f/8 1/400 ISO 1600
f/8 1/400 ISO 640
I enjoy pushing boundaries which is just one reason I like
to capture in the infrared spectrum. I'm
currently on my 3rd converted camera having begun with a Canon 1DsII then a
Sony NEX7 both converted to capture in the 665nm range. The current camera is a Sony A7r which I had
converted to capture 665nm and later re-converted to capture full
spectrum.
The first thing I've learned in capturing IR is that not all
lenses play well with some producing a hot spot (normally found in the center
of the image). I quickly found that it
didn't matter the manufacture or the cost of the lens, if it was going to give
me a hot spot. I've had an expensive
lens produce a hot shot while a cheaper on didn't, then again I was surprised
when it happened in reverse. There's
several listing of lenses that produce hot spots just do a web search to find
them. This is the most terrifying aspect
for me when ordering a new lens and so far with the 7r I've been very
lucky. I have now tried several lenses,
Sony FE 70-200, FE 55, FE35, FE24-70, FE16-35 and the super fast Mitakon
Speedmaster II 50mm f/0.95 and all perform well.
f/8 1/640 ISO 1000
f/8 1/640 ISO 2000
The images included here were all captured using the Sony
A7r converted to full spectrum with a 830nm filter attached to the new
Sony FE 16-35mm lens. All the samples were
captured at 16mm handheld with the ISO set to "Auto".
f/10 1/640 ISO 2500
f/10 1/640 ISO 2500
The files were opened in Capture One Pro where a lens
correction was applied prior to correcting the white balance. Minor processing was also done on a case by
case basis before saving as a Tiff and sent to Photoshop CC. Once in PS the files were opened where I ran
an automated infrared adjustment as well as using the shake reduction filter (I
do this on any handheld file) then resized and saved as a jpeg. No other processing was performed likewise no
cropping was done.
f/10 1/640 ISO 1000
f/10 1/640 ISO 2500
My instant gut reaction as to how the new Sony FE16-35
performs with a infrared converted camera is favorable. I've now tested the lens in full spectrum and
830nm and can find no fault. I plan on
testing in 590 and 720 shortly and will post those results as well.
Once again thanks for visiting.
Don
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