File:20100306 204728 Euglena.jpg
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Summary
I'd been seeing these teardrop-shaped protists for quite some time, and didn't really know what they are. They usually are very fast-moving, making it difficult for me to see much detail. This one may have been ill or injured in some way; it was quite slow-moving compared to others of its kind, and somewhat browner (not quite as green) than others. This afforded me the opportunity to see it in better detail than I've been able to see before. One thing that doesn't show in any of my still pictures — but which quickly caught my attention — was a rapid movement near the round-end, which I recognized as that of a flagellum. My impression was that this flagellum was somewhat tangled, and perhaps this is what prevented this critter from moving as fast as others of its kind. You can see a video of this here on YouTube. I'd not before been able to see this on others of this kind, and on seeing it, I now know this to be a flagellate of some sort, very likely a Euglena. Doing a Google Image search on “Euglena” seems to have confirmed this, as there are a number of other images, identified as Euglena, of creatures that look very much like this one.
This picture was taken through a microscope that I inherited from my father, using the 60× objective and the 15× eyepiece. The numbered scale that you see in the image is built into the 15× eyepiece, and when used with the 60× objective, the numbered ticks on this scale are 20 µM apart. I took this picture by pointing a cheap digital camera into the eyepiece of the microscope.
Description20100306 204728 Euglena.jpg |
English: A Euglena. |
Date | (UTC) |
Source | Own work (Original text: I (Bob Blaylock (talk)) created this work entirely by myself.) |
Author | Bob Blaylock (talk) |
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Original upload log
Transferred from en.wikipedia to Commons by Gikü using CommonsHelper.
- 2010-03-14 00:41 Bob Blaylock 1187×1920× (196636 bytes) {{Information |Description = A Euglena. |Source = I (~~~) created this work entirely by myself. |Date = ~~~~~ |Author = ~~~ |Objective = 60x |Eyepiece = 15x |PixelSize = 0.067 uM |NumberedTick = 20 uM }}
Captions
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depicts
14 March 2010
image/jpeg
ea0efda443bb2a7e3c1f3f0f2a47ec5f25326f61
196,636 byte
1,920 pixel
1,187 pixel
0.05 second
3.2
312
7.58 millimetre
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:49, 10 November 2013 | ![]() | 1,187 × 1,920 (192 KB) | File Upload Bot (Magnus Manske) | Transfered from en.wikipedia by User:Gikü using CommonsHelper |
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Metadata
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Camera manufacturer | ADPK |
---|---|
Camera model | CD500D4 |
Author | Bob Blaylock |
Exposure time | 1/20 sec (0.05) |
F-number | f/3.2 |
ISO speed rating | 312 |
Date and time of data generation | 20:47, 6 March 2010 |
Lens focal length | 7.58 mm |
Online copyright statement | http://tinyurl.com/BobsMicroscopy |
Image title |
|
Short title |
|
Orientation | Normal |
Horizontal resolution | 379 dpi |
Vertical resolution | 379 dpi |
Software used | Adobe Photoshop 7.0 |
File change date and time | 16:40, 13 March 2010 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 20:47, 6 March 2010 |
Meaning of each component |
|
Shutter speed | 4.3 |
APEX aperture | 3.2 |
Exposure bias | −1 |
Maximum land aperture | 3.2 APEX (f/3.03) |
Metering mode | Center weighted average |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Scene capture type | Standard |
Sharpness | Normal |
Writer | Bob Blaylock |
Copyright status | Copyrighted |
Keywords |
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IIM version | 2 |