fall, and shift aren't really focusing movements.Be very careful moving the front lens standard to control focus.
That makes sense. As far as horizontal movement, there is no difference between front and rear standard.
Well, he did say:
Rise, fall, and shift aren't really focusing movements.
... that said, when ever you move the rear standard away from the front standard the area of of film which needs to be covered actually decreases whereas whenever the lens standard is altered at all the covering power of the lens is diminished. ...
Nothing, i'd say.
It's - quite frankly - nonsense.
Steve, how do Sinar make things complicated?
The F camera is as (un)complicated as any camera available, with the exception of teh P camera, which is the easiest and quickest to use by far.
I believe Ralph and I have cleared things up via a PM where my terminology was taken in a different context than I had intended and vice versa.
[...]
I'd be more concerned with encouraging a beginner to make focus corrections with the lens standard rather than the rear standard with regard to lens covering capabilities as well as going away from the sweet spot of the image circle. [...]
Hello everyone,
I m still Learning the LF so please help me with this issue,
To set the correct (optimum) plain of focus, is it correct to focus on far, then focus on near, then bring the focus down to about the top third of the Ground Glass. I found that this theory is the same as the usual 35mm technique. Can this be true?
I have a Sinar F2 system.
Thanks.
Be very careful moving the front lens standard to control focus. The image circle of the lens will get used up considerably faster than when using the rear standard.
A simple formula that has served me well over the years, determine the 3 dimensional shape of your composition, if the shape resembles a cube then the only thing that will increase depth of field is F stops. If the shape resembles a rectangle in anyway, swing / tilt the rear lens standard AWAY from the longest plane of the rectangle or if you must use the lens standard then swing / tilt the lens TOWARDS the longest plane of the rectangle.
Enjoy the format
I assume you mean using front swings and tilts in order to place/orient the plane of critical focus, not simply "moving the front lens standard to control focus." Obviously, whether you use the front or the rear to simply focus the image will have no effect on where the film sits within the image circle.
Assuming that this is true, I still do not see how your advice is practically applicable. If one does not wish to distort the shape of the image, then front swings and tilts are the only way to place/orient the place of focus, drawbacks be damned.
Additionally, it is an extremely rare occasion (i.e. never, in my experience) in which I have used front swing and/or tilt to such an extreme that the film reaches the edge of the image circle, using a lens that was designed to be tilted and swung. In what composition would you ever need that much tilt or swing? Most of the time I use under five degrees of them. It is rare that I would even need any more than the 15 degrees that my Speed Graphic or Technikas allow. Even in the rare cases in which I have tilted the front standard to approaching 45 degrees in order to get a horizontally-oriented plane of focus, I did not run out of image circle to use.
So, not only do the statements not make sense, but even if they did make sense, it would not be a practical concern - and certainly not a general concern - unless using lenses with small image circles for extreme movements...which only a blind Bozo would do anyhow, since you can see the image circle right on the ground glass!
It's been established that my context of "moving the rear standard" meant moving the film plane "off" parallel axis with the lens. I have cordially and without name calling cleared that issue up with Ralph thru PM's.
Further, my initial comments were not drop dead rules, rather a word of caution to a new comer to the LF world, one who might not have the incredible resources you must have to secure a lens with covering power @ 45 degrees front tilt while still staying within the given image circle.
Lastly, had you not used your time to amass 4000+ posts, your practical photographing experiences might have aided in a scenario where a 7x17 camera with no front movements in vertical orientation, only rear swing and tilt with camera approx. 2 feet off the ground and a tall building in the background could be in sharp focus @ nearly wide open while still preventing any vertical lines from converging in the slightest. But, I thought one couldn't move the rear standard and still preserve perspective, sorry, I did not know the rear standard was off limits
How??? by tipping the camera forward ( lens standard ) and then pulling the rear standard back to a vertical and parallel orientation to the building.
Looking back to my Blind Bozo days I might have reasoned that because I have only posted 10 % of 4000+ that I may have had 90 % more time to actually make photographs, however, that seems impractical to me given the wisdom of my years.
I really get a kick out of "forum photographers" who have to exert their absolute expertise with the written word rather than making and sharing photographs. So here again, the very best thing about these forums is also the worst, so much erroneous information is given out to the unsuspecting and uninformed new comer.
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