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Does the R-D1 Require IR Filters Like the M8?


rick123

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Rick,

 

The RD1 has a stronger IR cut filter on the sensor, but it 'leaks' some IR to the sensor. I use both the RD1 and the M8. Actually the RD1 is not seeing much sevice now!:D

 

Prior to the M8, I was not aware of IR effects on the RD1, but now, retrospectively, I can find many examples, but not as bad as the M8. I am fitting IR cut filters to all my Leica lenses and will switch from M8 to RD1 with them in place. The results on the M8 are asoundingly better and significantly better on the RD1.

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Sorry to contradict you Erl but it isn't that obvious about the Epson R-D1 having a "stronger" IR cut filter.

 

The CCD of Epson is very different than that of the M8. Blue/red channel responses differ radically.

 

Yes, the magentas are less obvious on the Epson. However, if a strong IR cut filter is used when there is little IR, one gets cyan casts from the Epson.

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Sorry to contradict you Erl but it isn't that obvious about the Epson R-D1 having a "stronger" IR cut filter.

Vivek, I'm definately not a 'tech' expert, but would it be reasonable to say instead the M8 has less IR cut on the sensor than the RD!?

 

My theory is that even if the 486 filters are stronger than is required by the RD1, the filter can only cut any IR that is present. It can't cut more than is there. My only support for this observation is that this appears to work on my RD1, all though I have not done extensive testing, only a brief test on known 'problem' subjects to assure myself of the wise technique when using the RD1 as my fall back camera.

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Thank you kindly Erl & Vivek. As I continue to enjoy the use of my D-Lux 2, my Summilux-M 50mm f/1.4 (preASPH) is becoming jealous since it is attached to my M6. I continue to ponder M8, R-D1, or wait...

 

Rick

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After being sensitized by the M8 hoopla, I think most digital camera's need IR cut filters. I posted a Digilux2 shot elsewhere with very clear IR contamination. At the time I thought the result just pleasing - which it was.

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