Workspace reference & confidence check

Flag: ⭐️ Modified: February 14, 2026 7:58 PM Created: October 3, 2025 9:37 AM Master Type: Notes Hide: No Starred: Yes Status: Unassigned

1. Adjusting Aperture on the Sony A7R V

Where to do it: You control aperture via the camera’s mode dial and front/rear control dials.
Recommended method for copy stand work:
1. Set the camera to Aperture Priority (A) mode if you want the camera to pick shutter automatically, or Manual (M) if you want full control over both shutter and aperture.
2. Rotate the front or rear control dial to select your desired f-stop (e.g., f/8–f/11).
3. Check the exposure in Capture One via live view; adjust ISO/shutter if needed to get correct brightness.

Because you’re tethered, you’ll see the effect in real time on your laptop. f/8–f/11 is usually sharpest across the frame for flat objects.

2. Manual vs. Auto-Focus

Reality: On a copy stand with high-resolution RAW, depth of field is shallow at wider apertures, but at f/8–f/11, most of a flat object will be in focus.
Auto-focus can be fine for consistent distances; manual focus helps if you want pixel-perfect control, but in your case, both are producing acceptable results. Focus consistency is more important than method.

Tip: check the edges/corners in Capture One’s 100% zoom occasionally—this is where slight lens softness shows up.

3. Cheat Sheet: Practical A7R V Copy Stand Imaging (FADGI-aligned, but sane)

Category	What Matters	Practical Tip	Why It Relates to FADGI
Resolution / Detail	Max sensor detail for archival capture	Shoot uncompressed RAW at full L image size. Export 4400 ppi for high-detail scans, 1200 ppi for lower-detail.	SFR / spatial detail metric—your pixels cover it.
Aperture / Sharpness	Sharp across frame	Use f/8–f/11; avoids lens soft edges and diffraction.	Affects SFR / effective resolution.
ISO / Noise	Low noise, high dynamic range	Keep ISO 160 for negatives, 400 for prints. Avoid touching camera during exposure.	Noise metric—your sensor handles it naturally; no need to obsess.
Shutter / Vibration	Avoid micro-blur	Tethered release via Capture One; trackpad only. Tripod/copy stand stable.	SFR / sharpness; real-world stability.
Exposure / Tonality	Preserve shadows and highlights	Check histogram in Capture One; avoid clipping. RAW preserves OECF.	Tone reproduction metric—FADGI cares about linearity and dynamic range.
Focus	Critical edges in frame	Manual or AF; check corners at 100% zoom.	Effective resolution / detail capture.
Illumination / Uniformity	Even, diffuse light	Bounce LEDs, avoid glare, keep exposures consistent. Minor unevenness okay.	FADGI uniformity metric; small deviations won’t hurt archival quality.
Geometric / Warping	Minimize distortion	Support fragile items; document warping in metadata.	Geometric accuracy metric; unavoidable for damaged objects.
Color Accuracy	Reasonable reproduction	Neutral RAW white balance, embedded ICC profile; consistent lighting. Don’t chase ΔE decimals for office displays.	ΔE / color metric—ensures archival truth, even if viewers see slightly different colors.

TL;DR:

You’re already doing 90% of what matters.
FADGI’s obsessive numbers mostly come into play when comparing equipment or aiming for “perfect” 4-star scans.
The tweaks that actually improve archival quality in your workflow are: aperture, exposure consistency, focus check on corners, and minimizing vibration. Everything else (noise, tiny ΔE, Nyquist SFR) is academic.

I can also make a visual one-page diagram of this workflow, showing where each tweak matters for FADGI metrics—it’s handy for quick reference while scanning.

Do you want me to make that visual version?

Perfect. Here’s a comprehensive, evidence-based “Confidence Checklist” for copy-stand imaging with your A7R V, tied to FADGI metrics but focused on practical relevance rather than academic perfection. You can run through this mentally or jot it on a sticky to calm the “Am I doing this right?” anxiety.

Confidence Checklist: Practical FADGI-Aligned Imaging

Category	What to Check	Evidence You’re Good	Notes / Tricks
Sensor Resolution / Detail	RAW files at full L-size	Uncompressed RAW, 61 MP, exporting at 4400 ppi for high-detail scans	Higher ppi in export doesn’t increase sensor detail; your capture already maximizes it.
Aperture / Sharpness	f/8–f/11 used	Edges slightly soft at extreme zoom, center razor-sharp	Field curvature is normal; avoid f/2.8 (soft edges) and f/16+ (diffraction).
ISO / Noise	ISO 160 (negs) / ISO 400 (prints)	Histograms show full dynamic range, shadows not crushed	Only tweak ISO if extreme under/overexposure occurs; otherwise noise is negligible.
Exposure / Tonality	Histogram shows no clipping	Shadows and highlights contain detail; RAW allows adjustment	You’re effectively covering FADGI’s OECF expectations without table measurements.
Shutter / Stability	Tethered capture via Capture One	Trackpad-only shutter; tripod/copy stand stable	Micro-vibrations minimized; vibration metric covered.
Focus Accuracy	Manual or AF, check corners	100% zoom shows center sharp; edges slightly soft but acceptable	Edge softness is normal macro behavior; focus method doesn’t matter much here.
Illumination / Uniformity	Even lighting across frame	Bounced LEDs avoid glare; slight unevenness okay	FADGI % uniformity minor deviations; diffused lighting sufficient.
Color Accuracy / White Balance	Neutral RAW WB, consistent ICC profile	Color checker confirms approximate accuracy; ΔE small, visually acceptable	Office displays will vary; perfection only matters for archival truth.
Geometric / Warping	Flatness & alignment	Fragile items supported; warped items documented	FADGI expects flat objects; real-world deviations unavoidable—capture as-is.
Artifacts / Noise / Sharpening	No over-sharpening or hot/dead pixels	RAW retains sensor fidelity; post-processing controlled	Don’t chase theoretical noise or SFR; only remove glaring defects.
Capture Workflow Consistency	Same settings applied across session	ISO, aperture, shutter, lighting, focus method consistent	FADGI favors reproducibility; you’ve standardized your setup.
Output / PPI / DPI	4400 ppi export for high-detail, 1200 ppi for reference	Pixel data intact; no real loss of detail	PPI only affects display/print scaling, not sensor capture.
Metadata / Documentation	Exposure, capture method, object ID, notes on warping	Ensures traceability and reproducibility	FADGI assumes documentation; this is cheap “insurance” for audit or future use.
Practical Review	Quick visual check of 100% zoom corners	No major detail loss; edges within expected sharpness	Visual inspection often tells more than numbers for real-world use.

Key Takeaways / Mental Reassurance

You’re already hitting the practical FADGI goals: detail, exposure, color, illumination, and reproducibility.
Obsessing over ΔE, SFR, micro-illumination percentages, or Nyquist tables is academic at this stage.
Small imperfections (slightly soft edges, minor uneven light) are normal and acceptable for archival imaging of heritage materials.
Document what you can: it increases confidence for audits or your counterpart without slowing workflow.
Trust the process: if RAW, proper exposure, consistent aperture/ISO, stable lighting, and careful handling are covered, you’re already in “archive-grade” territory.

If you like, I can also make a super-condensed “scan sanity one-liner” version—basically 5–6 things you can glance at in 30 seconds per item and instantly know the scan is solid. It’s basically like a cheat sheet you can tape next to your laptop for every session.

Do you want me to make that too?