I am a recent user of the Toyo VX125b camera with a 150mm/5.6 APO-Symmar lens. I have discovered that I would like to use a longer lens in many situations for c lose-up shots of details of objects for abstract compositions. Therefore, NOT fo cused at infinity. One of the drawbacks of my camera is that it has limited draw : 325mm absolute max.
My question is: Is there a way (perhaps a mathematical formula)to figure how clo se an object can be to my lens and still be able to focus on it for a 240/5.6 AP O-Symmar and/or a 300/5.6 APO-Symmar? Infinity of course will be no problem. It is the closeness of the object that I want to know about so I can pick a lens th at I can use for detail work without having to get so close to my subject as I h ave to do now with my 150mm lens.
Thanks in advance for any help!
Scott Jones
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