IR Filter Comparison: Urth 72 VS Zomei 720
IR Filter Comparison: Urth 72 VS Zomei 720
IR Filter Comparison: Urth 72 VS Zomei 720
2489IE_E100_13_SDIV3200_poswb.jpg
2489IE_E100_13_SDIV3200_posw.jpg
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Andrew O'Neill

IR Filter Comparison: Urth 72 VS Zomei 720

Comparing the two filters. One expensive (top), one cheap. Urth is the expensive one. Interesting find. Zomei did better at gathering what little IR energy there was. The Urth was 2 stops faster, though...pretty much explains why all my IR film shots were over exposed last Summer...
Click to expand...
Equipment Used
D850
Exposure
ISO 400; f/22 @ 10 sec
Lens Filter
Urth 72; Zomei 720
Digital Post Processing Details
Gray scaled. Black/White points adjusted.
I'm surprised there is that much difference. Andy, do you see that much difference with film also? I have the Urth72 and a Hoya 72 in a smaller size, but never really did an apples to apples comparison of the two.
 
Andrew O'Neill
John Wiegerink said:
I'm surprised there is that much difference. Andy, do you see that much difference with film also? I have the Urth72 and a Hoya 72 in a smaller size, but never really did an apples to apples comparison of the two.
Click to expand...

I was way over exposing the Urth filtered shots the last time I used it on film (in Japan), so couldn't really see a difference. The Sun is supposed to make an appearance here tomorrow, so I'm hoping to get out with a roll of Rollei. I'll shoot it through both filters. I want to have this all sorted by the time I leave for Japan on Monday...
 
PhotoBob
I've used zomei for several years and really have been pleased with the results.
On the other hand, I've used Gobe for deep ND and it has performed admirably.
 
Andrew O'Neill
PhotoBob said:
I've used zomei for several years and really have been pleased with the results.
On the other hand, I've used Gobe for deep ND and it has performed admirably.
Click to expand...
I've gone through several Zomei IR filters over the years. A couple of the older ones, delaminated. The newer ones appear to be a single piece of glass, and much thinner. I'm popping out today with both filters brands, and a roll of film...
 
Andrew O'Neill said:
I've gone through several Zomei IR filters over the years. A couple of the older ones, delaminated. The newer ones appear to be a single piece of glass, and much thinner. I'm popping out today with both filters brands, and a roll of film...
Click to expand...
Can't wait to see what the outcome is Andy. I need a 67mm R72 and the Zomei might fit the bill just fine. The Urth and Hoya R72 filters get pretty pricey in 67mm and 72mm sizes.
 
Andrew O'Neill
George Collier said:
How do you take your basic readings? Incident, gray card, a particular zone?
I assume you just add the factor and then print both negs with the same exposure and paper.
Click to expand...
The test above was with a D850. I used the camera's metre.
With film, I metre for the shadows, and place on zone III or IV. The factor is applied to my hand held reflective metre. Sometimes I'll use a grey card.
I don't print on gelatin silver papers. I use Alt. processes. Sometimes I make a digi/inkjet negative.
 

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Technical Gallery
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Andrew O'Neill
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Urth_Zomei_IR_Comparison.jpg
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Fri, 11 April 2025 11:25 AM
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