[Leica] IR Cut filters Comparo and Question

[glehrer at san.rr.com (Jerry Lehrer)]

Howard,

Along these topics, I notice that B&H is advertising Tiffen  "Hot Mirror 
for Digital Cameras"in lots of NON-M Leica lens
size. (Like the popular Nikon F size; 52mm)

I thought that the M8 was the only digital camera that had the IR 
super-sensitivity problem.  (Yes I know that I can adapt
Nikon F lenses to M Leicas, but it is only practical for wide angle lenses)

What other cameras have that problem?

Jerry




Howard Cummer wrote:
> Hi Luggers,
>
> I now have two types of IR cut filters - heliopan and leica UV/IR cut 
> filters. On the Leica forum there is a lot of discussion about the 
> strength of different brands of filters, B&W being the strongest, 
> Leica the weakest and Heliopan in between.
>
> By the light reflected it does seem that the heliopan reflects more IR 
> than the Leica filter and is therefore slightly stronger.  Please see:
>
>
> http://gallery.leica-users.org/v/Howard+Cummer/UV+IR+Code+Pix/IR-Cut-FiltersW.jpg.html
>  
>
>
> http://tinyurl.com/2je3u8
>
> Whether this makes any difference in real world pictures is a matter 
> of debate but the consensus is forming on the forum that for focal 
> lengths 21mm and wider Leica filters are more compatible with the 
> adjustments provided by the 1.012 firmware update when using coded 
> lenses and for narrower view lenses it doesn't matter so much which IR 
> cut filter is used.
>
> Just my 2 cents additional for today.
>
> Cheers
> Howard (in Hong Kong and now going out to take pictures.)
>
>