[ta-das]

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

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Last edited by photolady95; 11-23-2018 at 09:00 AM.

[Adam]

It looks like currently only the diagonal values are listed. Will check and add your computed values. Thanks!

@Ole