Led ring flash

Hi guys,

Anyone got any feedback on these please :-

http://cgi.ebay.co.uk/Macro-Ring-Flash-LED-Light-PENTAX-K-7-K10D-K20D-K100D-/180...

regards
Bernard

There were three main issues with these type of things when they first came out some years ago. First is light output - far too low on early models - likely much better now as some very powerful LED's are available. Second issue was colour temperature of the LED's - not sure how good/consistent they are or indeed suitable for photography? Third issue was "hotspots" caused but poor diffusers. Cost of linked item is pretty good so I think you should buy one and test it for us Bernard ...

Vic.

total input of 5W. Hmm.

Bret - who is about to order some serious HI-CRI cree XP-Gs from Oz at less than a fiver each

.

I'd be happy to do the same but there's the inevitable problem of packaging. Most of my homebrew electronics suffers this way- works absolutely fine but looks yuk and mounting is iffy.

I did try a parasol lamp from Poundland which wasn't too bad, but I admit, a bit dim for the job I wanted it for. It eventually broke as it wasn't intended to be used opened into a "C" shape

Bernard

I have a lot of ideas on that kind of thing; there's another problem, and that's heat. I figure 100mm dia should be fine - there's no problem with getting some aluminim cut for the baseplate and then the question is diffusion - which should be doable with some frosted Lexan.

Maybe even cheat and use some long M4 screws through from the lexan to the base plate - with threaded holes in the alu.

Bret

I'm not sure direct LED illumination is such a good idea. I think maybe half a Toroidal reflector + diffuser would be better?

Vic.