SD Quattro Infrared

Lincoln Castricone · Sep 13, 2016

Just started using the SD Quattro with the IR filter/dust cover removed and a Hoya R 72 IR filter on the 17-70 2.8-4.0 DC lens. Raw images are converted to monochrome in SPP and saved as tifs without any additional adjustments in SPP. Very impressed with the contrast, sharpness and tonal range.

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lincolncastricone.photodeck.com

gregscamera · Sep 13, 2016

Very nice!

A true benefit of using the sensor to focus

kthxjapan · Sep 14, 2016

Lincoln Castricone said:
Just started using the SD Quattro with the IR filter/dust cover removed and a Hoya R 72 IR filter on the 17-70 2.8-4.0 DC lens.

These are great. Currently headed to ye old local camera store to pick up a Kenko R72 IR filter for my 18-35 because of this thread.

SigmaTog · Sep 14, 2016

Seriously good Lincoln

ΣigmaTog

atom14 · Sep 14, 2016

SigmaTog said:
Seriously good Lincoln

ΣigmaTog

I seriously thought you'd think so, 'Tog.

Linc. I thought the same when I saw this post before.

atom14.

kthxjapan · Sep 14, 2016

Tested using flash with the EF-630, and it emits plenty of usable light >720nm. I was using it in TTL mode without Flash Exposure Compensation and it wasn't even unrecoverably blowing out like it does normally, and still lit the background well.

Will try to get some shots of something other than my dog to share later.

xpatUSA · Sep 14, 2016

SigmaTog said:
Seriously good, Lincoln

+1

Hemidart · Sep 14, 2016

That's cool......love the look!

Here is a pic I did of some corn rows with Kodak Hi-Speed Infrared back in 84ish. Still trips me out how much easier it is to do infrared. Used to be kind of a pain.

Sorry about the sandiness... :-D

Kendall Helmstetter Gelner · Sep 14, 2016

I've not had a chance to try IR work with the SDQ yet, but your images are giving me some ideas...

Anything special to mention when shooting you had to watch out for? Any processing tips?

naturetech · Sep 15, 2016

Incredible pics ... I have always loved Infrared, and have long wanted to try it. You are seriously swaying me towards the SDQ!

Lincoln Castricone · Sep 15, 2016

Thank you!! Processing was very simple as described and the tifs require less PP than my converted Canon 5d does after a lot of adjustments in ACR. the Sigma Images are almost usable right out of SPP (w/o adjustments other than 'mark monochrome' and 'save as tif').

Lincoln Castricone · Sep 15, 2016

I forgot to mention the one caveat. The Dust Cover/ IR filter is delicate and very tricky to remove and so far for me even more difficult to reinstall. The first removal resulted in a big chunk of dust on the sensor and this camera does not auto clean the sensor. Not even sure if replacements are available from Sigma. Since I do a lot of IR vs color it is almost worth it for me to buy another camera body for color.

Lincoln Castricone · Sep 15, 2016

Thanks everyone for your feedback!!

kthxjapan · Sep 15, 2016

IR is much more sensitive to dust on the sensor, when I had the IR filter on, I had spots, that vanished in visible plus IR.. I thought it was the filter, and eventually spotted it on the sensor and got out the rocket blower.

My guess is that this is because IR is more resistant to reflection, its not working around the dust.

kthxjapan · Sep 16, 2016

Ran into a mikoshi matsuri (portable shrine festival). Took some bad photos.

Here are some ISO400 shots at night with a R72 filter on the 18-35 and the EF-630. It's pretty surreal because there's almost no "normal" light, the city looks dead. The only processing I did was to correct exposure a bit by adjusting the "Color Mixer" in SPP, since there's much less data in the blue/green layers and more in the red, and this is effective high quality exposure control relative to changing "Exposure" itself.

Lincoln Castricone · Sep 16, 2016

Thanks and yes....It would be ideal to have a clear dust filter on an SDQ reserved fot IR only....

Hemidart · Sep 16, 2016

So when you remove the IR filter, the sensor has zero protection?

danski0224 · Sep 16, 2016

Lincoln Castricone said:
Since I do a lot of IR vs color it is almost worth it for me to buy another camera body for color.

--
lincolncastricone.photodeck.com

You can use an external "hot mirror" filter- it will essentially do the same thing as the Sigma dust protector. These are available from several manufacturers/vendors, one is Kolari Vision. Kolari Vision sort of specializes in IR accessories and conversions.

Taking a picture without the dust protector (IR blocking) filter would be comparable to using a "full spectrum conversion" camera from any manufacturer but Sigma. A "hot mirror" needs to be used on a full spectrum converted camera to have usable regular color images without extensive post processing.

danski0224 · Sep 16, 2016

Hemidart said:
So when you remove the IR filter, the sensor has zero protection?

There is no mirror or shutter in front of the sensor, so yes to "no protection". There is a cover glass.

The Sigma sensor is not "self-cleaning", either.

rick decker · Sep 16, 2016

Hi Lincoln: Thanks for the samples. It would be nice to see the first one in full-size hi-rez.

A few questions. Did you leave the channel wheel set to default (in center) and leave all the sliders at zero (which I believe you indicated). Also how did you AF ( filter on or filter off) and what meter adjustmens did you do.

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