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| Lenses - Page 2 | |
| Old Glass vs. New | Rating: 
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| Posted: Mon Apr 22nd, 2013 14:39 |
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11th Post |
Robert
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This was taken with D200 and Nikkor 55mm f2.8 Micro. Attachment: Rudbeckia vis web a 3502.jpg (Downloaded 18 times)
____________________ Robert. |
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| Posted: Mon Apr 22nd, 2013 14:42 |
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12th Post |
Robert
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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. Attachment: Rudbeckia UV Fl a web 3505.jpg (Downloaded 18 times)
____________________ Robert. |
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| Posted: Mon Apr 22nd, 2013 14:54 |
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13th Post |
jk
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slrN is the Kodak slrN 14MP FF camera.
____________________ Still learning after all these years! https://nikondslr.uk/gallery_view.php?user=2&folderid=none |
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| Posted: Mon Apr 22nd, 2013 14:54 |
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14th Post |
Robert
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novicius wrote:Ah that explains it , so then when the rear element is very close to the sensor there should be a hot spot , do not have that with the 55 f1.2 which has a rather large rear element very close to the sensor , have n`t noticed anything sofar , but then the slrN has no AA filter , which makes it susceptible to moir¨ tho`. It's not so much the closeness, as how flat the rear element is, the Nikkor 50-1.4 has a very flat rear element, from my limited experiments that lens has about the flattest rear element I have seen and I believe that is the problem. This is another aspect of 'optimising for digital' Film doesn't reflect in the same way as the LPF.
____________________ Robert. |
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| Posted: Mon Apr 22nd, 2013 14:57 |
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15th Post |
jk
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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. 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 
____________________ Still learning after all these years! https://nikondslr.uk/gallery_view.php?user=2&folderid=none |
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| Posted: Mon Apr 22nd, 2013 14:59 |
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16th Post |
jk
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Vic I'll swap you my Nikon 50mm f1.8 AF for your 50mm f1.2 Only one stop difference!
____________________ Still learning after all these years! https://nikondslr.uk/gallery_view.php?user=2&folderid=none |
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| Posted: Mon Apr 22nd, 2013 15:49 |
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17th Post |
Robert
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jk wrote:Robert wrote: 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. |
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| Posted: Mon Apr 22nd, 2013 16:10 |
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18th Post |
Robert
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Vic, here is a composite image taken with two D1's, one normal the other IR converted @ 720nM and blended together. Bot using the same lens, but I forget which! LOL Looking at it now the border needs toning down... Attachment: Screen Shot 2013-04-22 at 22.06.36.jpg (Downloaded 15 times)
____________________ Robert. |
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| Posted: Mon Apr 22nd, 2013 17:14 |
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19th Post |
novicius
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This one... Attachment: slrn_front.jpg (Downloaded 15 times)
____________________ Back in Danmark I do not use my equipment to make photo`s .. I take photo`s to use my equipment The better I become at photography,the better my camera gets. |
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| Posted: Mon Apr 22nd, 2013 17:22 |
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20th Post |
novicius
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Had to ask my eldest son for help , Robert , those are FANTASTIC shots  Soon I will be able t` make a decision
____________________ Back in Danmark I do not use my equipment to make photo`s .. I take photo`s to use my equipment The better I become at photography,the better my camera gets. |
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