The APS-C 35 mm OSS prime supports camera-controlled AF, DMF and stabilization; its exact listing does not document the other lenses’ forced-distortion setting.
- Connection
- Direct mount
- What was checked
- Direct-mount stills in APS-C capture, with only the explicitly named RAW or movie-mode exceptions. Online manufacturer documentation; no hands-on test.
- Sources checked
The next source check for this pair is overdue. Next source check due .
Sensor coverage & crop
LimitedThis APS-C lens gives 52.5 mm full-frame-equivalent framing in cropped capture.
- a7 IV APS-C capture; still-image size limits follow the linked crop rule.
Autofocus
SupportedThe lens manual supports autofocus selected through the camera; the lens has no AF/MF switch.
- Exact APS-C SEL35F18, not SEL35F18F. Still-image AF-S/AF-C operation; burst performance is not established.
Manual focus
SupportedThe lens supports DMF for manual refinement after autofocus, as well as full manual focus.
- Choose DMF or MF on the body for stills. The body allows only AF-C and MF in Movie/S&Q, so the DMF finding does not extend to those modes.
Stabilization
SupportedOptical SteadyShot is built into the lens and is controlled through the camera’s still-image stabilization menu.
- The lens parts list shows no SteadyShot switch. No combined optical/sensor-shift stop rating inferred.
Lens corrections
Not verifiedThe exact compatibility entry lists APS-C framing but does not specify whether distortion correction is forced to Auto for this lens.
- Do not copy the forced-Auto restriction from the four other lenses in this batch.
Firmware conditions
LimitedBody firmware 1.10 or later is required for Lossless Compressed RAW L/M/S choices. In APS-C capture, L is unavailable; M/S developed sizes follow JPEG/HEIF sizes.
- This version requirement is specific to the RAW-size feature, not a minimum firmware claim for basic lens operation. Sony-application RAW development; RAW aspect ratio is 3:2.
Not covered by the sources
- The reviewed exact-pair page gives no numeric minimum firmware for ordinary lens operation. Null firmware fields mean unspecified versions, not universal all-version support.
- Maximum burst rate, sustained subject-tracking performance and combined stabilization effectiveness for this exact pair were not verified.
- The reviewed crop rule covers JPEG/HEIF stills. Uncompressed/compressed RAW output details and a complete video-format matrix remain outside its scope.
- A positive exact-pair source is still needed for the selectable distortion-correction behavior; lack of a restriction bullet is not proof of unrestricted operation.
Sources and review notes
Firmware in scope: camera not stated, lens not stated, adapter not stated. “Not stated” means the documents do not give a version range. It does not mean every version works.
Researched 2026-09-07 by an AI research agent reading the documents below, then source-checked 2026-09-07. Nobody has tested this pair by hand. How the research works
- ILCE-7M4 + SEL35F18 — Compatibility Information — Exact body/lens result and restriction bullets. Opened through direct HTTPS after web fetch failed. APS-C framing is listed. No distortion-control restriction is listed; absence is not a positive all-settings guarantee. Accessed 2026-09-07.
- E 35mm F1.8 OSS — Specifications — Lens Specifications. Exact lens identity, E-mount, APS-C format, equivalent field of view, aperture, focus distance and stabilization specification. Accessed 2026-09-07.
- ILCE-7M4 Help Guide — APS-C S35 Shooting — Menu item details and Note. On/Auto permit APS-C lenses; Off remains selectable for stills but can darken edges. 4K60p/50p locks On. No firmware minimum stated. Accessed 2026-09-07.
- ILCE-7M4 Help Guide — JPEG Image Size/HEIF Image Size — 3:2 table; Hint; Note. APS-C cannot select L; L temporarily becomes M. M is 14M, 4608×3072 for 3:2. Does not establish every RAW format. Accessed 2026-09-07.
- E 35mm F1.8 OSS — Operating Instructions — PDF page 1, English Identifying the Parts, Focusing and Specifications. Exact APS-C SEL35F18, not full-frame SEL35F18F. AF, DMF and MF set through camera; OSS without a lens switch in the parts list. Accessed 2026-09-07.
- ILCE-7M4 Help Guide — Selecting the focus method — Menu item details; Note. Body AF-S/AF-C, DMF and MF operation; only AF-C and MF in Movie/S&Q. AF-A has its own phase-detection prerequisite and is not asserted in these packets. Accessed 2026-09-07.
- ILCE-7M4 Help Guide — SteadyShot (still image) — Menu item details; Note. Camera menu turns stabilization on/off unless the lens has a SteadyShot switch; that switch then controls the setting. Accessed 2026-09-07.
- ILCE-7M4 Help Guide — Specifications — System; Image sensor; SteadyShot. Exact body is full-frame E-mount with sensor-shift stabilization. No combined lens/body stop rating inferred. Accessed 2026-09-07.
- ILCE-7M4 Help Guide — Lens Compensation — Distortion Comp.; Note. Some compatible lenses lock distortion correction to Auto. Exact pair pages, rather than this general warning alone, identify four such lenses here. Accessed 2026-09-07.
- ILCE-7M4 Help Guide — RAW File Type — Lossless Comp (L)/(M)/(S) and firmware footnote. L/M/S lossless RAW requires body firmware 1.10 or later. L is full-frame only; developed M/S pixels follow JPEG/HEIF sizes. No all-format RAW claim. Accessed 2026-09-07.
Related rules: a7 IV stills with these five APS-C lenses →