My real budget went towards the back and a technical camera and lenses, but since I bought the DF+ and modern Schneider 80mm lens, I thought it might be nice to take advantage of the low cost 645AF lenses for a couple of useful focal lengths. Experimental results of different zoom lens cameras validate the feasibility and effectiveness of the proposed method.I just bought a pair of older Mamiya 645 AF lenses to use with my Phase One DF+ & IQ160. Using the proposed method, we can rectify all images from the calibrated zoom lens camera. Based on some selected zoom settings, the optimized quadratic functions of distortion parameters are obtained from the global perspective. To gain a rectified image at any zoom settings, a global distortion correction modeling method is developed with bundle adjustment. Then, the appropriate distortion correction model for a zoom lens camera is derived from the comparisons of some existing models and methods. In this paper, a distortion assessment method without coupling effect is depicted by an elaborated chessboard pattern. Thus, a novel sequential distortion correction method for a zoom lens camera is proposed in this study. However, the challenges of distortion prediction within the whole focal range limit the widespread application of zoom lens cameras greatly. Note: Author names will be searched in the keywords field, also, but that may find papers where the person is mentioned, rather than papers they authored.įor visual measurement under dynamic scenarios, a zoom lens camera is more flexible than a fixed one.Use a comma to separate multiple people: J Smith, RL Jones, Macarthur.Use these formats for best results: Smith or J Smith.For best results, use the separate Authors field to search for author names.Use quotation marks ' ' around specific phrases where you want the entire phrase only.Question mark (?) - Example: 'gr?y' retrieves documents containing 'grey' or 'gray'.Asterisk ( * ) - Example: 'elect*' retrieves documents containing 'electron,' 'electronic,' and 'electricity'.

Improve efficiency in your search by using wildcards.

Example: (photons AND downconversion) - pump.

Example: (diode OR solid-state) AND laser.

Note the Boolean sign must be in upper-case.

Separate search groups with parentheses and Booleans.

Keep it simple - don't use too many different parameters.

Epaperpress ptlens