Kenko Teleplus PRO300 DG 2X Teleconverter:

 

 

Using the teleconverter with the Canon L series lenses, the Exif information included in the picture contains the correct focal length, with other lenses it contains the focal length of the lens only.

A two power teleconverter doubles the focal length of a lens while retaining the minimum focusing distance so it improves the macro/close-up performance of a lens.

2006-06-10-12-03-08-IMG_1494.jpg
Canon EF 28-135 mm f/3.5-5.6 IS USM,
1/200, f/7.1, ISO: 1600,
length 135 mm without teleconverter,
hand-held using available light
 
2006-06-10-12-02-06-IMG_1492.jpg
Canon EF 28-135 mm f/3.5-5.6 IS USM,
1/60, f/5.6, ISO: 1600,
length 270 mm with teleconverter,
hand-held using available light
 
2006-06-10-11-52-30-IMG_1481.jpg
Canon EF 70-200mm f/4L USM,
1/400, f/8, ISO: 1600,
length 172mm without teleconverter,
corner of a box, hand-held using available light in a store.        
 
2006-06-10-11-51-34-IMG_1480.jpg
Canon EF 70-200mm f/4L USM,
1/200, f/8, ISO: 1600,
length 236mm incl. teleconverter,
corner of a box, hand-held using available light in a store.
 

 

2006-06-10-11-59-06-IMG_1490.jpg
Canon EF 100-400mm f/4.5-5.6L IS USM,
1/2000, f/16, ISO: 1600,
length 400mm without teleconverter,
hand-held outdoors at noon.
 
 
2006-06-10-11-58-02-IMG_1486.jpg
Canon EF 100-400mm f/4.5-5.6L IS USM,
1/1000, f/20, ISO: 1600,
length 800mm incl. teleconverter,
hand-held outdoors at noon.
The spots are dust on the sensor.
 

 

I briefly had an appartment on the seventeenth floor. From the balcony there was a clear view of a MacDonald's restaurant a full city block to the west.

2007-10-19-14-02-10-IMG_9376_10.jpg
This is the overall view from the camera's location
to aid orientation
 
 

This is a 100% crop from the
400 mm + teleconverter image below,
it is over a city block away!
 
2007-10-19-13-44-24-IMG_9366_150.jpg
Sigma 150 mm Macro lens without a teleconverter
 
 
2007-10-19-13-43-10-IMG_9365_150_2x.jpg
Sigma 150 mm Macro lens with teleconverter
In this picture someone is using the phone.
 
2007-10-19-13-50-54-IMG_9370_400.jpg
Canon EF 100-400mm f/4.5-5.6L IS USM,
without teleconverter
 
2007-10-19-13-53-10-IMG_9372_400_2x.jpg
Canon EF 100-400mm f/4.5-5.6L IS USM,
with teleconverter, expand this to see the phone
 

 

This is a fairly extreme example. The Nikon CoolPIX 5700 is a 5 Megapixel camera, the Nikon CoolPIX 8800 is 8 Megapixels as is the Canon 30D. The Canon with zoom lens and teleconverter is much larger, heavier and more expensive. The Canon has a much larger sensor with larger photo diodes, too. In the thumbnail images, there does not seem to be much difference between the images. Expand the images to their full size and look at the antennas on top of the BMO building which are about 16.5 Km or 10.4 miles from the camera. The cables supporting the antenna are pretty thick, probably similar in diameter to the ones used to support utility poles on the street. The CN Tower is about a kilometer further away.

2006-06-12-19-50-30-DSCN9047.jpg

Nikon COOLPIX 5700, 1/75, f/4.2, ISO: 100, 284.8mm optical, 4.0 digital zoom (4 * 71.2 = 284.8mm)

 

2006-06-12-19-48-46-DSCN3662.jpg

Nikon COOLPIX 8800, 1/28, f/5.2, ISO: Auto, 356mm optical, 4.0 digital zoom (89 * 4 = 356mm)

 

2006-06-12-21-02-20-IMG_1802.jpg

Canon OES 30D, Canon EF 100-400mm f/4.5-5.6L IS USM, Kenko Teleplus PRO300 DG 2X, 1/30, f/11, ISO: 1000, 800mm optical, 2X teleconverter (400 * 2 = 800mm)

 

 

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