Wide angle

Full frame

Mamiya / Sekor SX 21mm f/4.0 Auto

Name: Mamiya / Sekor SX 21mm f/4.0 Auto
Brand: Mamiya
SKU: mamiya-sekor-sx-21mm-f-4-0-auto
Availability: InStock

4.4

(4 reviews)

Focal Length

21mm

Aperture

f/4-16

Mount

M42

Weight

220g

Mamiya / Sekor SX 21mm f/4.0 Auto is a manual focus wide angle lens for full frame cameras.

Optical design

Average brightness in this league Has 5 aperture blades, this number of blades are commonly used. Having rounded blades provides out of focus circle shape closer to a circle.

Physical characteristics

With a lens filter diameter of 58 mm commonly filter size, offers a wide range of filter options. Weights 220 grams so consider putting to your camera bag.

Mamiya / Sekor SX 21mm f/4.0 Auto purchase history

eBay Price HistoryeBay Auction (high-low)

Purchases (179)

Jul 30, 2025$34.00
Jul 28, 2025$93.00
Jul 19, 2025$38.00
Jul 17, 2025$47.00
Jul 7, 2025$123.00
Jul 7, 2025$36.00
Jun 28, 2025$70.00
Jun 28, 2025$93.00
Jun 28, 2025$94.00
Jun 28, 2025$71.00
Jun 25, 2025$112.00
Jun 25, 2025$113.00
Jun 24, 2025$112.00
Jun 24, 2025$113.00
Jun 15, 2025$70.00
Jun 15, 2025$71.00
Jun 9, 2025$104.00
Jun 9, 2025$102.00
Jun 9, 2025$103.00
Jun 7, 2025$74.00
Jun 7, 2025$75.00
Jun 7, 2025$76.00
Jun 3, 2025$37.00
Jun 3, 2025$38.00
May 29, 2025$28.00
May 29, 2025$29.00
May 18, 2025$75.00
May 18, 2025$76.00
May 18, 2025$77.00
May 18, 2025$79.00
May 11, 2025$160.00
May 11, 2025$162.00
May 11, 2025$168.00
May 11, 2025$53.00
May 11, 2025$54.00
May 11, 2025$56.00
May 11, 2025$158.00
May 7, 2025$100.00
May 7, 2025$101.00
May 7, 2025$102.00
May 7, 2025$106.00
May 7, 2025$112.00
May 7, 2025$113.00
May 7, 2025$115.00
May 7, 2025$23.00
May 7, 2025$119.00
May 7, 2025$24.00
May 7, 2025$25.00
May 6, 2025$19.00
May 6, 2025$20.00
Apr 28, 2025$11.00
Apr 27, 2025$48.00
Apr 27, 2025$49.00
Apr 27, 2025$50.00
Apr 27, 2025$47.00
Apr 25, 2025$48.00
Apr 25, 2025$49.00
Apr 25, 2025$50.00
Apr 25, 2025$47.00
Apr 20, 2025$46.00
Apr 20, 2025$47.00
Apr 20, 2025$112.00
Apr 20, 2025$49.00
Apr 20, 2025$115.00
Apr 20, 2025$118.00
Apr 20, 2025$119.00
Apr 4, 2025$488.00
Apr 4, 2025$506.00
Apr 4, 2025$500.00
Mar 29, 2025$97.00
Mar 29, 2025$98.00
Mar 29, 2025$100.00
Mar 29, 2025$95.00
Mar 22, 2025$96.00
Mar 22, 2025$98.00
Mar 22, 2025$99.00
Mar 22, 2025$101.00
Mar 16, 2025$57.00
Mar 16, 2025$59.00
Mar 16, 2025$61.00
Mar 14, 2025$88.00
Mar 14, 2025$89.00
Mar 14, 2025$91.00
Mar 14, 2025$86.00
Mar 13, 2025$29.00
Mar 13, 2025$30.00
Mar 6, 2025$40.00
Mar 6, 2025$39.00
Mar 5, 2025$169.00
Mar 5, 2025$170.00
Mar 5, 2025$164.00
Mar 5, 2025$166.00
Mar 3, 2025$74.00
Mar 3, 2025$76.00
Feb 26, 2025$73.00
Feb 26, 2025$71.00
Feb 22, 2025$55.00
Feb 22, 2025$56.00
Feb 22, 2025$57.00
Feb 22, 2025$28.00
Feb 22, 2025$29.00
Feb 19, 2025$96.00
Feb 19, 2025$97.00
Feb 19, 2025$35.00
Feb 19, 2025$36.00
Feb 19, 2025$93.00
Feb 19, 2025$94.00
Feb 16, 2025$245.00
Feb 16, 2025$252.00
Feb 16, 2025$253.00
Feb 13, 2025$32.00
Feb 13, 2025$49.00
Feb 13, 2025$50.00
Feb 13, 2025$51.00
Feb 13, 2025$53.00
Feb 13, 2025$29.00
Feb 13, 2025$30.00
Feb 5, 2025$264.00
Feb 5, 2025$274.00
Feb 5, 2025$262.00
Feb 5, 2025$255.00
Feb 4, 2025$40.00
Feb 4, 2025$41.00
Feb 4, 2025$42.00
Feb 4, 2025$39.00
Feb 3, 2025$35.00
Feb 3, 2025$36.00
Feb 3, 2025$38.00
Jan 23, 2025$137.00
Jan 23, 2025$131.00
Jan 23, 2025$132.00
Jan 21, 2025$40.00
Jan 21, 2025$41.00
Jan 21, 2025$42.00
Jan 20, 2025$40.00
Jan 20, 2025$41.00
Jan 20, 2025$35.00
Jan 20, 2025$37.00
Jan 10, 2025$21.00
Jan 10, 2025$22.00
Jan 10, 2025$23.00
Jan 8, 2025$275.00
Jan 8, 2025$252.00
Jan 8, 2025$262.00
Jan 8, 2025$251.00
Jan 6, 2025$40.00
Jan 6, 2025$41.00
Jan 6, 2025$42.00
Jan 6, 2025$44.00
Jan 6, 2025$45.00
Jan 6, 2025$46.00
Jan 6, 2025$47.00
Jan 6, 2025$50.00
Dec 31, 2024$56.00
Dec 31, 2024$58.00
Dec 31, 2024$61.00
Dec 29, 2024$35.00
Dec 29, 2024$37.00
Dec 29, 2024$39.00
Dec 6, 2024$422.00
Dec 6, 2024$199.00
Dec 6, 2024$53.00
Dec 6, 2024$55.00
Dec 6, 2024$442.00
Dec 6, 2024$190.00
Dec 4, 2024$165.00
Dec 4, 2024$157.00
Nov 25, 2024$21.00
Nov 25, 2024$22.00
Nov 19, 2024$26.00
Nov 19, 2024$28.00
Nov 14, 2024$94.00
Nov 9, 2024$52.00
Oct 26, 2024$168.00
Oct 26, 2024$187.00
Oct 24, 2024$77.00
Oct 21, 2024$166.00
Oct 2, 2024$587.00
Oct 2, 2024$607.00

Auctions (9)

Aug 4, 2025High: $169.30 / Low: $24.99
Jul 4, 2025High: $169.30 / Low: $11.50
Jun 12, 2025High: $510.00 / Low: $11.50
May 19, 2025High: $169.30 / Low: $19.99
Apr 27, 2025High: $599.00 / Low: $29.00
Apr 3, 2025High: $599.00 / Low: $29.00
Mar 10, 2025High: $259.99 / Low: $29.00
Feb 15, 2025High: $259.99 / Low: $19.95
Jan 18, 2025High: $400.00 / Low: $19.95

What is the Mamiya / Sekor SX 21mm f/4.0 Auto?

Mamiya / Sekor SX 21mm f/4.0 Auto is a camera lens with 21mm focal length, a maximum aperture of f/4/16, for the M42 mount, supporting the Full frame format, weighing 220g.

Prices and availability are sourced from eBay sold listings and live auctions at request time.

eBay Auctions

No active auctions found.

Technical Specifications

Optical

Focal Length21mm

Aperturef/4-16

Min Focus Distance0.45m

FocusingManual Focus

Physical

Weight220g

Lengthmm

Filter Thread58mm

MountM42

FormatFull frame

Similar Lenses

Fujinon-F 16mm f/2.8 EBC

~$308

4.6/5

Better rating (4.8)

Fujinon-SW 19mm f/3.5 EBC

~$700

4.5/5

Better rating (4.5)

Kenlock-Mc.tor Wide 20mm f/2.8 MC

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Better rating (4)

Sigma-XQ Filtermatic Multi-Coated 24mm f/2.8

Reviews

Perfect5.0/5

Perfect Perfect

Very clean example of this vintage lens....5.0/5

Very clean example of this vintage lens.... Very clean example of this vintage lens. Sharp and high res pictures in digital. I am quite pleased.

Perfect5.0/5

Perfect Perfect

Frequently Asked Questions

What is the Mamiya / Sekor SX 21mm f/4.0 Auto?

Mamiya / Sekor SX 21mm f/4.0 Auto is a camera lens with 21mm focal length, a maximum aperture of f/4/16, for the M42 mount, supporting the Full frame format, weighing 220g.

What mount is the Mamiya / Sekor SX 21mm f/4.0 Auto compatible with?

Mamiya / Sekor SX 21mm f/4.0 Auto uses a M42 mount and supports the Full frame format.

How much does the Mamiya / Sekor SX 21mm f/4.0 Auto cost?

Based on recent eBay sold listings the Mamiya / Sekor SX 21mm f/4.0 Auto typically sells for around $11.00. Actual prices vary with condition and seller.

Is the Mamiya / Sekor SX 21mm f/4.0 Auto a good lens?

Mamiya / Sekor SX 21mm f/4.0 Auto has a community rating of 4.4/5 from 4 review(s).

Which lenses are similar to the Mamiya / Sekor SX 21mm f/4.0 Auto?

Similar lenses include Fujinon-F 16mm f/2.8 EBC, Fujinon-SW 19mm f/3.5 EBC, Kenlock-Mc.tor Wide 20mm f/2.8 MC.

Current Pricing

Latest Price

€80.00

Find on eBay

Review Summary

Overall Rating

5.0

Based on 2 reviewers