Who is here? 1 guest(s)
Page 2 of 2: 12
|
 Photo strategy
|
|
| Dima DD |
Posted on 05-10-2007 20:00
|
 Member Location: 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... |
 |
|
| cosmln |
Posted on 05-10-2007 20:08
|
 Member Location: 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 |
|
|
|
| Tony T |
Posted on 05-10-2007 20:49
|
 Member Location: Posts: 661 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  |
|
|
|
| crex |
Posted on 05-10-2007 22:25
|
 Member Location: 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? |
|
|
|
| Tony T |
Posted on 06-10-2007 00:55
|
|
Member Location: Posts: 661 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 |
|
|
|
Page 2 of 2: 12
| Jump to Forum: |
but don't see the image in the post.
