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Hi Matt,
Unfortunately I have no experience with this Filter because my EOS camera was stolen before I could get to use the filter..hence why it is NIB with the seal intact.
From the Astronomik website:
Question:
When I use the Clip-Filter Systems do I still have to make other modifications to my Canon EOS digital camera for astro-imaging? Specifically, removing the camera’s OEM IR-blocking filter over the sensor?
Answer:
The Astronomik Clip-Filter System does not have anything directly to do with a digital camera’s “IR-band blocking filter”.
Regular photographic digital camera sensors have a very small sensitivity in the H-alpha line portion of the spectrum which is bad for regular photographs but very important for astro-imaging. Hence, Canon sells it’s cameras with an internal “IR-blocking filter” over the sensor to remove the over abundance of ‘red’ due to Infrared from ordinary photos.
For astro-imaging, sensitivity in the red (the H-alpha line) is desired and is achieved by the removal of the camera’s internal IR blocking filter.
The Clip-Filter System has no idea if Canon’s IR-blocking filter is installed or whether it has been removed. The Clip-Filter System can be used with both converted and with un-converted cameras with equal results..
Your best bet would be to pose your questions to the more experienced DSLR users on the Imaging forum.
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