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.
Thanks Colin. I do use the red dot with five positions of the infinity symbol on approximately 50mm lenses. The wider I go the more out of synch the visible versus IR become. The most extreme is with my 14mm f2.8 MF Rokinon - which even in the visible spectrum has a large range of infinity focus. I notice Life Pixel, Kolari, and other conversion outfits only promise "general" focusing adjustments. It is no wonder, because lens, focal length, and distance to subject effect critical focus. Shot these with the D800 w-Nikkor 24mm f2,8 ais Reversed.
The 5D (circa 2008) has a postage stamp sized back screen that is quite dim. I haven't tried the live view, but I will see how well it works. Chimping has been relatively fast, and works well with my problem distances of 3'-300'.
Here is my mental division for infinity on the 55mm f3.5 Nikkor-P.C Micro. In the example it is at #2, but #1 or even left of the that (past infinity) is usually correct for infinity.
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. ...Show more →
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.
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.
GeorgeBo wrote:
Packing up for an upcoming extended holiday for Memorial Day. Weather permitting I will be back on the hiking trails at least a couple of days. This time it will be a film trip. So I thought I would throw together a gear shot while I am getting organized.
May be doing a lot of hiking soon. My company is consolidating locations and anyone outside of certain cities have to relocate. On their own dime.
My job will be in Atlanta. So having to decide to pull the plug or get an apartment for a few more years. Not selling my house here for that short time.
leighton w wrote:
Hike on up here, should only take you a few days.
James Markus wrote:
Thanks Colin. I do use the red dot with five positions of the infinity symbol on approximately 50mm lenses. The wider I go the more out of synch the visible versus IR become. The most extreme is with my 14mm f2.8 MF Rokinon - which even in the visible spectrum has a large range of infinity focus. I notice Life Pixel, Kolari, and other conversion outfits only promise "general" focusing adjustments. It is no wonder, because lens, focal length, and distance to subject effect critical focus. Shot these with the D800 w-Nikkor 24mm f2,8 ais Reversed.
The 5D (circa 2008) has a postage stamp sized back screen that is quite dim. I haven't tried the live view, but I will see how well it works. Chimping has been relatively fast, and works well with my problem distances of 3'-300'.
Jim,
Those general focus adjustments offered can often just be washers that are inserted between the sensor pcb and the body of the camera - i.e. to move the sensor plane further away from the lens. I know this because when I converted my D7100 to 720nm I also ordered the focus adjustment kit from Kolari and received a pack of 8 washers for $20. It is a rip-off but actually worked pretty well. It reduced the focus problem such that I can fine-tune (in camera) all of my AF lenses. For MF I just set the lens to f/8 but still need to tweak the focus ring a little, especially for the 200/4 AI-S.
GeorgeBo wrote:
May be doing a lot of hiking soon. My company is consolidating locations and anyone outside of certain cities have to relocate. On their own dime.
My job will be in Atlanta. So having to decide to pull the plug or get an apartment for a few more years. Not selling my house here for that short time.
Oh man, that sucks! Are you eligible for early retirement?
Colin,
Your suggestion about live view led to my discovery that the original 5D does not have live view. However, I also own a 5D mkII that has been sorely neglected. Wheels are turning - what to do - what to do.
Jim
Technically yes, I meet the rule of 75, but 3 more years is a huge difference in pension lump sum. Hockey stick curve the last few years. Main thing is the insurance gap I would have to cover until age 65.
Lot of things to look at.
leighton w wrote:
Oh man, that sucks! Are you eligible for early retirement?
GeorgeBo wrote:
May be doing a lot of hiking soon. My company is consolidating locations and anyone outside of certain cities have to relocate. On their own dime.
My job will be in Atlanta. So having to decide to pull the plug or get an apartment for a few more years. Not selling my house here for that short time.
Yikes! You'll need those few days away to clear the mind and process that news.
George,
Sorry to hear of this news. Sometimes corporate priorities force employees to re-evaluate their's toward their employer. Hope that leads to a better place for you.
Jim
GeorgeBo wrote:
May be doing a lot of hiking soon. My company is consolidating locations and anyone outside of certain cities have to relocate. On their own dime.
My job will be in Atlanta. So having to decide to pull the plug or get an apartment for a few more years. Not selling my house here for that short time.
Thanks Jim. On the positive side, if I do make the temporary move, there are some nice camera shops in the Atlanta area
James Markus wrote:
George,
Sorry to hear of this news. Sometimes corporate priorities force employees to re-evaluate their's toward their employer. Hope that leads to a better place for you.
Jim
GeorgeBo wrote:
May be doing a lot of hiking soon. My company is consolidating locations and anyone outside of certain cities have to relocate. On their own dime.
My job will be in Atlanta. So having to decide to pull the plug or get an apartment for a few more years. Not selling my house here for that short time.
Wow, that must have been a shocker to hear. Wishing you a great week of long happy hikes and a clear mind!
And of course, the brain drain from the company as well.
Bummer news George, I know how that feels. If you do decide to stay with them for the three years, then keep receipts and get a good accountant.
James Markus wrote:
George,
Sorry to hear of this news. Sometimes corporate priorities force employees to re-evaluate their's toward their employer. Hope that leads to a better place for you.
Jim
GeorgeBo wrote:
May be doing a lot of hiking soon. My company is consolidating locations and anyone outside of certain cities have to relocate. On their own dime.
My job will be in Atlanta. So having to decide to pull the plug or get an apartment for a few more years. Not selling my house here for that short time.
George
That's rough, George. Hoping it all works out for you.
Sounds like a major decision. All the best George.
GeorgeBo wrote:
May be doing a lot of hiking soon. My company is consolidating locations and anyone outside of certain cities have to relocate. On their own dime.
My job will be in Atlanta. So having to decide to pull the plug or get an apartment for a few more years. Not selling my house here for that short time.
GroWeb wrote:
Samy, there is something very special about what film and a long exposure add to the atmosphere and tonality of your IR image.
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.
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.
mp356 wrote:
Serge, Edinburgh looks like a great place to photograph. Definitely colorful and nice architecture.
Scott, it sure is specially on sunny days which can be a bit of a rare commodity in Edinburgh.
Great captures of the Concorde. There is one at the NYC USS Intrepid Museum that I photographed a few years back, sadly with af. It s an awesome aircraft.
However, I also own a 5D mkII that has been sorely neglected. Wheels are turning - what to do - what to do.
