How should I set up an overhead camera to photograph large flat manuscripts clearly?
Asked 3/16/2021
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2 answers
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I need to photograph large flat documents/manuscripts from directly above because they cannot be mounted vertically. The pages are about 130 × 90 cm and must stay flat on a table. The camera would be mounted roughly 1.5 m above the surface, and I need enough image quality to read faint pencil notes on old paper.
What matters most for this kind of copy setup: camera, lens, lighting, and mounting? Is a mirrorless camera suitable, and what lens characteristics should I look for to keep distortion low and sharpness even across the frame?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
5y ago
2 Answers
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I have had to do exactly what you are attempting. Although the documents I was imaging were not quite as large. 80cm x 60cm or so. The problem you will run into is one of getting all the detail in one shot. I took several overlapping photos methodically from upper left moving to the right in as many rows as needed. Mine were old handwritten taped together pages of a family tree we were trying to preserve. Hopefully your documents are single layers and there won't be tape stains, offsets, mismatches, hard to read folds etc. I took the individual images and stitched them back together in PS. The results were acceptable. If you have a large number to try this on I would highly suggest building a platform, well lit with rails running above it that you can slide your camera along while keeping the same height. Reducing the amount of work you will need to do later. Fine writing in pencil is hard to capture from 1.5 meters away. As far as the focus and gravity, a little blue painters tape or a wide rubber band works. Check on youtube for large document scanning. Plenty of good examples. I would have built my own but I only had a few to capture. Good Luck!! Jeff
Originally by user98090. Source · Licensed CC BY-SA 4.0
user98090
5y ago
0
Generated from our catalog & community — verify before relying on it.
For this job, the setup matters more than any specific camera body. The key priorities are:
- even, high-quality lighting
- camera perfectly parallel to the table
- low distortion and high edge-to-edge sharpness
- stable mounting and easy remote control
A mirrorless camera can work well, especially if it supports tethered control from a computer and external AC power so you don’t have to touch a ceiling-mounted camera or swap batteries.
For the lens, use a prime macro lens, ideally the longest focal length you can fit in the available height. That helps reduce geometric distortion and maintain sharpness across the frame. Autofocus can also help if you’re concerned about focus drift.
For alignment, a rigid overhead rig is better than improvising with a normal tripod head. A goal-post style support or rail system makes it easier to keep the camera square to the document and move it methodically if needed. A mirror placed on the table can help you align the camera so it is exactly parallel to the surface.
Also, one shot may not capture enough detail for faint writing on a document that large. Taking multiple overlapping images and stitching them later is often the best solution.
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