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GroWeb
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Re: Manual Focus Nikon Glass


saph wrote:
Glen, I always feel inspired by your and Colin's infrareds, but hadn't done anything about it until a couple days back.

Chamonix 45N-2, Nikkor-W 135 f/5.6 with Hoya R72 filter, Rollei Infrared 4X5 sheet film, developed in Cinestill Df96 monobath for ~4.5 min.

There's a few people sitting under the covered structure, one person skating away just to the right of the structure (saw him coming in from the left and managed to get that 1/4s shutter release just as he emerged on the right), and a couple at the far right of the fence looking over at the water.

Samy, there is something very special about what film and a long exposure add to the atmosphere and tonality of your IR image.

James Markus wrote:
I also shot some IR recently, and revisited my initial testing of the 55mm F3.5 for sharpness. Of my three copies of the 55mm - the oldest one (ai'd Nikkor-P.C) is the sharpest, resolving more fine details. I haven't found any way to reliably set focus (except infinity) other than chimping the camera back screen to get the subject I want in focus as sharp as possible. I rarely ever encounter a hot spot, but acutance seems to be a real issue in IR particularly highlights blooming. It is difficult having IR focus on a different plane than visible light, or what the sensor thinks is visible light - at least I think that is what is happening.

EDIT to add
A 10 image infrared stack of the same dandelion (not as close) with the 5D and the 55mm f3.5 ai micro - grayscale.

Jim, I have the same problem with reliable focusing on my Fuji camera, despite my use of focus peaking and zooming into the focus point which, according to the LifePixel people, should work as it would with an unconverted sensor. You seem to have done a nice job of it on your latest images, though.

Here are a few more from Bald Mountain: the first one is from the 24 f/2.8 NC and the others are from the 85 f/1.8 HC.





May 23, 2023 at 01:57 PM
GroWeb
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Upload & Sell: On
Re: Manual Focus Nikon Glass


saph wrote:
Glen, I always feel inspired by your and Colin's infrareds, but hadn't done anything about it until a couple days back.

Chamonix 45N-2, Nikkor-W 135 f/5.6 with Hoya R72 filter, Rollei Infrared 4X5 sheet film, developed in Cinestill Df96 monobath for ~4.5 min.

There's a few people sitting under the covered structure, one person skating away just to the right of the structure (saw him coming in from the left and managed to get that 1/4s shutter release just as he emerged on the right), and a couple at the far right of the fence looking over at the water.

Samy, there is something very special about what film and a long exposure add to the atmosphere and tonality of your IR image.

James Markus wrote:
I also shot some IR recently, and revisited my initial testing of the 55mm F3.5 for sharpness. Of my three copies of the 55mm - the oldest one (ai'd Nikkor-P.C) is the sharpest, resolving more fine details. I haven't found any way to reliably set focus (except infinity) other than chimping the camera back screen to get the subject I want in focus as sharp as possible. I rarely ever encounter a hot spot, but acutance seems to be a real issue in IR particularly highlights blooming. It is difficult having IR focus on a different plane than visible light, or what the sensor thinks is visible light - at least I think that is what is happening.

EDIT to add
A 10 image infrared stack of the same dandelion (not as close) with the 5D and the 55mm f3.5 ai micro - grayscale.

Jim, I have the same problem with reliable focusing on my Fuji camera, despite my use of focus peaking and zooming into the focus point. You seem to have done a nice job of it on your latest images, though.

Here are a few more from Bald Mountain: the first one is from the 24 f/2.8 NC and the others are from the 85 f/1.8 HC.





May 23, 2023 at 12:06 PM





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