rigacci.org

User Tools

Site Tools

Trace: • Fill-in Flash • Flash integrato
doc:appunti:hardware:olympus-e-m10:manual_lens

Differences

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

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
doc:appunti:hardware:olympus-e-m10:manual_lens [2022/11/16 10:40] – [Depth of field] niccolodoc: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 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). 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 ===== ===== Modes M, S, A and P =====
Line 178: Line 194:
 ==== Depth of field in portraits ==== ==== Depth of field in portraits ====
  
 +Here is an handy table to know the depth of field when shoting portraits. I think that the wider apertures of the Meike (f/numbers below 4.7) are extremely effective starting from medium or more distant shots. With close-ups, care must be taken that not all parts of the head may be in focus.
  
 ^  Framing with a 25 mm lens, MFT sensor (50 mm eq.)  ^^^  Depth of field  ^^^ ^  Framing with a 25 mm lens, MFT sensor (50 mm eq.)  ^^^  Depth of field  ^^^
 ^ Shot type  ^ Height dim.  ^ Focal length  ^  f/1.8  ^  f/5.6  ^  f/16  ^ ^ Shot type  ^ Height dim.  ^ Focal length  ^  f/1.8  ^  f/5.6  ^  f/16  ^
-| Choker  (eyebrows and mouth)     |   20 cm |   42 cm |    1 cm |    5 cm |   13 cm | +| Choker  (from eyebrows to mouth)  |   20 cm |   42 cm |    1 cm |    5 cm |   13 cm | 
-| Close-up  (shoulder and head)    |   40 cm |   84 cm |    6 cm |   19 cm |   58 cm | +| Close-up  (shoulder and head)     |   40 cm |   84 cm |    6 cm |   19 cm |   58 cm | 
-| Medium shot (from the waist up)  |   70 cm |  146 cm |   18 cm |   59 cm |  231 cm | +| Medium shot (from the waist up)   |   70 cm |  146 cm |   18 cm |   59 cm |  231 cm | 
-| American shot  (mid thigh)       |  120 cm |  250 cm |   54 cm |  189 cm |    49 m | +| American shot  (mid thigh)        |  120 cm |  250 cm |   54 cm |  189 cm |    49 m | 
-| Full shot (head to toes)         |  200 cm |  417 cm |  153 cm |  687 cm |       ∞ |+| Full shot (head to toes)          |  200 cm |  417 cm |  153 cm |  687 cm |       ∞ |
  
 ===== EXIF data ===== ===== EXIF data =====
Line 206: 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**. 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://meikeglobal.com/|Meike]]**
 +  * **[[https://www.pergear.com/?ref=2BPZm|Pergear]]**
   * **[[https://7artisans.store/?ref=FRFtTFVb|7Artisans]]**   * **[[https://7artisans.store/?ref=FRFtTFVb|7Artisans]]**
-  * **[[https://7artisans.store/products/25mm-f1-8?ref=FRFtTFVb|Manual lens 25mm f/1.8 by 7Artisans]]** 
-  * **Risespray** 
   * **[[https://ttartisan.com/|TTArtisan]]**   * **[[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]]**
 +
  
doc/appunti/hardware/olympus-e-m10/manual_lens.1668591637.txt.gz · Last modified: by niccolo