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| A Quick? Lens Test - Page 2 | |
| Nikkor 18-105 for IR and a 16mm Fish Eye | Rate Topic |
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| Posted: Sun Sep 17th, 2017 02:29 |
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11th Post |
Robert
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This is an example of the strong effect it can have on clouds and condensation trails. Taken at 8am in Sept. 2014. During the day it's hard to take any photographs without them with such a wide lens. We seem to be situated directly under a major flight path, the M6 of the skies! I have 282 images I took with the Sigma 10-20 and no doubt some went in the bin. Nikon D3100, Sigma 10-20mm f4/5.6, 10mm, 1/160sec @ f6.3 ISO 100  Another taken at Mallory Park, June 2008. D200, Sigma 10-20mm f4/5.6, 14mm, 1/2500sec @ f4.8 ISO 400 
____________________ Robert. |
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| Posted: Sun Sep 17th, 2017 08:51 |
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12th Post |
Eric
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What focal length was actually used on those? When I used that lens I rarely used it wide open....mostly at 14mm. I suppose strictly speaking 16mm isn't fisheye. I thought they were ultra wide lenses above 10mm?
____________________ Eric |
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| Posted: Sun Sep 17th, 2017 16:17 |
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13th Post |
Robert
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The first at 10mm the second at 14mm, I usually tended to keep away from the 10mm end to avoid the extreme extortion. The 16mm is officially a FX full frame Fisheye, it has noticeable barrel distortion. It's just in that location which has few straight lines, it looks good. The 8mm and below produce a circular image in the middle of an FX frame, just reaching the width (24mm) of the frame. Those lenses have much greater distortion and have very limited application.
____________________ Robert. |
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| Posted: Sun Sep 17th, 2017 16:48 |
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14th Post |
jk
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My Sigma Nikon fit 12-24 FX lens (I got it from Eric a while back) is pretty good wrt to distortion but is soft at edges at 12mm. Om my Fuji I have a Samyang 8mm that is excellent. Low distortion despite being sold as fisheye and very sharp edge to edge. However it is APS-C as it is for the Fuji.
____________________ Still learning after all these years! https://nikondslr.uk/gallery_view.php?user=2&folderid=none |
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| Posted: Thu Sep 21st, 2017 08:28 |
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15th Post |
highlander
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The best ultra wide I ever found was the Tokina 12-24. Sharp the whole way, but only works on DX
____________________ Blog https://blythestorm.com Website http://www.blythestormphotography.com |
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| Posted: Thu Sep 21st, 2017 19:08 |
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16th Post |
Robert
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I'm well jarred off, I just spent an hour and a half making exposures with the 16mm fish, only to find they were out of focus. It's hard to tell in the dark. I did check that the lens was on infinity but I must have misread the scale. The D3 focus indicator had both arrows showing but no confirmation dot... Anyway I did take some with the 20mm f2.8 just for comparison. Here is the best one, it was pretty cloudy. Polaris is the brightest star in the top right quarter. D3, Nikkor 20mm f2.8, 20sec at f3.5 ISO 1600 
____________________ Robert. |
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| Posted: Fri Sep 22nd, 2017 01:42 |
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17th Post |
jk
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Good image, I like it even with the orange sodium glow. Now we see the effects of pointing a wideangle upwards with striaight lines in the edge of the image. Falling over house! And that is with the 20mm, not the 16mm.
____________________ Still learning after all these years! https://nikondslr.uk/gallery_view.php?user=2&folderid=none |
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| Posted: Fri Sep 22nd, 2017 02:40 |
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18th Post |
Robert
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Thank you JK, the brickworks have a variety of lighting, I hope one day to be able to wander around the works, last night I was on the boundary. I was trying to establish where Polaris was in relation to the chimney. I had a fanciful idea of placing Polaris just above the chimney and having star trails around the chimney top. To achieve that I would have to locate myself on the main roof... NOT feasible I suspect. The falling over building adds another dimension! LOL About a mile away there is a brand new building made of special steel, unpainted, it has been constructed completely leaning and twisted on purpose. That's in my sights for a star trails photo too. It's called the Red Hut. If I get it one way I might straighten it, the other way it will make the lean worse... Perhaps with the fisheye, in a corner? FUN
____________________ Robert. |
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