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21 Aug, 2019
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File:Natal Long-fingered Bats (Miniopterus Natalensis) In Flight (48966808522).jpg

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They look transparent because of the long exposure, where some of the pixels from the background are superimposed on the bat image. This was done with a bank of 6 flashes triggered by laser sensors. The camera is on bulb (manually holding the shutter open), and preset to ISO 1200 and F16. The best images are obtained by closing the shutter as soon as the flash is triggered. I wish I could do this again now, with what I learned last night! Thanks to Gert de Beer for the invitation, and Ernest Seamark from African Bats (<a href="http://www.africanbats.org" rel="noreferrer nofollow">www.africanbats.org</a>) for the opportunity to use their research facility. Thanks also to Gordon from Horizons Leisure and Learning Sanctuary for the use of the facilities, the property where the bat cave is located, and the great braai afterwards. Date 26 October 2019, 18:39 Source Natal long-fingered bats (Miniopterus natalensis) in flight Author Derek Keats from Johannesburg, South Africa

Camera location	25° 49′ 43.95″ S, 27° 59′ 22.15″ E	View this and other nearby images on: OpenStreetMap	-25.828875; 27.989486

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This image was originally posted to Flickr by Derek Keats at https://flickr.com/photos/93242958@N00/48966808522. It was reviewed on 27 August 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

27 August 2021

	Date/Time	Thumbnail	Dimensions	User	Comment
current	15:39, 27 August 2021		2,647 × 3,169 (5.01 MB)	Awkwafaba	Transferred from Flickr via #flickr2commons

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current

15:39, 27 August 2021

2,647 × 3,169 (5.01 MB)

Awkwafaba

Transferred from Flickr via #flickr2commons

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Image title	They look transparent because of the long exposure, where some of the pixels from the background are superimposed on the bat image. This was done with a bank of 6 flashes triggered by laser sensors. The camera is on bulb (manually holding the shutter open), and preset to ISO 1200 and F16. The best images are obtained by closing the shutter as soon as the flash is triggered. I wish I could do this again now, with what I learned last night! Thanks to Gert de Beer for the invitation, and Ernest Seamark from African Bats (www.africanbats.org) for the opportunity to use their research facility. Thanks also to Gordon from Horizons Leisure and Learning Sanctuary for the use of the facilities, the property where the bat cave is located, and the great braai afterwards.
Camera manufacturer	Canon
Camera model	Canon EOS 7D Mark II
Exposure time	196/5 sec (39.2)
F-number	f/16
ISO speed rating	1,250
Date and time of data generation	18:39, 26 October 2019
Lens focal length	70 mm
User comments	They look transparent because of the long exposure, where some of the pixels from the background are superimposed on the bat image. This was done with a bank of 6 flashes triggered by laser sensors. The camera is on bulb (manually holding the shutter open), and preset to ISO 1200 and F16. The best images are obtained by closing the shutter as soon as the flash is triggered. I wish I could do this again now, with what I learned last night! Thanks to Gert de Beer for the invitation, and Ernest Seamark from African Bats (www.africanbats.org) for the opportunity to use their research facility. Thanks also to Gordon from Horizons Leisure and Learning Sanctuary for the use of the facilities, the property where the bat cave is located, and the great braai afterwards.
Latitude	25° 49′ 43.95″ S
Longitude	27° 59′ 22.15″ E
Altitude	1,260 meters above sea level
Short title	isiXhosa: Natal long-fingered bats (Miniopterus natalensis) in flight
JPEG file comment	They look transparent because of the long exposure, where some of the pixels from the background are superimposed on the bat image. This was done with a bank of 6 flashes triggered by laser sensors. The camera is on bulb (manually holding the shutter open), and preset to ISO 1200 and F16. The best images are obtained by closing the shutter as soon as the flash is triggered. I wish I could do this again now, with what I learned last night! Thanks to Gert de Beer for the invitation, and Ernest Seamark from African Bats (www.africanbats.org) for the opportunity to use their research facility. Thanks also to Gordon from Horizons Leisure and Learning Sanctuary for the use of the facilities, the property where the bat cave is located, and the great braai afterwards.
Orientation	Normal
Horizontal resolution	300 dpi
Vertical resolution	300 dpi
Software used	darktable 2.6.2
File change date and time	09:41, 27 October 2019
Exposure Program	9
Exif version	2.3
Date and time of digitizing	18:39, 26 October 2019
Meaning of each component	Y Cb Cr does not exist
Shutter speed	−2,147,483,648
APEX aperture	8
Exposure bias	0
Metering mode	Pattern
Flash	Flash did not fire, compulsory flash suppression
DateTime subseconds	04
DateTimeOriginal subseconds	04
DateTimeDigitized subseconds	04
Supported Flashpix version	1
Color space	sRGB
Focal plane X resolution	6,086.7630700779
Focal plane Y resolution	6,090.1502504174
Focal plane resolution unit	inches
Custom image processing	Normal process
Exposure mode	Auto exposure
White balance	Auto white balance
Scene capture type	Standard
GPS time (atomic clock)	16:56:46.905
Satellites used for measurement	16
Receiver status	Measurement in progress
Measurement mode	3-dimensional measurement
Measurement precision	Poor (3.5)
Reference for direction of image	Magnetic direction
Geodetic survey data used	WGS-84
GPS date	26 October 2019
GPS tag version	0.0.2.2
Rating (out of 5)	1
Keywords	Miniopterus natalensis taxonomy:family=Miniopteridae nightime Natal long-fingered bats after dark nightphoto bats taxonomy:binomial=Miniopterus natalensis Chiroptera South Africa nocturnal bat Gauteng

File:Natal Long-fingered Bats (Miniopterus Natalensis) In Flight (48966808522).jpg

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26 October 2019

25°49'43.950"S, 27°59'22.150"E

39.2 second

16

70 millimetre

1,250

image/jpeg

5,248,226 byte

3,169 pixel

2,647 pixel

9e7fa94769a64bbeb4a0fb4cc3cfcd089ce88fa5

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