I recently modified my Canon 1000D to provide a FULL full spectrum mod.
This involved removing both the colour correction filter (the one normally removed for improved red response) and the front anti-alias/ dust shake filter -which acts as a UV-IR cut filter.
When I tried the camera with only the colour correction filter removed I found a definate cut-off at 400nm and 700nm. This was extended to <380nm and into the NIR after the second filter was removed.
I have various spectra which show this result...
I was therefore surprised to see a "test" by Gary Honis on a camera with only the correct correction filter removed which seems to show a positive response to an IR LED (from the web this seems to be around 950nm)
http://ghonis2.ho8.com//Tests/LPF2starbloat.html
How can this be???
OT but a question on DSLR filters???
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OT but a question on DSLR filters???
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
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http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
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http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
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Re: OT but a question on DSLR filters???
Just a note here, when I was at SCAE I sat and listened to the Hutech rep explain to a potential customer how the H-Alpha line was at 640nm and that all DSLR's were designed to cutoff everything below 700nm and that his upgrade would allow the DSLR to take pictures of the H-Alpha line at 640nm...
I just walked off
I just walked off
Stephen W. Ramsden
Atlanta, GA USA
Founder/Director Charlie Bates Solar Astronomy Project
http://www.solarastronomy.org
Atlanta, GA USA
Founder/Director Charlie Bates Solar Astronomy Project
http://www.solarastronomy.org
- swisswalter
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Re: OT but a question on DSLR filters???
:silly:
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
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Re: OT but a question on DSLR filters???
How can this be???
In the plumbing trade I believe this is described as a load of ball cocks... :whistle: :silly:
In the plumbing trade I believe this is described as a load of ball cocks... :whistle: :silly:
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
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Re: OT but a question on DSLR filters???
Hi Ken,
I have 2 modded DSLR, one EOS Rebel made here in Mexico and one Hutech EOS 20D. I will test it next week with my LISA and see what happens.
I have 2 modded DSLR, one EOS Rebel made here in Mexico and one Hutech EOS 20D. I will test it next week with my LISA and see what happens.
regards Rainer
Observatorio Real de 14
San Luis Potosi Mexico
North 22° West 101°
Observatorio Real de 14
San Luis Potosi Mexico
North 22° West 101°