IIRC there is also a front or back focus effect from IR because of the different wavelength so some places recalibrate AF to reflect that change.
2011/5/25 Rob Studdert <[email protected]>: > On 25 May 2011 19:19, sky <[email protected]> wrote: >> A guest at the club had a talk about this very subject so will pass one what >> i can remember of it. >> Apperantly, the sensors are very senative to IR but the camera manufractors >> put an IR cut filter in front of the sensor as part of the sensor assembly. >> All that is required is to remove that IR cut filter and you have an IR >> camera. No need to add IR filters to the lens once this is done. >> Most camera repair places can do this for you. >> >> I haven't researched this, only going by what this guy said. He has taken >> many IR photos with his modded camera. > > You need to either put an IR pass in front of the sensor, replacing > the IR stop filter or put an IR pass filter on the lens. The later > gives more flexibility as you change change filters easily but negates > the value of the SLR finder. > > -- > Rob Studdert (Digital Image Studio) > Tel: +61-418-166-870 UTC +10 Hours > Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. > -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
