UV/IR filters with M11

[mirekti]

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I've been trying to find if this was covered, but my search skills seem to be limited. Most of the hits I get are about the new sensor which has a newly developed thin UV/IR (glass??), but was not able to figure out how "effective" it is.
In few weeks I'll be traveling to Hawaii and have few B&W F-Pro UV/IR cut filters. Should I screw them in? 

Edited November 19, 2022 by mirekti

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[jdlaing]

15 minutes ago, mirekti said:

I've been trying to find if this was covered, but my search skills seem to be limited. Most of the hits I get are about the new sensor which has a newly developed thin UV/IR (glass??), but was not able to figure out how "effective" it is.
In few weeks I'll be traveling to Hawaii and have few B&W F-Pro UV/IR cut filters. Should I screw them in? 

It would never hurt to try them.

[darylgo]

I use the uv/ir filters interchangeably with UV, Skylight and occasionally an 81a filters, the difference is imperceivable.   Some forum members say the uv/ir filters cast a slight color tint on the edges of the frames with wide angle lenses.  My images don't show this or it's so subtle I don't notice.  

All Leica M digital cameras leak IR, it's improving with each new sensor, I haven't tested the M11, my guess is it leaks.  

[01af]

Am 19.11.2022 um 02:34 schrieb mirekti:

... B+W F-Pro UV/IR cut filters. Should I screw them in?

No.

[mirekti]

1 hour ago, 01af said:

No.

Not an elaborated answer I was looking for, but given your history on this forum I might just take it for granted. 

Edited November 21, 2022 by mirekti

[sdk]

The M11 is supposed to have a very effective IR filter over the sensor, better than previous digital M cameras, and modern lenses block most UV light. So you really don't need a UV/IR filter. Any filter will degrade image quality, with decreased resolution and more surfaces for flare. So unless you're using a filter for a specific purpose, or to protect the front element in harsh environments, it's probably best to avoid using them. 

[Huss]

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On 11/18/2022 at 5:34 PM, mirekti said:

I've been trying to find if this was covered, but my search skills seem to be limited. Most of the hits I get are about the new sensor which has a newly developed thin UV/IR (glass??), but was not able to figure out how "effective" it is.
In few weeks I'll be traveling to Hawaii and have few B&W F-Pro UV/IR cut filters. Should I screw them in? 

Why not try them now and see?  No need to wait for Hawaii!

[Jeff S]

I sold mine along with my M8.2.  Not missed  on subsequent models.

Jeff

[darylgo]

4 hours ago, sdk said:

The M11 is supposed to have a very effective IR filter over the sensor, better than previous digital M cameras, and modern lenses block most UV light. So you really don't need a UV/IR filter. Any filter will degrade image quality, with decreased resolution and more surfaces for flare. So unless you're using a filter for a specific purpose, or to protect the front element in harsh environments, it's probably best to avoid using them. 

Supposed is the key word here, when I get a chance I’ll test it at a Leica store. Leica has been saying this with the M9, it leaked and the M10, it leaked.  With such a poor track record can they be believed.  As a practical matter it likely makes no difference in most shooting situations so for all intents and purposes with or without gives the same net result. 

[Jewl]

I have one on my 35mm lux and can sleep way better with it on  

From a quality perspective, I do not see any issues (i.e. flaring or reflections at night) - The B+W filters are very great as compared to diffusion filters such as the black promist by tiffen (there you have a lot of reflections etc. at night for example). 

 

[lct]

Leica UV/IR filters made for the M8 look too strong on the M11. They reduce magenta and increase cyan, giving images a colder rendition. Not my cup of tea but it does no harm to try.

[jaapv]

On 11/22/2022 at 8:57 AM, darylgo said:

Leica has been saying this with the M9, it leaked and the M10,

As did the M240. Noon light in the tropics was impossible to correct from the yellow IR cast.

[darylgo]

4 minutes ago, jaapv said:

As did the M240. Noon light in the tropics was impossible to correct from the yellow IR cast.

How could I forget the M240, it had bountiful leakage.

Did you try to reduce yellow with hue, saturation, luminance?  If that doesn't work rose colored glasses turns everything pink and happiness will ensue. 🙂

[jaapv]

Not even in LAB B&W conversions, I fear...

[Shepherdphotographer]

On 11/22/2022 at 3:50 AM, sdk said:

The M11 is supposed to have a very effective IR filter over the sensor, better than previous digital M cameras, and modern lenses block most UV light. So you really don't need a UV/IR filter. Any filter will degrade image quality, with decreased resolution and more surfaces for flare. So unless you're using a filter for a specific purpose, or to protect the front element in harsh environments, it's probably best to avoid using them. 

Good morning, I I reopen this old thread to find out if there are differences between a normal UV filter and an IR / UV. I've created a new thread to ask about this, but haven't received any comprehensive answers yet. I would use this filter, only as protection from scratches and dust, on a Leitz Elmarit-R 90/2.8 I version, therefore a non-modern lens (referring to what is written in this forum about the fact that modern lenses already have a layer of IR protection). Will this result in heavy shifts or changes in colour? As for the degradation of image quality using filters mounted on a lens, as a systematic effect, I have been mounting UV protection filters on lenses for almost thirty years and I have never considered this effect so evident, for my needs, or, in any case, more important not to protect the lens in order not to alter the yield of a lens in the slightest, rather than the other way around. Are there difference between an UV simple, classic Leica filter and an IR/UV? Thanks.

[Shepherdphotographer]

On 11/23/2022 at 3:55 AM, lct said:

Leica UV/IR filters made for the M8 look too strong on the M11. They reduce magenta and increase cyan, giving images a colder rendition. Not my cup of tea but it does no harm to try.

Would I get the same effect on a Leica SL (TYP-601), not as modern as an M11 and not as old as an M8, by mounting it on a first version Leitz Elmarit-R 90/2.8 (therefore a fairly old lens)? Is it very different from a classic Leica uv filter? Thank you.

[lct]

1 hour ago, Shepherdphotographer said:

Would I get the same effect on a Leica SL (TYP-601), not as modern as an M11 and not as old as an M8, by mounting it on a first version Leitz Elmarit-R 90/2.8 (therefore a fairly old lens)? Is it very different from a classic Leica uv filter? Thank you.

I have no experience with SL cameras but UV/IR filters are IR-cut filters that have been provided by Leica for M8 and M8.2 cameras only due to lack of IR filtration in those bodies. Normally modern cameras don't suffer from the same issue and lenses have nothing to do with it. May i ask why you feel the need to use such a filter?

[darylgo]

Then SL sensor was designed with Leica gaining great experience from many leaking M sensors prior.  It is opaque to IR from my tests and a Uv/Ir filter would only create potential issues.  A normal UV or protective filter would be best.  

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[jaapv]

Newer M cameras still have thin IR filters on the sensor and may, under circumstances, require an IR cut filter for correct colour. I even use one on my SL 601 Sigma 105-600  when in the tropics  - and don’t bother to remove it during the rest of the year. I never see adverse effects bar the occasional green reflection of a highlight but I do see a reduction of yellow cast in noon tropical sunlight. 

[jaapv]

BTW there is nothing new or digital about IR cut filters. Although film is relatively insensitive to IR light, “Hot” filters were used to correct skin tones on portraits under Tungsten light, for instance.