Best Memory Card for OM SYSTEM PEN
The OM SYSTEM PEN is a 20.4 MP Micro Four Thirds body with one SD slot that stops at UHS-I. B&H lists Cinema 4K 24p at 237–240 Mbps and UHD 4K 24/25/30p at 102–105 Mbps. Both sit inside a V30 floor. The card that matches that bus without an OM-1 V90 is the SanDisk Extreme PRO SDXC UHS-I.
Our Top Picks at a Glance
Reviewed September 2026 · OM SYSTEM PEN · 20.4 MP · single SD UHS-I · 30 fps · 29 RAW / 154 JPEG · 4K 102–105 Mbps · C4K 237–240 Mbps · High Res
UHS-I V30, 200 / 90 MB/s on 128 GB. Covers UHD 4K and C4K 24p on this slot.
Check Price at Amazon Read full review ↓Same UHS-I V30 class. 160 / 120 MB/s on 128 GB Silver. C4K still inside V30.
Check Price at Amazon Read full review ↓U3 / V30, 170 / 80 MB/s on 64 GB. Fine for stills days. Thin for High Res + C4K.
Check Price at Amazon Read full review ↓This page contains affiliate links. A purchase through those links may earn Cameraegg a commission at no extra cost to you.
| Card | Bus / class | Rated speed | PEN job | Buy |
|---|---|---|---|---|
| SanDisk Extreme PRO UHS-I | UHS-I U3 / V30 | 200 / 90 MB/s (128 GB) | UHD 4K + C4K + High Res | Check price |
| Lexar 1066x Silver | UHS-I U3 / V30 | 160 / 120 MB/s (128 GB) | Same V30 row, cheaper write peak | Check price |
| SanDisk Extreme 64 GB | UHS-I U3 / V30 | 170 / 80 MB/s (64 GB) | Stills / short UHD; small for High Res | Check price |
| Extreme PRO UHS-II V90 | UHS-II V90 | 300-class | Works as UHS-I. PEN never asked for V90. | Check price |
How We Picked
Three official facts. This is the single-slot UHS-I PEN, not a UHS-II OM-1 and not the UHS-II EOS R10.
- Weigh the slot, then the movie table. B&H PEN specs: one SD/SDHC/SDXC slot, UHS-I. Internal recording H.264/MOV: 4096 × 2160 at 24p at 237 to 240 Mb/s; 3840 × 2160 at 24/25/30p at 102 to 105 Mb/s; 1920 × 1080 up to 205 Mb/s. Continuous shooting up to 30 fps for 29 RAW or 154 JPEG frames. OM SYSTEM lists the body at 393 g and ships late October 2026. OM’s launch release (9 Sept 2026): 20.37 MP Live MOS, TruePic IX, first PEN with an EVF and IPX1 splash sealing when paired with a sealed lens.
- Read V30 as a 30 MB/s floor, not a V90 slogan. V30 guarantees 30 MB/s (240 Mbps). C4K’s 240 Mbps line sits on that floor. UHD 4K at 105 Mbps is about 13 MB/s — well inside V30. A V90 UHS-II card still works as a UHS-I card. The extra bus is for bodies that publish a UHS-II row. This one does not.
- Size the card for High Res, not for 20.4 MP JPEGs. B&H: High Res Shot combines multiple exposures in-camera. Fstoppers’ spec readout: handheld High Res JPEG/RAW at 8,160 × 6,120 (50 MP); tripod RAW up to 10,368 × 7,776. One slot. 128 GB is the travel size; 32 GB is a from JPEG-only kit cameras.
Detailed Reviews
SanDisk Extreme PRO SDXC UHS-I View on Amazon View on B&H
| SKU family | Extreme PRO SDXC UHS-I — SanDisk |
|---|---|
| Class | UHS-I · U3 · V30 (30 MB/s sustained) |
| Peak (64–128 GB sheet) | Up to 200 MB/s read · up to 90 MB/s write |
| PEN job | 102–105 Mbps UHD and 237–240 Mbps C4K sit inside V30 |
| Capacity | Prefer 128 GB on this single slot |
Why it fits the PEN. This body is not an OM-1. The slot is UHS-I. Extreme PRO UHS-I is the current SanDisk V30 card with a published 90 MB/s write on 128 GB — about 720 Mbps of peak write, which is more than C4K asks for. The V30 floor is what matters for the movie table, not a UHS-II logo.
Take 128 GB. High Res files and C4K 24p share the same card. A 32 GB from a JPEG compact fills up on one computational afternoon.
Check Price on Amazon US, UK, CA, DE → Check Price on B&H
Lexar Professional 1066x SDXC UHS-I Silver View on Amazon View on B&H
| SKU family | Professional 1066x SDXC UHS-I Silver — Lexar |
|---|---|
| Class | UHS-I · U3 · V30 |
| Peak (128 GB class) | Up to 160 MB/s read · up to 120 MB/s write |
| PEN job | Same V30 movie row as Extreme PRO UHS-I |
Why it is Value. Lexar’s 1066x Silver announcement rates the card U3 and V30 with 160 / 120 MB/s. That is the same video class as Extreme PRO UHS-I. The PEN will not unlock a faster bus if you pay for UHS-II. 128 GB Silver is the SKU that matches the one-slot travel kit.
Check Price on Amazon US, UK, CA, DE → Check Price on B&H
SanDisk Extreme SDXC UHS-I View on Amazon View on B&H
| SKU family | Extreme SD UHS-I — SanDisk |
|---|---|
| Class | UHS-I · U3 · V30 |
| Peak (64 GB footnote) | Up to 170 MB/s read · up to 80 MB/s write |
| PEN job | UHD 4K 105 Mbps is fine. C4K + High Res wants more capacity. |
Why it is Budget. SanDisk’s Extreme UHS-I sheet still rates V30 / U3. The 64 GB footnote is 170 / 80 MB/s. That is enough for the 105 Mbps UHD row. It is the wrong size if the day is tripod High Res plus C4K 24p on one card. Step to 128 GB Extreme or Extreme PRO when the clip list grows.
Check Price on Amazon US, UK, CA, DE → Check Price on B&H
If You Need Something Else
V90 UHS-II is the OM-1 / R8. It works in a UHS-I slot. The PEN never published a V90 movie cell.
SanDisk Extreme PRO UHS-II V90 View on Amazon View on B&H
| This slot | B&H: single SD UHS-I. The second row of pins is unused. |
|---|---|
| Class | UHS-II V90 — above the PEN’s 240 Mbps C4K line |
| PEN job | Works. Spends OM-1 money on a UHS-I body. |
Keep V90 for a body that lists UHS-II. Pair this PEN with a V30 UHS-I card and a spare BLS-7.
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Frequently Asked Questions
Why UHS-I V30 is Overall instead of V90
B&H lists the PEN slot as UHS-I. C4K 24p is 237–240 Mbps. V30’s floor is 30 MB/s (240 Mbps). V90 is a faster class on a faster bus that this camera does not switch on.
Whether C4K 240 Mbps needs V60
V60 guarantees 60 MB/s (480 Mbps). The PEN’s C4K line is 240 Mbps, not 480. UHD 4K is 102–105 Mbps. V30 covers both published movie rows. V60 is an R10 HDR-PQ, not a PEN requirement.
Why 128 GB instead of 32 GB
One slot. High Res Shot writes 50 MP handheld frames and larger tripod RAW files. C4K 24p at ~240 Mbps fills a 32 GB card in minutes. 128 GB is the travel size on a body that also does 29 RAW / 154 JPEG at 30 fps.
What the 30 fps buffer actually is
B&H: up to 30 fps for 29 RAW or 154 JPEG frames. That is a buffer length, not a card-class upgrade path. A V90 card does not turn 29 RAW into an OM-1 stack.
Whether camera USB shows 200 MB/s
SanDisk’s 200 MB/s read is a UHS-I reader figure. Offload with a USB 3 reader. The PEN’s USB-C port is for charge and data, not a substitute for the card’s rated read.
Final Verdict
For the OM SYSTEM PEN, buy SanDisk Extreme PRO UHS-I in 128 GB. Take Lexar 1066x Silver when the class is V30 and Extreme PRO is not the price. Take Extreme 64 GB when the day is stills. Leave V90 on the OM-1. This slot is UHS-I. C4K is 240 Mbps, not a V90 slogan.