Road Train !!!!!!!!!!

by Russell McMahon

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14,330 reputation
1846
bio website j.mp/NZPHOTOS
location Auckland, New Zealand
age
visits member for 3 years
seen 6 hours ago

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.


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revised How should I approach people to take their portrait?
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revised How should I approach people to take their portrait?
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revised What are the disadvantages of SLT-cameras and are they THAT bad?
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comment What are the disadvantages of SLT-cameras and are they THAT bad?
@AndreasHartmann - Yes. Quality varies. If buying in my country I ask if there is a warranty - usually there is even on an auction site - but I've had good luck and all have lasted acceptably well. If buying from or in China in small volume its pot luck. I bought a number in Hong Kong (for A200 or A700) and they were all acceptable.
2d
comment Is RoboImport abandoned?
The webpages for both products are live and readily accessible. This sounds like gross laziness or an attempt to advertise a product. (Both are in fact made by the same company).
2d
comment Generic battery advice for Sony's NP-FW50
It would have if they were but they won't be so it hasn't :-). The stated voltage is an approximation to the average for 2 LiIon cells in series and both are close enough to correct to be unimportant.
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revised Generic battery advice for Sony's NP-FW50
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revised Generic battery advice for Sony's NP-FW50
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answered Generic battery advice for Sony's NP-FW50
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comment What are the disadvantages of SLT-cameras and are they THAT bad?
.... replacement with, he said, 100% success.
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comment What are the disadvantages of SLT-cameras and are they THAT bad?
Hugo - Sorry if I seemed to be criticising - I've had various people misunderstand the 1/3 light vs 1/2 stop claim and thought I'd spell it out so people knew what I was saying. Actual loss is a little hard to come by formally - but here is a site by a man who seems to know his stuff which **measures mirror loss and examines mirror distortion‌​. He says the mirror gives 1/2 f stop and also causes noticeable quality degradation. Examples shown with and without mirror. I've read of someone using plastic wrap as a mirror ...
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revised What are the disadvantages of SLT-cameras and are they THAT bad?
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comment Disadvantages of electronic viewfinders?
Re "The remaining problem though for MF is lag. Just like the EVF lags action, it lags behind the focus-ring too and on some cameras I find it rather hard to get focus exactly right without back-and-forth movement." -> NB FYI only: On my Sony A77 with EVF I have never noticed manual focusing being a problem. I have high level focus peaking set "as of right". I can disable it but would probably never choose to. | Just had a play in low light conditions - focus ability not noticeably affected by EVF delay.
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comment What are the disadvantages of SLT-cameras and are they THAT bad?
The pellicle loss is actually ~= 1/3 of the light but ~= 1/2 of an f stop loss due to logarithmic nature of the calculation. eg 2/3 x 2/3 = 4/9 = 0.444 of original = > 1 stop so 1/3 loss is > 1/2 stop. 1/2 a stop is (1-1/sqrt2) loss = 1-0.7071 =~ 29.3% loss. The difference between 1/2 and 1/3 of a stop is almost indistinguishable to mere mortals. Even a full 1/2 stop loss is relatively minimal as it reflects not in exposure, which is the same with an equal metering in both cases, but in aperture and/or shutter speed used. eg 1/100th of a second would become 1/70th, all else being equal.
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revised What are the disadvantages of SLT-cameras and are they THAT bad?
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answered What are the disadvantages of SLT-cameras and are they THAT bad?
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answered How bad is the EVF/LCD lag on the Sony A37?
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revised What can be done using a 18-55mm lens?
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revised What can be done using a 18-55mm lens?
Changed image link for a missing image
Aug
28
comment How do I get over my shyness when taking photos of strangers?
as at August 29 2014 the 100Strangers site has been taken over by an AdServer and the waybackmachine / internet archive declines to provide past coverage. I've changed the link to a site which appears to relate - you may wish to check. Also added a Flickr photostream link for the project.