Assessment of lens sharpness and depth of field based on psychophysical method

Name: C. Saksirikosol

Address: Pathumthani

Organization : Rajamangala University of Technology Thanyaburi. Faculty of Mass Communication Technology

Name: K. Rattanakasamsuk

Address: Pathumthani

Organization : Rajamangala University of Technology Thanyaburi. Faculty of Mass Communication Technology

Name: P. Dolkit

Address: Pathumthani

Organization : Rajamangala University of Technology Thanyaburi. Faculty of Mass Communication Technology

keyword: Resolution

ThaSH: Lenses

; Sharpness

Abstract: This research aims to assess the performance of the lens in terms of image sharpness and acceptable level of Depth of Field of three types of lens which are 18-105 mm f/3.5-5.6G ,50 mm f/1.8D ,and 50 mm f/1.4G. The sharpness performance was measured by comparing the photo details in the resolution test chart. The image sharpness level was examined by taking photos in five different focal distances which were focal length, +/- 10 cm focal length and +/-20 cm focal length. Also, the aperture of photo taking was specified at 8. To evaluate the result, the pairwise comparison method was used to collect the data from ten subjects who were had normal vision or to normal corrected. The performance result of sharpness expression of lens orderly were 50 mm f/1.4G, 50 mm f/1.8D and 18-105 mm f/3.5-5.6G in terms of acceptable sharpness of human eyesight which each lens had different depth of field

Rajamangala University of Technology Thanyaburi

Address: PATHUM THANI

Email: elibrary@mail.rmutt.ac.th

Created: 2013

Modified: 2014-02-06

Issued: 2014-02-06

บทความ/Article

application/pdf

BibliograpyCitation : ACA2013Thanyaburi: Blooming Color for Life December 11-14, 2013, p. 289-292

eng

©copyrights Rajamangala Univetsity of Technology Thanyaburi

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