Red and Blue

by Gordon

submit your photo


Hall of Fame
View past winners from this year

Please participate in Meta
and help us grow.

15,150 reputation
1952
bio website j.mp/NZPHOTOS
location Auckland, New Zealand
age
visits member for 3 years, 9 months
seen 6 hours ago

merge keep
Contact - apptechnz at gmail com <- you know the drill.

Electronic designer. Professional Engineer. Oldish aka "reasonably experienced" :-).
Contact - apptechnz gmail com <- you know the drill.
Tel: +64 9 837 2999 gmt+13

Special interest in technological solutions for developing country applications. Extensive in-China experience in product development & manufacturing in China.

Jack of all trades, Master of Electrical engineering. (aka ME (elec)) Interested in all aspects of modern technology. Professional qualifications in electrical engineering but practically proficient or conversant in many peripheral areas.

Recent extensive experience in solar powered LED lighting development and manufacturing in China for markets worldwide.

"Servant of the Most High God" / committed Christian. Happy to work enthusiastically and interact amicably with people of all nationalities and creeds.

Married with 2 adult children.

Obsessional photographer.


Jul
31
comment Powering a Nikon SB-28 or Cobra flash with an external (not portable) power supply for studio use.
@Oliver - I hadn't been shown the 2nd one until now. Both are potentially OK. The 2nd one does not mention ripple voltage BUT when buying cheap Chinese products the claims and reality are not certain to match. So, whatever you buy, check the voltage as noted above.
Jul
31
comment Powering a Nikon SB-28 or Cobra flash with an external (not portable) power supply for studio use.
@Oliver - Yes - statements indicate it's regulated - a supply of that rating and size will be a switched mode supply so regulated as of right (almost :-) ). Worth checking when you get it or whatever you buy. Connect voltmeter across unloaded output. Vmax not over 6.5V. PROBABLY safe to 7V and maybe quite a bit more but this is uncertain. If above 6.5V a small permanent load will probably load it down enough. An eg 560 ohm resistor will draw ~= 10 mA and dissipate under 1/8th Watt so any 560 R would do. Smaller resistors will load it more and heat more. Report measurement when available.
Jul
31
comment What is this effect called and how can I post process my photos to get this effect?
@StanRogers - Bob I knew not :-). I do now. An FSM wannabee I see. A genuine piece of US inconography which I happened on unawares of its wider import. All images were sourced from CCS SA licence sources as cited, FWIW.
Jul
31
answered Why do my photos look like they're painted?
Jul
31
revised What is this effect called and how can I post process my photos to get this effect?
added 1082 characters in body
Jul
31
revised What is this effect called and how can I post process my photos to get this effect?
added 551 characters in body; added 621 characters in body
Jul
31
answered What is this effect called and how can I post process my photos to get this effect?
Jul
31
revised Powering a Nikon SB-28 or Cobra flash with an external (not portable) power supply for studio use.
edited title; edited title
Jul
31
revised Powering a Nikon SB-28 or Cobra flash with an external (not portable) power supply for studio use.
added 3797 characters in body; added 77 characters in body
Jul
30
comment Powering a Nikon SB-28 or Cobra flash with an external (not portable) power supply for studio use.
@Oliver - Both those look tres bon. As they are the same price you might as well buy the 3A one. They SHOULD be regulated BUT I'd test what I bought with a voltmeter before use. Vout should never be more than 6.5 Volts, even when unloaded. Chances are that the flash will accept slightly higher Voltage, but maybe not.
Jul
30
revised How To Fix Badly Functioning Shutter Release-Button?
added 2 characters in body
Jul
30
revised Powering a Nikon SB-28 or Cobra flash with an external (not portable) power supply for studio use.
added 1846 characters in body
Jul
30
answered Powering a Nikon SB-28 or Cobra flash with an external (not portable) power supply for studio use.
Jul
29
comment How To Fix Badly Functioning Shutter Release-Button?
@JohnVice - see addition to my answer re flash voltage. Your small flash will probably produce 200 to 300 Volts internally.
Jul
29
answered How To Fix Badly Functioning Shutter Release-Button?
Jul
29
comment Why do people in the stands during events use flash?
This doesn't apply when the subject is tens of metres+ away.
Jul
28
comment How can I backup my RAW photos while travelling without Internet access?
@AJFinch - what you want is what many people would want. Confirmation of transfer is essential. Incremental transfer would be nice. With a Raspberry Pi you have 1080p video available - you could usually not use this but make it able to act as a media viewer when a screen was available.
Jul
28
comment How To Fix Badly Functioning Shutter Release-Button?
@JohnVice - Capacitor will usually self discharge in minutes to tens of minutes. Maybe a few hours if very good quality. Shorting capacitor with a say 1k resistor will discharge it in a few seconds. Shorting with a wire will discharge it rapidly. Small danger of minor metal spatter into eyes if wire used. Ordinary glasses would protect OK. Can be a LARGE bang from high power flashes - 1 k resistor better.
Jul
27
awarded  Nice Answer
Jul
27
answered How can I ensure my gray card is color-accurate?