shooting 1:1 scale of a 1m by 2m object

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extremeexposure

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I have a brief to shoot 1 meter by 2 meter pieces of marble but 1:1 scale, with a dpi of about 3400 shooting on a medium format. I am trying to figure out the equation for 1:1 scale in regards to sensor size and object size. Sensor size is around 72 by 48, so I'm wondering how to get 1:1 scale from a 1 meter by 2 meter object and the kind of distance between the two and what lens would be best to use. I think the concept would be to take multiple photos and piece them together like a jigsaw to get a higher resolution but was also wondering if their was a specialised technique of doing this?

Any advice that you can suggest to me would be very much appreciated.
 
1:1 is the important bit there I assume for working out number of shots etc, not the dpi (that is going to be more to do with your output not your input)

that's going to take a while!

assuming your 72 by 48 is mm then you'll need to take 28 shots along the long axis (2000/72) and 21 shots along the short axis (1000/48)

that's 588 shots before you start to overlap to allow stitching - I allow about 25% for overlap so that would in reality be more like 37 along the long side, 28 along the short for a total of 1036 photos
 
extremeexposure said:
I have a brief to shoot 1 meter by 2 meter pieces of marble but 1:1 scale, with a dpi of about 3400 shooting on a medium format.
Click to expand...

Get the person who wrote the brief to re-write it.

1 meter = 39.37 inches. So at 3400 dpi your image will have to be 134,000 x 268,000 pixels. That's roughly 36,000 megapixels.

Do they REALLY mean that? A slab of marble the size of a table or a door, photographed to show details much smaller than the width of a human hair? REALLY?
 
Or do they simply want a 1:1 print?
Because, you know, that sounds doable.

(You'd need some kind of cinematic track/rail to do the stitching technique... sounds like a PAIN.)
 
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StewartR said:
Get the person who wrote the brief to re-write it.

1 meter = 39.37 inches. So at 3400 dpi your image will have to be 134,000 x 268,000 pixels. That's roughly 36,000 megapixels.

Do they REALLY mean that? A slab of marble the size of a table or a door, photographed to show details much smaller than the width of a human hair? REALLY?
Click to expand...

^^^Like Stewart says.

To OP, none of the numbers you have given stacks up as stated.

And welcome to TP :)
 
Ulfric M Douglas said:
Or do they simply want a 1:1 print?
Because, you know, that sounds doable.

(You'd need some kind of cinematic track/rail to do the stitching technique... sounds like a PAIN.)
Click to expand...

Sounds more like it.
 
3400dpi : I haven't a clue. do printers do those kinds of numbers?
Surely dpi is a printer measurement, so ... maybe NASA or the elves have some new tech?
 
Ulfric M Douglas said:
3400dpi : I haven't a clue. do printers do those kinds of numbers?
Click to expand...

No.

But even if they did, that resolution is about 10x what the human eye could achieve, so you'd need a magnifying glass or microscope to look at it properly.

And it would still be 36,000 megapixels.
 
I was going to say the same - do they not just want a 2m x 1m (life size) image producing ?
 
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