| Joined: | Mon Apr 2nd, 2012 |
| Location: | South Lakeland, UK |
| Posts: | 4066 |
| Status: |
Offline
|
Robert wrote:
Finally a UV fluorescence image, taken with a normal camera but in pure UV light at 365nM using a special Nichia high power UV LED.
The bright particles are probably pollen but some could be microfibres of manmade fabric, which fluoresce brightly in UV light.
Robert please can you give more info on the UV image.
Camera and conversion details
Lens
Any filters
Light is the Nichia UV LED - i hav a similar one in a torch
JK, That image above isn't a UV image taken in the UV spectrum, it's a Visible spectrum image, taken in pure UV light. You can reproduce this with almost any normal camera and your SpiderFire UV Torch, the wavelength will be a bit longer at about 385nM but it should still work OK.
My UV camera is a D200 with the LPF removed and replaced with a plain fluoride glass replacement. Here is an image taken with it using a Venus UV pass filter at 365nM. Back focus adjustment is about 21mm @ ~ 500mm using my Micro Nikkor 55mm f2.8, @ f2.8. Illuminated by a 3W UV LED with a home built adjustable Fluoride condenser lens.
The Micro Nikkor isn't Ideal it attenuates the UV too much. I am hoping to get an EL Nikkor about 70 or 80mm with a helix adaptor. The metal body EL lenses are best, they pass the greatest amount of UV because they are not coated.
From memory you have a 105mm bellows Nikkor, that may be OK because I don't think that has coated elements...
Same flower as above.
Attachment: Rudbeckia UV web a 97.jpg (Downloaded 16 times)
____________________
Robert.