My Return to Infrared Photography Part II
In Part I of this discussion I explained my current foray into digital infrared (IR) photography and using the Sigma SD1M as my camera of choice. My reasons for choosing the SD1M is the user-friendly removal of the IR blocking filter, and the fact that I currently use the SD1M in my color art photography work. I like the Foveon sensor of the SD1M very much and if you want to use a Foveon sensor, you will have to use a Sigma camera.
My shooting technique has been updated to reflect my most recent discoveries involving focusing and exposure. This is the sequence I am now employing: I remove the IR blocking filter from the body, set ISO at 100 with an exposure bracketing sequence of [0, -1, +1]. I install the lens with autofocus (AF) selected and without the Hoya R72 filter. I look through the viewfinder and compose the image. Once AF is achieved, I set the lens to manual focus (MF) and make the bracketed series. The images captured up to this point are not IR exposures, but exposures without the IR blocking filter and are classified as Full-Spectrum or Visible and Near-Infrared (VNIR) photography.
Here is an example of a photo with the IR blocking filter removed, and without the R72 filter installed on the lens. You can tell it is not an IR image but a VNIR image by the white sky.
Retired Fire Truck (non-IR version) | 10-20mm, 1/5 sec @ f/11
I have decided I will be shooting these types of black & white (B&W) images alongside the IR shots because they may provide a decent B&W image (you never know). I will be experimenting further with this type of B&W photography by placing black & white filtration on the lens (yellow, orange, green and red) with an ultraviolet (UV) filter to see if the filtration can add to the images as well. Photography can be about experimenting, and this I do enjoy when I am trying out new gear and developing new techniques.
After I have taken the first sequence of images without the R72 filter, I look at the exposures on the LCD screen for what appears to be the best exposure. When I find that exposure (and provided the light has not changed drastically in the environment), I manually set that exposure on the camera. I then place the R72 filter on the lens and re-shoot. The previous exposure and focus should be adequate for the IR shots. After shooting the IR shots, I look at the LCD screen and histogram to see if there is one good exposure, and if so I am done, if not, I adjust the exposure via shutter speed one stop up or down and re-shoot the bracketed series. Here is the IR image of the Retired Fire Truck:
Retired Fire Truck | 10-20mm, 1/10 sec @ f/11
(click on photo for larger preview)
Post Processing Images
Unprocessed IR Image seen as Color Image in SPP
Processed Monochrome IR image before export into LR.
Close-Up of SPP Panel Adjustment Settings Used
The Panel Adjustments | Only Color Mixer and Above were used.
Below is the finished image after tweaking the tone in Silver Efex Pro, and the building's perspective in Photoshop. The building is quite old and does not appear to be square to any corner. One of the things I enjoy about where I live is the little towns and historical small unincorporated communities that are within driving distance. These secluded and historic areas help make photography an enjoyable vocation for me.
New Shiloh AME Church | 10-20mm, 1/80 sec @ f/11
(click on photo for larger preview)
IR Shooting Technique Checklist (revised)
I was shooting with a new Sigma 10-20mm f/3.5 EX DC HSM lens for these photos. It was my second copy after my first was purchased used and was found to be decentered. The lens performed well with minor AF hunting which was easily resolved through selecting a focus point in a high contrast area. I did not find any ghosting on my images and the focus was precise with all images.
I hope you have enjoyed reading this photographic adventure I recently walked down. One reason I wanted to give digital IR a try was to see how I may be able to adapt some of it to digital B&W photography. I enjoy looking at good B&W photography (I am aware Michael Kenna shoots Hasselblads and film; he is just a quick example of what I like). Unfortunately not a lot of what I see on the net today excites me.
IR photography does not appeal to everyone and I have made some IR images that I do not like, but I am on a mission to discover for myself what I am looking for with B&W digital photography, and this has been a step in the right direction for me. I will be adding more IR photos to my Infrared Gallery as I make them, and hope to begin developing a B&W gallery of images in the near future. Stay tune if you are interested in seeing how I experiment more with digital B&W and IR photography.
*some of my lenses AF through the R72 filter just fine
Keywords: antique fire truck, fire truck, historic country church, infrared photography, sigma 10mm-20mm lens, sigma sd1 merrill
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