Differences

This shows you the differences between two versions of the page.

--- doc:appunti:hardware:olympus-e-m10:manual_lens [2022/12/15 10:13] – [Third party lens manufacturer] niccolo
+++ doc:appunti:hardware:olympus-e-m10:manual_lens [2025/11/10 17:38] (current) – [Meike 25mm f1.8 Specs] niccolo
@@ Line 15: / Line 15: @@
 The body of the lens is build from **metal**, so it feels sturdy and solid. The aperture ring does not have mechanical feedback over the stops: it turns smoothly from **f/1.8** to **f/16** with a little friction, so it should not move inadvertently.
 The focus ring also has a little friction that should prevent unwanted moves, the external element does not rotate on focusing, so you can mount e.g. a **49 mm polarizer filter** and it will **not rotate** on focusing. A depth of field scale is printed on the lens body (but it is **totally wrong**, see below).
+===== Meike 25mm f1.8 Specs =====
+Lens specification as reported on the [[https://meikeglobal.com/en-it/collections/meike-lens-1/products/2518m43|vendor page]]:
+^ Focal Length            | 25 mm  |
+^ Maximum Aperture        | f/1.8  |
+^ Minimun Aperture        | f/16  |
+^ Diaphragm Blades        | 9  |
+^ Filter Size             | 49 mm  |
+^ APS-C Visual angle      | diagonal 61° horizontal 50° vertical 35°  |
+^ Lens construction       | 7 elements in 5 groups, multi-layer coatings  |
+^ Minimun Focus Distance  | 0.25 m  |
+^ Diameter                | 60.5 mm  |
+^ Length                  | 40.9 mm  |
+^ Product Weight          | 190 g  |
 ===== Modes M, S, A and P =====
@@ Line 207: / Line 223: @@
 There are several vendors of manual lenses that can be mounted on cameras of well known manufacturers, such as Olympus, Canon, Nikon, etc. They offer good quality for a fraction of the cost of the original lenses. Almost all are Chinese manufacturer, which have reached very high standards of quality. Here a partial list of some of them, please follow the link to **sponsor my affiliate programs**.
-  * **[[https://www.amazon.it//review/R37KAL7C2ON8XB/ref=cm_rv_eml_rv0_rv|My review of the Meike 25mm f/1.8 on the Amazon site]]**
   * **[[https://meikeglobal.com/|Meike]]**
-  * **[[https://7artisans.store/?ref=FRFtTFVb|7Artisans]]**
   * **[[https://www.pergear.com/?ref=2BPZm|Pergear]]**
-  * **[[https://7artisans.store/products/25mm-f1-8?ref=FRFtTFVb|Manual lens 25mm f/1.8 by 7Artisans]]**
+  * **[[https://7artisans.store/?ref=FRFtTFVb|7Artisans]]**
-  * **Risespray**
   * **[[https://ttartisan.com/|TTArtisan]]**
+  * **[[https://www.amazon.it//review/R37KAL7C2ON8XB/ref=cm_rv_eml_rv0_rv|My review of the Meike 25mm f/1.8 on the Amazon site]]**
+  * **[[https://www.pergear.com/products/pergear-7-5mm-f2-8-fish-eye-manual-focus-fixed-lens?ref=2BPZm|Pergear 7.5mm F2.8 fish eye]]**
+  * **[[https://7artisans.store/products/25mm-f1-8?ref=FRFtTFVb|Manual lens 25mm f/1.8 by 7Artisans]]**