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Additional information relating to Canon Speedlite 420EZ |
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Type: Energy-saving, automatic, electronic flash unit using A-TTL metering system to measure light reflected from the film surface. Clip-on type with directly coupled contacts. For exclusive use with EOS cameras.
Guide Number Table (at ISO 100):
| Zoom position (mm) | 24 | 28 | 35 | 50 | 70 | 80 | |
| Normal flash | 25(83) | 27(90) | 30(100) | 35(116) | 40(133) | 42(140) | |
| Rapid Fire Flash |
1/2 to 1/16 of that for normal flash |
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| Manual Flash Also refer table below |
1/1 | 25 83) | 27(90) | 30(100) | 35(116) | 40(133) | 42(140) |
| 1/2 | 17.7 (59) | 19.1(63) | 21.2 (70) | 24.7 (82) | 28.3 (94) | 29.7 (99) | |
| 1/4 | 12.5 (41) | 13.5 (45) | 15 (50) | 17.5 (58) | 20 (66) | 21 (70) | |
| 1/8 | 8.8 (29) | 9.5 (31) | 10.6 (35) | 12.4 (41) | 14 (47) | 14.8 (49) | |
| 1/16 | 6.3 (21) | 6.8 (23) | 7.5 (25) | 8.8 (29) | 10 (33) | 10.5 (35) | |
| 1/32 | 4.4 (14) | 4.8 (16) | 5.3 (17) | 6.2 (20) | 7.1 (23) | 7.4 (24) | |
Note: (The above figures in parentheses indicate the guide numbers in feet at ISO 100.) Flash Coverage Angle: Covers more than the fields of view of 24mm, 28mm, 35mm, 50mm, 70mm and 80mm using auto internal zoom mechanism. Manual switch over possible.
Recycling Time:
| Alkaline | Ni-Cd | |
| Normal flash | approx. 0.2 to 13 sec | approx. 0. 2 to 6.5 sec |
| Rapid-fire flash | approx. 0.2 to 1.5 sec | approx. 0.2 to 1 .5 sec |
Based on the interval between flash firing and pilot lamp relighting with new alkaline or fully charged Ni-Cd batteries. (Figures on the left in each column show recycling time for A-TTL mode, and on the right for Manual 1/1 mode.
Number of Flashes:
| . | Alkaline | Ni-Cd |
| Normal flash | approx. 100 to 2000 | approx. 45 to 300 |
Based on flash firing at 30 sec intervals with new alkaline or fully-charged Ni-Cd batteries. (The figures on the left in each column show flashes for Manual ill mode, and on the right for A-TTL mode.)
Flash Duration: 1.5 msec or less
X-sync Shutter Speed:
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Flash Control System:
TTL series control system with preflash function. Flash Exposure Level Control: A maximum of 1.5 BV steps in the A-TTL mode when subject brightness is more than BV5 according to the camera's metering system. Film Speed Setting: Automatically set by the camera. Automatic Shooting Distance Range: |
A-TTL normal flash approx., 0.7 to 21 m (2.3 to 68.8 ft.)
A-TTL rapid-fire flash (min.) approx. 0.7 to S m (2.3 to 16.4 ft.)
A-TTL rapid-fire flash (max.) approx. 0,7 to 16 m (2.3 to 52 4 ft.)
Based on EF 50mm f/1.8 lens at ISO 100. (The automatic shooting distance range extends according to film speed.)
Out-of -Coupling Range Warning: If subject is too far away, the shutter speed and the aperture value blink in the viewfinder at the first stroke of the shutter button. if subject is too close, the distance display blinks.
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Bounce Angle: Upward - 0-90° (click-stop positions at 0, 60, 75, 90) |
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Power Source: Four size-AA (LR6) alkaline or Ni-Cd batteries. Carbon-zinc batteries may also be used. |
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Flash Photography:- Index Page Part | 2 | 3 | 4 - Canon 540EZ site |
Background and Various
Issues
| The Basic
Features
& various Setup | Manual & Auto Focusing | Metering
Systems
| Exposure
Control
| Viewfinder
optical System
| Flash
Photography
(with Speedlite
540EZ
extension) Reliability Issues:- Body Chassis | Shutter Unit | Electronic Circuitry | Film Transport & film
handling
Secondary Functions:- Custom Function System Accessories:-
Film
Back
Options | Macro/Close Up| Power Sources - BP-E1 | PDB-E1 | Focusing Screens| Remote Control|
System
compatibility
Canon EOS-1N - Variants Canon EOS-1N RS | Canon/Kodak Digital
DCS-1, 3 -5 & 520/560 Series
(includes Canon D2000 - Instruction Manual links provided) Full Technical
Specification
| Main
Reference Map
/ Nomenclature
Resource Centre:-
Comparative Charts between EOS-1 & EOS-1N / or with its
active Competition(s) (Nikon); Quick
Operational Reference
Card (278k Gif File); Listings
of 7-segment
digital numbers/letters
appeared on LCD display panel/viewfinders (HTML page); External Link:-Instruction Manual (3.3MB PDF file applicable
for both Canon EOS-1N (RS)
The Eyes of EOS - EF Lenses
A little OFF-TOPIC SOME Personal Thought
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