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 Photo strategy
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| Dima DD |
Posted on 05-10-2007 21:00
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 Member Location: St.Petersburg, Russia Posts: 75 Joined: 28.11.05 |
Tony T wrote: 4 October 2007, NB, Canada. Keys to Calliphora vicina Just a comparison of techniques. Top photo is an image from a flatbed scanner, lower one from a digital camera. Scanner gives quite a good image but lacks the depth of field that can be obtained with a camera. Scanning may be a good alternative technique. Many images in the "Atlas of Russian beetles" (Zoological institute RAS, SPb, here is their great coleopterological site) are taken by scanning, e.g. these very large stag-beetles. DOF depends on the scanner type (CIS-scanners has tiny DOF, CCD-scanners - large DOF) and on concrete model, too... |
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| cosmln |
Posted on 05-10-2007 21:08
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 Member Location: Romania Posts: 956 Joined: 18.03.07 |
Dima DD wrote: Tony T wrote: 4 October 2007, NB, Canada. Keys to Calliphora vicina Just a comparison of techniques. Top photo is an image from a flatbed scanner, lower one from a digital camera. Scanner gives quite a good image but lacks the depth of field that can be obtained with a camera. Scanning may be a good alternative technique. Many images in the "Atlas of Russian beetles" (Zoological institute RAS, SPb, here is their great coleopterological site) are taken by scanning, e.g. these very large stag-beetles. DOF depends on the scanner type (CIS-scanners has tiny DOF, CCD-scanners - large DOF) and on concrete model, too... scanning is also very good for dragonflies (i used that many times)... and also for plants. this was before to have a photo camera, anywai in many case scanning is a very good alternative |
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| Tony T |
Posted on 05-10-2007 21:49
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 Member Location: New Brunswick, Canada Posts: 662 Joined: 08.02.07 |
conopid wrote: Catch them, take them home, chill them in the fridge - not too long though, then photograph on a flower or leaf as quickly as possible, before they warm up and fly away. Otherwise hunt, stalk and shoot is the best way....  You mean like your photos HERE  |
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| crex |
Posted on 05-10-2007 23:25
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 Member Location: Sweden Posts: 1996 Joined: 22.05.06 |
How do you get the white background and no shadows from the lid? Maybe a bit of white paper? If you put the lid on, the fly gets smashed, wouldn't it? One should probably use as high resolution as the scanner can handle, but I still wonder what dpi you used for this particular scanning, Tony? |
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| Tony T |
Posted on 06-10-2007 01:55
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Member Location: New Brunswick, Canada Posts: 662 Joined: 08.02.07 |
cosmln wrote: scanning is also very good for dragonflies (i used that many times)... and also for plants. this was before to have a photo camera, anywai in many case scanning is a very good alternative I agree, does an excellent job with Odonates. Also excellent for 'flat' flies such as syrphids and most tabanids, particularly Chrysops. This calliphorid has a large somewhat rounded thorax making the fly very deep and thus could not get everything in focus. It was scanned at 3600 ppi (pixels per inch). I simply removed the scanner lid; placed 4 blocks of wood on the glass plate of the scanner and placed a sheet of white card on the blocks. The blocks are 1 cm thick. The fly, of course, was placed upside down on the glass plate of the scanner. Alternatively one could support the scanner lid about 1 cm above the glass plate using blocks |
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