Rikenon Rikenon 28mm f2.8

M42 · 28mm · f/2.8

ยังไม่มีภาพสำหรับเลนส์นี้

ปีผลิต

1984

ผลิตที่

-

สูตรเลนส์

7 elements in 7 groups

อัปเดต

4 ก.ค. 2569

เรื่องราวของเลนส์

The Ricoh Rikenon P 28mm f/2.8 is a compact manual-focus wide-angle prime released around 1984 as part of Ricoh's P series, designed primarily for the Ricoh XR-P SLR and other bodies in Ricoh's XR series. It was introduced alongside the Ricoh XR-P, a camera notable for supporting Multi Program AE—automatically setting both shutter and aperture—which was an advanced feature for 1984. Because the lens uses the Pentax K mount, it can be mounted directly on Pentax bodies without an adapter, and adapted to mirrorless systems (e.g., Sony via PK-NEX). The reviews note that earlier versions may feature a more robust metal barrel—possibly Tomioka-sourced—while later iterations used lighter materials and occasionally included macro labeling. No established nicknames or community jargon are evidenced in the reviews. Its cult following stems from its very low price, its excellent sharpness for a budget wide-angle, its neutral rendering, and its compact, travel-friendly form factor. One reviewer sought it out specifically as a wide-angle vintage lens to echo the look of the Ricoh GR1v compact film camera, and found the out-of-focus rendering on full-frame film actually more pleasing than the GR1v.

สรุป: The Ricoh Rikenon P 28mm f/2.8 is a bargain compact wide-angle that punches well above its price—sharp from f/4 to f/11, neutral in color, and pleasingly small for travel, street, and film shooters. It's ideal for someone wanting an affordable, K-mount-native vintage 28mm with good edge performance, provided they can live with its barrel distortion and don't expect dramatic bokeh.

คาแรกเตอร์ของภาพ

โบเก้

คาแรคเตอร์ค่อนข้างเรียบกว่าเลนส์ 50mm แบบ “fast” แต่สามารถให้ bokeh ที่สวยงามเมื่อถ่ายที่รูรับแสงกว้างสุดในที่แสงน้อย

โทนสี

การถ่ายทอดสีที่เป็นกลาง พร้อมการไล่โทนสีอย่างเรียบลื่นและนุ่มนวล

ความคม (เปิดสุด)

ให้ความคมยอดเยี่ยม โดยเฉพาะช่วงรูรับแสง f/4–f/11 และให้คุณภาพขอบภาพที่น่าประหลาดใจสำหรับเลนส์ 28 มม. ราคาประหยัด

รีวิวจากผู้ใช้

ข้อดี
  • Excellent sharpness across f/4 to f/11 for such an inexpensive lens
  • Neutral color rendition and smooth color gradation
  • Surprisingly good edge/corner performance compared to other budget 28mm lenses
  • Compact, lightweight form factor ideal for travel, street, and compact film bodies
  • Beautiful background blur when shot wide open in low light on full-frame film—one reviewer preferred it to the Ricoh GR1v
  • Very low average price and strong value (100% of reviewers recommend it)
  • Directly K-mount compatible with Pentax DSLRs without an adapter
ข้อเสีย
  • Noticeable barrel distortion in architectural shots
  • Corner performance limitations (implied as a common critique in the review database, though generally still good for the class)
  • Bokeh is subdued compared to a fast 50mm, so it's not a background-melting lens
เทคนิคการใช้
  • Stop down to f/4–f/11 for the sharpest results across the frame
  • Use a full-frame body to preserve the intended 28mm wide angle—on APS-C the effective field of view narrows by 1.5x
  • Shoot wide open in low light for the most attractive background blur
  • Avoid using it for critical architectural work, or correct for its barrel distortion in post

แหล่งอ้างอิง (1)

Web-grounded synthesissecondary

The Ricoh Rikenon P 28mm f/2.8 is a compact manual-focus wide-angle prime released around 1984 as part of Ricoh's P series, designed primarily for the Ricoh XR-P SLR and other bodies in Ricoh's XR series. It was introduced alongside the Ricoh XR-P, a camera notable for supporting Multi Program AE—automatically setting both shutter and aperture—which was an advanced feature for 1984. Because the lens uses the Pentax K mount, it can be mounted directly on Pentax bodies without an adapter, and adapted to mirrorless systems (e.g., Sony via PK-NEX). The reviews note that earlier versions may feature a more robust metal barrel—possibly Tomioka-sourced—while later iterations used lighter materials and occasionally included macro labeling. No established nicknames or community jargon are evidenced in the reviews. Its cult following stems from its very low price, its excellent sharpness for a budget wide-angle, its neutral rendering, and its compact, travel-friendly form factor. One reviewer sought it out specifically as a wide-angle vintage lens to echo the look of the Ricoh GR1v compact film camera, and found the out-of-focus rendering on full-frame film actually more pleasing than the GR1v.

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