Scanography

Have questions about the equipment used for macro- or micro- photography? Post those questions in this forum.

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Harold Gough
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Location: Reading, Berkshire, England

Scanography

Post by Harold Gough »

My images are a medium for sharing some of my experiences: they are not me.

rjlittlefield
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Post by rjlittlefield »


Graham Stabler
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Location: Swindon, UK

Post by Graham Stabler »

Charles suggested constructing a wide format stacking system. Basically remove glass and lower specimen towards the scanning bar.

Graham

rjlittlefield
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Post by rjlittlefield »

Graham Stabler wrote:Basically remove glass and lower specimen towards the scanning bar.
Yes, that was discussed in http://www.photomacrography.net/forum/v ... ht=scanner, starting at post #11. (The bulk of that topic addresses telecentric optics.)

--Rik

NikonUser
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Location: southern New Brunswick, Canada

Post by NikonUser »

Flatbed scanners are excellent for documenting 2-dimensional objects, or 3-dimensional objects with small depth. I have used them extensively to get dorsal and lateral images of dragonflies as in Rik's references. Certainly a lot quicker than using a camera.
However, I have never found the resolution to be as good as that obtained from a camera/lens system.
The resampled image below (top image) is from a scan of a noctuid moth (Syngrapha octoscripta) from a Microtek flatbed, scanned at the maximum 7,200 dpi. It gave a 74MB file with dimensions 5,232 x 4,944 pixels. The actual scan took less than 1 minute.
This resampled 800 px wide image gave excellent detail of the wing pattern. For this level of macro work flatbeds are ideal.
The lower image is an 800 x 800 px crop from the original scan. Unacceptable.
Image

Image
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives

Cyclops
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Post by Cyclops »

Yea i've mucked about with a scanner in the past,great fun. Now I wonder what megapixel count they have. After all it is basically a digital camera!
Canon 5D and 30D | Canon IXUS 265HS | Cosina 100mm f3.5 macro | EF 75-300 f4.5-5.6 USM III | EF 50 f1.8 II | Slik 88 tripod | Apex Practicioner monocular microscope

NikonUser
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Location: southern New Brunswick, Canada

Post by NikonUser »

Cyclops wrote: Now I wonder what megapixel count they have. After all it is basically a digital camera!
This is a question for the bean counters.
It seems to me that the count can be what ever you want it to be.

Scanning a 1x1" object (actually 0.973x1.025") on my scanner @ 7,200 dpi gave an image that Photoshop says is 7,008 x 7,381 pixels.

With a 2x2" image (2.035" x 2.033") @ 7,200 dpi gave an image 14,654 x 14,636 pixels.

A standard flatbed scanner is 8 x 10".
This is where the bean counter is needed.
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives

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