All Forum Comments
Comment by abesad posted on Lee filter Big Stopper at 05/05/2010 - 16:03
regards susan
Comment by abesad posted on circular polarizer multi-coated glass or not? at 01/05/2010 - 17:04
Thanks again
susan
Comment by abesad posted on circular polarizer multi-coated glass or not? at 01/05/2010 - 15:13
Thanks very much everyone for taking the time to look and hopefully answer these questions.
susan
Comment by abesad posted on circular polarizer multi-coated glass or not? at 01/05/2010 - 12:30
regards
Comment by abesad posted on infrared filter at 16/08/2009 - 08:37
Comment by abesad posted on infrared filter at 15/08/2009 - 07:25
This one was done with the K10D and a cokin infrared filter so it is possible.

Full version with metadata link
Shutter Speed: 1 second
F Number: F/5.6
Focal Length: 18 mm
ISO Speed: 400
This is not the standard black and white infrared but it really is a infrared photo and made it into a duotone photo. Since you only use the red pixels you lose 1/4th of the resolution
Comment by abesad posted on infrared filter at 14/08/2009 - 21:33
My attempts at this involved 20 or 30 second exposures with apertures in the f5.6-9.5 range (and 100 ISO). As the guys on here pointed out, it's an uphill struggle given the effectiveness of the sensors' IR filtration. It's worth a try though and I'll have another go if the sun ever comes out again.
Comment by abesad posted on infrared filter at 14/08/2009 - 09:59
Just to quickly try the K20D with infrared; today in sunlight I found that, ISO 800 and 2secs @ f8 achieved a reasonable image. These are a lot longer exposures than on the Pentax istDL2.
regards
Comment by abesad posted on infrared filter at 14/08/2009 - 09:57
Comment by abesad posted on infrared filter at 14/08/2009 - 09:56


regards susan