Ricoh GR: Lens

Lens Characteristics in Short | A Few Technical Data | Lens Reviews | Some Quotations Regarding the Lens (From Reviews) | References

On this page, I would like to discuss one the specific characteristics that lead me to buy the Ricoh GR, namely the lens. I investigate what the available test results and the reviewers say, and I also offer links to camera reviews.

 

Lens Characteristics in Short

The Ricoh GR features a fixed Ricoh GR 18.3mm f/2.8 (28 mm equiv.) lens (7 elements, 5 groups (2 aspheric elements), 9 diaphragm blades). The camera offers two crop modes: 35 mm and 47 mm (equivalent), which, of course, reduce the Megapixel count considerably (10.3 and 5.6 Megapixels). At least, the 35 mm option is useful at times. In addition, a wide conversion lens GW-3 for 21mm (equiv.) is available (requires lens hood and adapter GH-3).

 

Figures: Ricoh GR in the "on" state - from the front (left) and from above (right) - you can see how much the lens protrudes in the "on" state.

Manual distance is set by pressing the macro/up button and turning the up-down dial, which I find cumbersome. There are no marks on the lens, but the camera displays distance and depth of field indicators on the LCD screen.

The lens also does not have a filter thread. The lens hood and adapter GH-3, which serves for attaching conversion lenses, can also be used for attaching filters and close-up lenses.

Find more technical information about the lens below.

 

A Few Technical Data

Data Ricoh GR Comment
Lens Ricoh GR lens, 18.3mm f/2.8 (corresponds to 28 mm in 35 mm format)

7 elements, 5 groups (2 aspheric elements), 9 diaphragm blades

A wide conversion lens GW-3 for 21mm (equiv.) is available (requires lens hood and adapter GH-3)
Zoom Crops modes (35 mm, 47 mm equiv.); digital zoom: none The 35 mm and 47 mm (equivalent) crop modes use less pixels (10.3 and 5.6 Megapixels).
Filter diameter None Use the filter adapter GH-3 to attach filters and close-up lenses
Aperture range From 2.8 to 16 in 1/3 EV increments  
Distance setting range Macro: 10 cm (3.9") to infinity; otherwise from 30 cm (11.76") to infinity The camera has a "macro" setting (button)
Smallest object field Approx. 11.2 x 7.5 cm (according to own tests - do not take this too seriously) Magnification: 0.2 (without close-up lens)

Sharpness Data

See Lens Reviews below.

 

Lens Reviews

dpreview.com

On the "Lens Test" page (page 9) of its review of the Ricoh GR, dpreview.com reports results based on a "classic" DxOMark test. Here are some findings:

Test summary:

The dpreview.com results suggest not to go beyond f/8 for best image quality, but even f/16 seems still to be acceptable.

dpreview Studio Shot Comparison Tool - Old Version

Like the Sony RX100 M1, the Ricoh GR was tested with dpreview's old studio shot comparison tool.

The results are meant that you make up your own opinion on the lens...

dpreview Studio Shot Comparison Tool - New Version

The Ricoh GR II, which has the same lens as the GR was already tested with the new studio shot comparison tool (but there is no longer a "resolution" test):

Again, the results are meant that you make up your own opinion on the lens...

DxOMark

On the first "performance" page, a summary of the lens's performance is given:

On the "measurements" page, I find the "DxOMark score map" and the "Sharpness field map" most instructive. On the latter, you can vary aperture (f-number) and focal length. There you can investigate how diffraction sets in at larger f-numbers and also where the lens performs best (between f/2.8 and f/8, in my opinion...).

The DxOMark results also suggest not to go beyond f/8 or f/11 for best image quality.

BTW: It took me some practice to use these pages and to find what I wanted...

 

Some Quotations Regarding the Lens (From Reviews)

Ricoh GR review at Imaging Resource:

Camera Test: Ricoh GR APS-C Compact (Philip J. Ryan):

Sony RX100 Review (Angela Nicholson, TechRadar):

Image quality and resolution:

Ricoh GR review part II (Harold Glit):

Ricoh GR camera review (Oleg Novikov):

 

References

The following online reviews of the Ricoh GR typically include a review of the lens, albeit not as thorough as the reviews from DxOMark and dpreview.com.

 

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14.02.2016