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Author Topic: Scan of small objects using Macro lens  (Read 4391 times)

jeancampos

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Scan of small objects using Macro lens
« on: August 18, 2013, 06:39:37 AM »
Hello Guys

A while ago, I did some testing with Agisoft using a macro lens low cost in my Canon 60D to shoot a seed CASHEW (fruit typical of Brazil), the object in question here does not have more than 4 cm in size, an object too small to photograph without using a lens adapted to it. Below the  used adapter Macro.

http://www.ebay.com/itm/RAYNOX-DCR-250-Super-Macro-Conversion-CLOSE-UP-LENS-52mm-55mm-58mm-67mm-map-/130741876563?pt=Camera_Lenses&hash=item1e70d2b753

Whereas photographed using only one camera and circling the objects, just to experiment, I was amazed with the result .

http://d.pr/i/tol1

http://d.pr/i/yri

http://d.pr/i/YrrK

http://d.pr/i/n43O

http://d.pr/i/YrN6

The results are far to apply for work, and is difficult to control focus also, as today we have a RIG of 13 cameras, I'm tempted to invest in new adapters for lens for these cameras, so you can use to capture small models, as for example strawberries.

And here the angle that the photos were taken:

http://d.pr/i/A5qz

My question is if I invest in a better lens, is it really going to achieve satisfactory results after this investment, considering that 13 macro lens good quality, can cost a lot of money.

Anyone here ever had a similar experience, and like to share?

All the best

Jean Campos



aphextwin

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Re: Scan of small objects using Macro lens
« Reply #1 on: August 18, 2013, 10:32:11 AM »
Imho a camera-rig for macro-SfM is a waste of money as you're to set focus etc on every camera manually.  What is your aperture?

I'd recommend you to play around with aperture/shutter and let iso be the lowest as possible. Don?t forget to not take much higher apertures than about f/13. But anyways, with the Canon standard macro (60mm I guess, connected to a eos 600D) I got very nice results even at higher apertures. With my eos 5D Mark III I had dof-issues.

are you interested in samples of small items (about 1cm)? I could upload a sample animation.

I think that the noise that non-sharp images gives you is far beyond what higher apertures do to your results. But that's only my oppinion.