uv/ir filters, leica and b+w...

[back alley]

i understand that the leica filters are not multi coated while the b+w are...

is this true?
any difference in how they behave/effectiveness?

joe

 

[back alley]

mine are on cv lenses used on the rd1...i'm prepping in case i ever get an m8...can't say that i've noticed a difference but i'm not shooting much lately.

 

[LeicaFan]

Rather than making a new thread, I thought I'd just ask in this one.

What is the point of UV/IR filters? The UV part I know, but what about IR? From what I've read, it makes black colors look more black, rather than purple, but I have only seen examples like this on the M8. Would the same effect be achieved on a film camera?

 

[efix]

Rather than making a new thread, I thought I'd just ask in this one.

What is the point of UV/IR filters? The UV part I know, but what about IR? From what I've read, it makes black colors look more black, rather than purple, but I have only seen examples like this on the M8. Would the same effect be achieved on a film camera?

Film normally isn't IR sensitive, so using a UV/IR filter with film makes no sense. However, the M8 isn't the only camera with an IR sensitive sensor. The Nikon D2s, if I recall correctly, also hase some IR sensitivity due to which you need IR cut filters. And then there are those cameras that have an IR sensitive sensor on purpose, for IR photography. If you want to take non-IR (i.e. "normal") pictures with these, you'll also need such a filter.

The fact is that the IR wavelengths will be translated into all kinds of reddish shades ranging from yellow to purple in the final images, making plantlife, black fabric and faces (among other things reflecting IR wavelengths) look odd, since the human eye isn't sensitive to IR (or just hardly). Thus, with the M8, which is highly sensitive both to IR and UV wavelengths (as it lacks the appropriate filter on the sensor), you will want to use such a filter for colour photography, in order not to get strange colours in your pictures.

Btw, it's a topic discussed at length since 2006 and in virtually any forum that deals with the M8. Just do a search for it if you need more info.

 

[kermaier]

Anyone able to comment on whether UV/IR filters contribute more to flare than just UV filters? (I also use them on my R-D1, though I find they're only really needed under incandescent lighting.) I guess what I'm asking is, if I already own a full complement of UV/IR filters in the range of sizes for my lenses, is there any downside to using them in situations where one would normally just use a plain UV filter?

::Ari

 

[LeicaFan]

Film normally isn't IR sensitive, so using a UV/IR filter with film makes no sense. However, the M8 isn't the only camera with an IR sensitive sensor. The Nikon D2s, if I recall correctly, also hase some IR sensitivity due to which you need IR cut filters. And then there are those cameras that have an IR sensitive sensor on purpose, for IR photography. If you want to take non-IR (i.e. "normal") pictures with these, you'll also need such a filter.

The fact is that the IR wavelengths will be translated into all kinds of reddish shades ranging from yellow to purple in the final images, making plantlife, black fabric and faces (among other things reflecting IR wavelengths) look odd, since the human eye isn't sensitive to IR (or just hardly). Thus, with the M8, which is highly sensitive both to IR and UV wavelengths (as it lacks the appropriate filter on the sensor), you will want to use such a filter for colour photography, in order not to get strange colours in your pictures.

Btw, it's a topic discussed at length since 2006 and in virtually any forum that deals with the M8. Just do a search for it if you need more info.

Thanks for the explanation!

 

[Sonnar Brian]

UV/IR filters are more likely to produce Color tinging and reflections.

Here is an extreme example, on my Canon 50/1.2.

This is with a Tiffen Hot-Mirror filter, which is what they were referred to in the 90s.