Differences

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--- doc:appunti:hardware:olympus-e-m10:pergear_fisheye [2022/12/19 16:43] – [The Pergear 7.5mm F2.8 Fish-Eye] niccolo
+++ doc:appunti:hardware:olympus-e-m10:pergear_fisheye [2022/12/19 16:49] – [The Pergear 7.5mm F2.8 Fish-Eye] niccolo
@@ Line 1: / Line 1: @@
 ====== The Pergear 7.5mm F2.8 Fish-Eye ======
-**Obiettivo manuale fish-eye con la Olympus E-M10 Mark II**
+**Obiettivo manuale fish-eye su Olympus E-M10 Mark II**
 ^ Specifications  ^^
-| Focal length         | 7.5 mm         |
+| Focal length         | 7.5 mm           |
-| Angle of view        | 130° (on MFT)  |
+| Angle of view        | 130° (on MFT)    |
-| Aperture range       | f/2.8 - f/22   |
+| Aperture range       | f/2.8 - f/22     |
-| Focus range          | 12 cm - ∞      |
+| Focus range          | 12 cm - ∞        |
-| External dimensions  | ø61 mm x54 mm  |
+| External dimensions  | ø 61 mm x 54 mm  |
 | Weight (excluding caps and hoods)  | 320 g  |
-The specifications above are provided by the manufacturer and are quite approximative; checking with the various on-line field-of-view calculators (you can try this one at [[https://www.scantips.com/lights/fieldofview.html|www.scantips.com]]), the angle of view for a 7.5 mm lens on a Micro Four Thirds sensor should be 98.15°. I made some measures on the field and it turned out that the actual **horizontal field of view** is about **107°**, which - mounted on a Micro Four Thirds system - is equivalent to a lens of **6.5 mm** focal lenght.
+The specifications above are provided by the manufacturer and are quite approximative; checking with the various on-line field-of-view calculators (you can try this one at [[https://www.scantips.com/lights/fieldofview.html|www.scantips.com]]), the angle of view for a 7.5 mm lens on a Micro Four Thirds sensor should be 98.15°. I made some measures on the field and it turned out that the actual **horizontal field of view** is about **107°** which, on a Micro Four Thirds system, is equivalent to a lens of **6.5 mm** focal lenght.