Lightnings taking a ride

by ceinmart

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15,878 reputation
2453
bio website j.mp/NZPHOTOS
location Auckland, New Zealand
age
visits member for 4 years
seen 20 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.


1d
comment What personal safety precautions do I need to take while traveling with a camera in Scandinavia?
... 'Netherlanders' than most other people and can easily accept a higher level of assertiveness etc than from some :-). As for me - I'm old, loud and inquisitive and have Irish ancestry :-). || Oh - and, on topic here - yes, I wander all over with a camera - and I mean ALL over, and have had an amazingly good run. I've been hassled a very few times - most often by Police or Soldiers or bore guards - but have found almost nowhere where I feel unsafe with a camera. Being old white and male helps in some cases (and not in others) but generally it seems the worls is usually safer than many think.
1d
comment What personal safety precautions do I need to take while traveling with a camera in Scandinavia?
+1 - I looked through your answers while trying to find what country you lived in and this told me. I liked especially " ... most of it with a camera around my neck (at least during my free time)," -> I resemble that :-). Most times when I go out I sling a DSLR around my mechk (side sling strap soince spinal surgery imn January last - helps reduce neck loading nicely). And knowing where you live (I'll assume for now you are a national) helps interactions with you. Based on various friends I have and by 'Dutch' nephew-in-law (now living in NZ) I expect a straighter up front answer from ...
1d
comment How can I amplify the light from a tiny white LED through a keyhole?
@Sathees I'm getting somewhat confused as to what the aim is. Who considers the light nop feasible and how big is the picture and how far from the lock and how much power may the LED use? It depends whether you want to prove it can be done or cannot be. Giove me say 1 Watt and a picture up to say 1m x 1m and position of picture somewhat fl;exible and I CAN illuminate it quite well with a single LED with a std keyhole. If you want to prove it cannot be done I never said trhe above :-).
2d
comment Can I use Minolta Maxxum lenses with Sony Alpha cameras?
@Itai noted that the older MC & MD manual lenses do not work. You can get adaptors that allow these now very old manual lenses to be used - obviously without AF. From memory there is no aperture control but if you set the camera in S mode and manually adjust aperture nthe camera will expose correctly. Some of these very old lenses can still b very good. Things like a 50mm f/1.2 prime which can probably be obtained for almost $0 and can be superb when in good condition. The adapters have an internal lens to allow infinity focus so the overall result depends on the quality of the adaptor.
2d
comment How can I use FF Nikon lenses on the Sony E-mount A7 with full function (AF, etc.)?
I'm guessing itis going to haqppen if it hasn't already. The A7RII has shaken the market up and while it is too dear at present, it or something similar will be half the price in the short to medium term. (say 2 years or less). That doesn't help you NOW but also the A7 family is producing new models at an astounding rate. Usually "buy it and enjoy it" is good advice but in this case the range is so dynamic that an small delay has a fair chance of paying dividends. Imagine eg an A7SII with stabilisation and onboard 4K recording and silent mode and ... (all as per A7RII).
2d
comment How can I amplify the light from a tiny white LED through a keyhole?
In almost all doors the lock can be removed for repair or modification and has ntop be installed somehow. You can usually reinstall the cover plate and handle on one side only without the mechanism in place and this goives you room inside the door for a light source. | Also, if the photos is what counts you can make a "fake" door from thin wooden sheet or even cardboard with the light near the "keyhole". This does not need to be full door size - just big enough to lool OK in the photo.
2d
comment How can I amplify the light from a tiny white LED through a keyhole?
Doew the door / why does the door have to be thick? If you take off the lock and remove works and replace on room-side coverplate only a light source can be very near hole. A narrow beam angle LED would work fine. Lenses may often be be PMMA = acrylic and can be made any size desired (within reason). A compination of the above should allow the results you want.
Aug
20
answered Can low tempertures permanently decrease the life of a camera battery?
Aug
13
comment Are RAWs in bracketed exposure (mostly) redundant?
.... I care much less about fine detail than whether I like the result and I think that in photos which were intended to be 'top quality' I'd notice that level of noise - even if I did not actually'care' about it in many cases. ie I think that those who seem to care quite a lot more than I often do about noise levels would find the differences significant.
Aug
13
comment Are RAWs in bracketed exposure (mostly) redundant?
Personal impression only - not a criticism of expressed opinion: A look at the +/- 1EV version at 100% crop shows there is substantially more noise in the single exposure version than in the 3 exposure version. This is visible across quite a lot of the image but especially so in the more shadowed areas eg on the base of the airconditioning unit. While this level of noise degradation would probably go unnoticed by most at eg typical screen resolutions I suspect it would start to show at 4K levels and in eg A4 prints. | This may sound like classic "pixel peeping", but for my own purposes ....
Aug
10
awarded  Yearling
Aug
5
revised Does street photography including children introduce any specific concern?
deleted 6 characters in body
Jul
15
awarded  Necromancer
Jul
10
revised Should I buy an original manufacturer battery, or is a generic brand OK?
added 2437 characters in body
Jul
8
revised Laws regarding photos taken from airplane?
added 84 characters in body
Jul
7
awarded  Good Answer
Jul
6
comment Laws regarding photos taken from airplane?
@Olin A copy would be interesting to see if still available.
Jul
5
revised Laws regarding photos taken from airplane?
Updated for 2015 conditions.Some spelling fixes. Changes how 2 photos are seen.
Jun
30
comment What battery types are suitable for low temperatures and high altitudes?
@ChrisWalton Yes - I responded now as Christoph noted about 5 hours ago that the link was broken. | The page you cite is OK but a bit general. I think it has been made by combining or just copying material fom elsewhere. eg Gargoyle "The LiFePO4 batteries are the safest type of Lithium batteries as they will not overheat, and even if punctured they will not catch on fire."and you get a significant number of other papers with that and assorted other text identical. | I've got a 40 Ah 24V LiFePO4 battery running here as part of a prototype system.
Jun
30
comment What battery types are suitable for low temperatures and high altitudes?
@Christoph - Substitute paper provided - not identical in theme.