Skate + BMX photographer's flash specs
Send corrections or additions to joe@joesmalley.com

Updated 16 July 08 - Added Nikon SB-600, SB-800
Make Model Weight(gr w/o battery) No of AA's Mount GN(m) @ 100iso (full power) Flash Durations Notes Refs
    Shoe Handle 14mm 17mm 18mm 20mm 24mm 28mm 35mm 50mm 70mm 80mm 85mm 105mm Full 1/2 1/4 1/8 1/16 1/32 1/64

1/128

   
Canon 420ez 350 4 x           25 27 30 35 40 42                     Makes a rubbish slave - turns itself off after 5 mins (and no override) http://www.kjsl.com/%7Edave/speedlites.html
Canon 420ex 300 4 x           23 25 31 34 37     42                 Makes a rubbish slave - turns itself off after 90 sec (and no override) http://www.kjsl.com/%7Edave/speedlites.html
Canon 430ez 365 4 x           25 27 30 35 40 43                     Makes a rubbish slave - turns itself off after 90 sec (and no override) http://www.kjsl.com/%7Edave/speedlites.html
Canon 430ex 330 4 x   11       25 27 31 34 37 40                       http://www.kjsl.com/%7Edave/speedlites.html
Canon 540ez 405 4 x       16   28 30 36 42 46 50   54 1/833                 http://www.kjsl.com/%7Edave/speedlites.html
Canon 550ex 405 4 x     15     28 30 36 42 46 50     1/833                 http://www.kjsl.com/%7Edave/speedlites.html
Canon 580ex 375 4 x   15       28 30 36 42 46 50     1/833       ~1/15000 ~1/19000 ~1/31000     http://www.waynesthisandthat.com/flashdurations.html
Canon 480eg 1065 -   x       24   48             1/850                  
Metz  45-CL1 680 6   x             45                            
Metz  45-CL4 680 6   x             45           1/300 1/1000 1/2500              
Metz  60 CT-4 650 -   x           60             1/200 1/300 1/800 1/1500 1/2500 1/4000 1/5500   Requires external battery pack
Nikon SB-25     x               36           1/1000                  
Nikon SB-26 380
4
x
20 30 32 36 42 48 50 1/1000 1/1100 1/2500 1/5000 1/8700 1/12000 1/23000   Info from David Weston
Nikon SB-600 300
4
x
  14       26 28 30 36 38   40   1/900 1/1600 1/3400 1/6600 1/11100 1/20000 1/25000     Info from Jonas Magnusson
Nikon SB-800 350
4
x
17 30 32 38 44 50 53 56 1/1050 1/1100 1/2700 1/5900 1/10900 1/17800 1/32300 1/41600   Info from David Weston
Quantum Qflash T2 880 - x x             50           1/300 1/700 1/1300 1/2400 1/4000 1/6500 1/9500   Requires Quantum Turbo battery to power http://www.vdhphoto.com/quantum/pages/qflash2.htm
Quantum Qflash X/X2 200W/S 880 - x x             50           1/400 1/1000 1/200 1/3600 1/5800 1/9900     Requires Quantum Q-Paq battery to power http://www.vdhphoto.com/quantum/pages/qflash2.htm
Quantum Qflash X/X2 400W/S 880 - x x             70           1/250 1/500 1/1000 1/2300 1/3600 1/5800 1/9900   Requires Quantum Q-Paq battery to power http://www.vdhphoto.com/quantum/pages/qflash2.htm
Sunpak Auto 444D     x               36                              
Sunpak 383 312 4 x               37                            
Sunpak 555 680 6   x             46           1/450 1/1000 1/2000 1/4000 1/8000 1/12000 1/17000      
Sunpak 544 6   x             46           1/450 1/1000 1/2000 1/4000 1/8000 1/12000 1/17000    
Sunpak  622 Super Pro       x             60           1/400             1/180000    
Sunpak  622 Auto     x             49                            
Sunpak 120J Auto 539 4 x           37     46                            
Vivitar 283 4 x               34                            
Vivitar 285 / 285HV 422 4 x             21 30 36       42 1/1000 1/2000 1/4000 - 1/16000 - -   The non-HV version has high voltage (6v+) circuits - this will blow many modern cameras  
- To get these in feet, multiply by 3.3   = probably too slow for action photography (should be >1/500)
- Multiply these by 1.4 for each extra stop iso you go up (eg GN40 @ 100iso = GN56 @ 200iso)
- If you double up flashes, the new GN = GN x 1.4   (eg 2x GN30 flashes = GN42)
- To get GN @ half power, divide the full power GN by 1.4. GN@1/4 = GN/1.96.