Hi,
There is some incomplete information about fishey lenses FOV.
According to the formulas given (
Field of View Calculator - Rectilinear and Fisheye lenses - Bob Atkins Photography) I have made calculations in excell spreadsheet and got the following values:
SMC Pentax-DA 10-17mm (Diag./Horiz.)
APS-C: 180-100 °/ 145-82 ° SMC Pentax-F 17-28mm (Diag./Horiz)
APS-C: 100-58 °/82-49 °
Full frame: 159-91 °/128-75 ° (values has to be checked, as at 17 mm the lens probably doesn't obey ideal equisolid fishey equation, and FOV might really be 180° diagonal)
Samyang 8mm (Diag./Horiz.)
APS-C: 166 °/ 146 ° (values has to be checked, as the lens probably don't obey ideal stereographic fishey equation, and FOV might really be 180° diagonal)
I haven't checked other fisheyes in the database.
Please remove the indication of horizontal FOV, or alternatively, please add values for horizontal FOV (what are the correct values I don't know, I am not sure if my calculated values are correct).
Thanks
Tadas Misiūnas
Thread URL:
Pentax Lenses - Pentax Lens Reviews & Lens Database
Last edited by photolady95; 11-23-2018 at 09:00 AM.