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#1
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tilting lens and baseboard
hi all
i saw a picture recently of a bessler enlarger with an easel at about 45degrees and the lens tilted as well my devere has lens tilt but i have never used it i am confused as to how this would actually work i understand that it is basically the same as a view camera but focus and exposure would be massively exaggerated one side of the print would be totally out of focus and would get many stops more light has anybody done any of this kind of work ? what am i missing best robin |
#2
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tilting lens and baseboard
You can use it to correct converging vertical in a print. You should try it. Focus isn't as much of a problem as you might think. I usually just tilt the easel.
Alex Sent from my iPhone using Tapatalk |
#3
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It has limited use and effectively no use if you have a perspective correcting(PC) lens on the camera but if shot with converging verticals because a PC lens wasn't used then this is the way to go
Tim Rudman in his The Photographer's Master Printing Course has a very good and practical section on this The tilt and enlarger lens angle changes are based on the Scheimpflug principle. Google Scheimpflug. There are quite a few references to it. I need to say I haven't tried it yet but as Alex has said it isn't as much of a problem as you think. I think one of the pieces of advice was to use f16 on the enlarger lens for extra DoF Mike |
#4
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A very useful technique that I've used for years mainly with MF and 35mm negatives.
With my Durst enlargers I tilt the head and then adjust the lens board tilt to keep a sharp plane of focus, the difference in exposure is very slight not something I've really notices. There's no exaggeration just nice and simple correction of converging verticals etc. Of course I do this in camera when I shoot LF formats. Ian |
#5
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You should set up a negative which has converging verticals, then try lifting the easel to see the effect on the image. Lifting the easel alone corrects the verticals, but creates a keystone shaped image which means you lose a portion of the image at each side. Tilting the head, I believe, corrects this. It's a useful technique that can improve certain images.
Alex Sent from my iPhone using Tapatalk |
#6
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This is an out line of the rule for tilting the easel.
http://photomi7ch.blogspot.co.uk/201...lugs-rule.html
__________________
Mitch http://photomi7ch.blogspot.com/ If you eliminate the impossible whatever remains no matter how improbable must be the truth. |
#7
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I have tried this but find it difficult to get the right amount of tilt for all three elements. I usually end up threshing about in the dark wondering what elements I should be adjusting. From what has been said above would this be the sequence to set it up?
1) First tilt the easel to get the verticals vertical 2) Tlit the head to get rid of the keystone shape. 3) Finally tilt the lens board to get it all in focus. Tony |
#8
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Quote:
You just tilt the head then tilts the lens board. to get teh plane of focus. Ian |
#9
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Quote:
Tony |
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