Removing IR-UV cut filter of the IQ3

[ThdeDude]

I am considering going the "full spectrum" route by removing the S8612 IR-UV cut filter from my IQ3-100. Would use a lens mounted IR-UV filter for real color photography and would start by using a 590nm filter for "Super Color IR" (LifePixel marketing).

Looks easy enough by unscrewing the ten screws.

Done before? Any experience, suggestions or recommendations?

 

[buildbot]

I am considering going the "full spectrum" route by removing the S8612 IR-UV cut filter from my IQ3-100. Would use a lens mounted IR-UV filter for real color photography and would start by using a 590nm filter for "Super Color IR" (LifePixel marketing).

Looks easy enough by unscrewing the ten screws.

Done before? Any experience, suggestions or recommendations?

View attachment 203287

You are 100% the most brave person haha, I don’t think anyone has tried that on an IQ3 at least.

I don’t think that is all you need actually, because another forum member had an IQ3 that was missing those screws at one point.

I could be wrong, but Phase One will actually do this conversion for a price, switching to the filter they use on the IQ3 Achro.
I say I think because I have only seen mention of such a thing on the phase one serial prefix list:

 

[MartinN]

Focus needs recalibration ? That was one of the problems with removing the ’removable’ filter from ZDB and ZD camera. I may investigate this some time, but for now I shoot IR sensitive film. https://www.getdpi.com/forum/index.php?threads/mamiya-zd-for-ir.1611/

 

[ThdeDude]

Focus needs recalibration ?

To be used on a technical camera, i.e. is focussed using DB's display.

 

[ThdeDude]

I could be wrong, but Phase One will actually do this conversion for a price, switching to the filter they use on the IQ3 Achro.

According to digitaltransitions.com/new-phase-one-iq3-100mp-achromatic-digital-back/ , "Phase One IQ3 100MP Achromatic, ... without an Infrared (IR) cut-off or Bayer pattern filter."

But still could have a glass plate as protection. Will check with PhaseOne.

 

[buildbot]

According to digitaltransitions.com/new-phase-one-iq3-100mp-achromatic-digital-back/ , "Phase One IQ3 100MP Achromatic, ... without an Infrared (IR) cut-off or Bayer pattern filter."

But still could have a glass plate as protection. Will check with PhaseOne.

It 100% has glass (fused quartz?), mine does at least.

 

[tcdeveau]

I’m not sure it’s as simple as removing the filter, I’d have phase do it (or reach out to life pixel or kolari vision)

 

[ThdeDude]

I’m not sure it’s as simple as removing the filter, I’d have phase do it (or reach out to life pixel or kolari vision)

Thanks for the suggestion. Already wrote to all three.

Furthermore, Rodenstock states as to their Digarons, "To avoid blurring and color fringing caused by the sensor protection glass, the calculation of the optical design includes a 2 mm thick sensor glass."

Maybe should write to Rodenstock too!

 

[ThdeDude]

I could be wrong, but Phase One will actually do this conversion for a price, switching to the filter they use on the IQ3 Achro.

PhaseOne wrote back and confirmed that they would swap out the IR-UV filter for a clear filter as used on the IQ3 Achromatic for a measly $1250.-

 

[buildbot]

PhaseOne wrote back and confirmed that they would swap out the IR-UV filter for a clear filter as used on the IQ3 Achromatic for a measly $1250.-

Good to know!

 

[ThdeDude]

Good to know!

And also Kolari Vision wrote back: "Yes we can provide this service, it would cost $299 for the glass and service."

 

[anwarp]

I had phase change it for me on my old IQ260 a few years ago. They also adjust the sensor position slightly to compensate for the longer wavelength of IR photography.
When I use it on the XF, I have a different set of lens calibrations that I upload into the camera.
On the actus, live view is doable with a variable density filter to prevent the live view image blowing out completely. It’s easier to use the IQ4 to focus and then swap the backs!

The IQ3 100 will be straightforward to use. I wonder what the colour crosstalk will look like with IR. Will LCC work?

Good luck!

 

[ThdeDude]

The IQ3 100 will be straightforward to use. I wonder what the colour crosstalk will look like with IR. Will LCC work?

Funny, I just wrote to someone that to avoid potentially severe color crosstalk might be a good reason to get a IQ4-150 for that project.

 

[Steve Hendrix]

PhaseOne wrote back and confirmed that they would swap out the IR-UV filter for a clear filter as used on the IQ3 Achromatic for a measly $1250.-

Incidentally, we do offer this service - through Phase One, and yes, for that $1,250 price. But we will also conduct a secondary QC check before returning the digital back to you.


Steve Hendrix/CI

 

[J S H]

And also Kolari Vision wrote back: "Yes we can provide this service, it would cost $299 for the glass and service."

You can trust Kolari Vision, they are quite capable. I have had many cameras converted by them over the years, including the first GFX IR conversion they ever did. Ilija is who I deal with there and he is a stand up guy.

 

[ThdeDude]

You can trust Kolari Vision, they are quite capable. I have had many cameras converted by them over the years, including the first GFX IR conversion they ever did. Ilija is who I deal with there and he is a stand up guy.

Thanks for letting me know your experience. I also have a very positive impression so far from the e-mail correspondence.