jbl Posted October 14, 2012 Share #1 Posted October 14, 2012 Advertisement (gone after registration) I was just reading Steve Huff's review and it appears to show that the MM is IR sensitive with an 89B filter. Am I reading this right? -jbl Quote Link to post Share on other sites More sharing options...
Advertisement Posted October 14, 2012 Posted October 14, 2012 Hi jbl, Take a look here MM IR sensitive?. I'm sure you'll find what you were looking for!
photomeme Posted October 14, 2012 Share #2 Posted October 14, 2012 I didn't see the ISO or aperture (doesn't appear to be super low shutter speed). i'd be cautious. This chart of the MM's spectral sensitivity: http://www.l-camera-forum.com/leica-forum/attachments/leica-m9-forum/317355d1337922930-m9m-spectral-sensitivity-spectral-sensitivity-leica-m-monochrom.pdf shows some continuing sensitivity past 650 and even 700 (although note it's declining , and this is a logarthmic chart.. this chart shows the 89B blocking most light below 700 Infrared Photography 2 - photo.net although the marketing blurb on amazon says it blocks below 650 Amazon.com: B + W 55mm Infrared Filter # 092 (89B): Electronics 1 Quote Link to post Share on other sites More sharing options...
brill64 Posted October 15, 2012 Share #3 Posted October 15, 2012 you could try cranking up the iso & fitting a 0.72 on an m9 & see what you get. not exactly infra-red or even entirely usable. since you can push the iso up even further on an mm, it's feasible that you could fit an 0.73, a true infra-red filter, & see some trace of effect on your image. you may need a tripod & a lot of patience, though & it may be a lot easier with a modified dslr or, dare i say, ir film. Quote Link to post Share on other sites More sharing options...
01af Posted October 15, 2012 Share #4 Posted October 15, 2012 I was just reading Steve Huff's review and it appears to show that the M Monochrom is IR-sensitive with an #89B filter. Am I reading this right? Yes, you are. But the sensitivity is pretty low so it's hard to take advantage of it in real-life shooting. With a Wratten #88A or Schott RG 715 filter in bright sunshine, you'll shoot at, say, f/4 and 1/125 s at ISO 10,000/41°. When using a tripod then you'd shoot f/5.6 and 1/2 s at ISO 320/26°, for example. So for hand-held shooting you'll need to crank up the ISO setting up to or near the very limit. For best image quality at moderate ISO settings you'll need a tripod. With a Wratten #89B or Schott RG 695, you'll gain a few stops, but you'll also get less pronounced infrared imaging effects (haze penetration, Wood effect etc). The M9's IR sensitivity is approx. one or maybe two f-stops higher than the M Monochrom's, and the M8's is even higher. 1 Quote Link to post Share on other sites More sharing options...
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