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**HomeMadeSin** · 04-09-2017, 05:49 PM

I posted this on another side, but am really interested...And I've done a search but it seems the only answer is "use Nikon filters". The set-up: I have a D7100 that I had converted to full spectrum and want to rent the reportedly magnificent 200mm f2 lens with 52mm drop in filter. Problem is, I want to be able to take "normal" photos in addition to full spectrum and I have a 52mm hot mirror filter from Kolari (who did the conversion). However, it appears the permissible thickness of a filter for use in the Nikon drop in filter holder is an international secret. And Nikon does not offer that dimensional limitation anywhere I can find (lens manuals included) nor apparently their own 52mm hot mirror filter. Can anyone advise?

Thanks,
Z

**HomeMadeSin** · 04-10-2017, 01:27 PM

I realize this is somewhat obscure, but...really?!?

Jeff Lopez · 04-10-2017, 02:37 PM

best bet would be using a P filter holder and test with several square filters..
Since an ir filter has that aquamarine tint, probably you could use a laboratory square sample glass and then adjust the hue in camera..

**HomeMadeSin** · 04-10-2017, 04:02 PM

Thanks. I think I will try to chuck the hot mirror filter in a lathe and face it until it's thin enough (using cheap IR filters to soft jaw on). Worse case is I lose $50 on a filter...

Jeff Lopez · 04-10-2017, 05:45 PM

pics of the process will be great!

**HomeMadeSin** · 04-20-2017, 05:44 AM - **1 Like**

Good news, the filter fit w/o mods ...

Jeff Lopez · 04-20-2017, 12:19 PM

Originally posted by HomeMadeSin

Good news, the filter fit w/o mods ...

hey, thats great! good to know!
What type and brand did you use?

**HomeMadeSin** · 04-20-2017, 06:24 PM

The filter I used was a 52mm hot mirror filter sold by Kolari (who did my D7100 conversion to full spectrum). It was just under 7mm thick front to back.

04-09-2017, 05:49 PM	#1
HomeMadeSin Site Supporter Join Date: Apr 2012 Location: Savannah, GA Photos: Gallery Posts: 158	Big buck Nikon lens owners... I posted this on another side, but am really interested...And I've done a search but it seems the only answer is "use Nikon filters". The set-up: I have a D7100 that I had converted to full spectrum and want to rent the reportedly magnificent 200mm f2 lens with 52mm drop in filter. Problem is, I want to be able to take "normal" photos in addition to full spectrum and I have a 52mm hot mirror filter from Kolari (who did the conversion). However, it appears the permissible thickness of a filter for use in the Nikon drop in filter holder is an international secret. And Nikon does not offer that dimensional limitation anywhere I can find (lens manuals included) nor apparently their own 52mm hot mirror filter. Can anyone advise? Thanks, Z

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04-10-2017, 01:27 PM	#2
HomeMadeSin Site Supporter Join Date: Apr 2012 Location: Savannah, GA Photos: Gallery Posts: 158 Original Poster	I realize this is somewhat obscure, but...really?!?

04-10-2017, 02:37 PM	#3
Jeff Lopez Veteran Member Join Date: Dec 2016 Posts: 531	best bet would be using a P filter holder and test with several square filters.. Since an ir filter has that aquamarine tint, probably you could use a laboratory square sample glass and then adjust the hue in camera..

04-10-2017, 04:02 PM	#4
HomeMadeSin Site Supporter Join Date: Apr 2012 Location: Savannah, GA Photos: Gallery Posts: 158 Original Poster	Thanks. I think I will try to chuck the hot mirror filter in a lathe and face it until it's thin enough (using cheap IR filters to soft jaw on). Worse case is I lose $50 on a filter...

04-10-2017, 05:45 PM	#5
Jeff Lopez Veteran Member Join Date: Dec 2016 Posts: 531	pics of the process will be great!

04-20-2017, 05:44 AM - 1 Like	#6
HomeMadeSin Site Supporter Join Date: Apr 2012 Location: Savannah, GA Photos: Gallery Posts: 158 Original Poster	Good news, the filter fit w/o mods ...

04-20-2017, 12:19 PM	#7
Jeff Lopez Veteran Member Join Date: Dec 2016 Posts: 531	Originally posted by HomeMadeSin Good news, the filter fit w/o mods ... hey, thats great! good to know! What type and brand did you use?

04-20-2017, 06:24 PM	#8
HomeMadeSin Site Supporter Join Date: Apr 2012 Location: Savannah, GA Photos: Gallery Posts: 158 Original Poster	The filter I used was a 52mm hot mirror filter sold by Kolari (who did my D7100 conversion to full spectrum). It was just under 7mm thick front to back.

Big buck Nikon lens owners...

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